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Posted to notifications@skywalking.apache.org by gi...@apache.org on 2021/02/09 06:18:16 UTC

[skywalking-website] branch asf-site updated: deploy: 4e23bc65d2adac25985e4c28e682fb363825e148

This is an automated email from the ASF dual-hosted git repository.

github-bot pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/skywalking-website.git


The following commit(s) were added to refs/heads/asf-site by this push:
     new 341b2bf  deploy: 4e23bc65d2adac25985e4c28e682fb363825e148
341b2bf is described below

commit 341b2bf2d8ac4c8615b4811292e6bc69dcd97660
Author: wu-sheng <wu...@users.noreply.github.com>
AuthorDate: Tue Feb 9 06:18:04 2021 +0000

    deploy: 4e23bc65d2adac25985e4c28e682fb363825e148
---
 blog/2018-05-24-skywalking-net/index.html          |  10 +-
 .../index.html                                     |  10 +-
 blog/2019-01-01-understand-trace/index.html        |  10 +-
 blog/2019-01-25-mesh-loadtest/index.html           |  10 +-
 blog/2019-09-25-alarm-webhook-share/index.html     |  10 +-
 .../index.html                                     |  10 +-
 .../index.html                                     |  10 +-
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 .../index.html                                     |  12 +-
 .../agent.png                                      | Bin 0 -> 150009 bytes
 .../index.html                                     | 127 ++++---
 .../plugin.png                                     | Bin 0 -> 182678 bytes
 .../sky-plugins.png                                | Bin 0 -> 128262 bytes
 blog/e2e-design/index.html                         |  10 +-
 blog/index.html                                    |  38 +-
 blog/index.xml                                     |  58 +++
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 .../index.html                                     |   4 +-
 .../index.html                                     |   4 +-
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 .../index.html                                     |   4 +-
 .../index.html                                     |   4 +-
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 .../index.html                                     |   4 +-
 .../skywalking-nginx-lua-0-1-0-release/index.html  |   4 +-
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 events/welcome-gui-cao-as-new-committer/index.html |   4 +-
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 .../index.html                                     |   4 +-
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 .../index.html                                     |   4 +-
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 194 files changed, 1251 insertions(+), 829 deletions(-)

diff --git a/blog/2018-05-24-skywalking-net/index.html b/blog/2018-05-24-skywalking-net/index.html
index 855fba8..c2e4099 100644
--- a/blog/2018-05-24-skywalking-net/index.html
+++ b/blog/2018-05-24-skywalking-net/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2018-05-24-skywalking-net/" />
 <meta property="article:published_time" content="2018-05-24T00:00:00+00:00" />
-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Apache SkyWalking provides open source APM and distributed tracing in .NET Core field">
 <meta itemprop="description" content="SkyWalking .NET Core SDK is available.">
 <meta itemprop="datePublished" content="2018-05-24T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="wordCount" content="349">
 
 
@@ -260,7 +260,7 @@ dotnet run -p sample/SkyWalking.Sample.Frontend</p>
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -290,7 +290,7 @@ dotnet run -p sample/SkyWalking.Sample.Frontend</p>
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -340,7 +340,7 @@ dotnet run -p sample/SkyWalking.Sample.Frontend</p>
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
diff --git a/blog/2018-12-12-skywalking-service-mesh-ready/index.html b/blog/2018-12-12-skywalking-service-mesh-ready/index.html
index d7b6f5e..cc20f14 100644
--- a/blog/2018-12-12-skywalking-service-mesh-ready/index.html
+++ b/blog/2018-12-12-skywalking-service-mesh-ready/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2018-12-12-skywalking-service-mesh-ready/" />
 <meta property="article:published_time" content="2018-12-05T00:00:00+00:00" />
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+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="SkyWalking v6 is Service Mesh ready">
 <meta itemprop="description" content="The integration of SkyWalking and Istio Service Mesh yields an essential open-source tool for resolving the chaos created by the proliferation of siloed, cloud-based services.">
 <meta itemprop="datePublished" content="2018-12-05T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
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 <meta itemprop="wordCount" content="990">
 
 
@@ -304,7 +304,7 @@ This is why we are embracing Skywalking, which makes service performance observa
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
@@ -334,7 +334,7 @@ This is why we are embracing Skywalking, which makes service performance observa
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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         <li>
@@ -384,7 +384,7 @@ This is why we are embracing Skywalking, which makes service performance observa
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
diff --git a/blog/2019-01-01-understand-trace/index.html b/blog/2019-01-01-understand-trace/index.html
index f8e0b73..61ed678 100644
--- a/blog/2019-01-01-understand-trace/index.html
+++ b/blog/2019-01-01-understand-trace/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2019-01-01-understand-trace/" />
 <meta property="article:published_time" content="2019-01-01T00:00:00+00:00" />
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+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Understand distributed trace easier in the incoming 6-GA">
 <meta itemprop="description" content="Distributed tracing is a necessary part of modern microservices architecture, but how to understand or use distributed tracing data is unclear to some end users. This blog overviews typical distributed tracing use cases with new visualization features in SkyWalking v6.">
 <meta itemprop="datePublished" content="2019-01-01T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="wordCount" content="702">
 
 
@@ -261,7 +261,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -291,7 +291,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -341,7 +341,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
diff --git a/blog/2019-01-25-mesh-loadtest/index.html b/blog/2019-01-25-mesh-loadtest/index.html
index b0529a3..9bd4ebc 100644
--- a/blog/2019-01-25-mesh-loadtest/index.html
+++ b/blog/2019-01-25-mesh-loadtest/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2019-01-25-mesh-loadtest/" />
 <meta property="article:published_time" content="2019-01-25T00:00:00+00:00" />
-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="SkyWalking performance in Service Mesh scenario">
 <meta itemprop="description" content="Service mesh receiver performance test on Google Kubernetes Engine.">
 <meta itemprop="datePublished" content="2019-01-25T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="wordCount" content="758">
 
 
@@ -263,7 +263,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -293,7 +293,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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         <li>
@@ -343,7 +343,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/blog/2019-09-25-alarm-webhook-share/index.html b/blog/2019-09-25-alarm-webhook-share/index.html
index 373d3ad..8d4b6b9 100644
--- a/blog/2019-09-25-alarm-webhook-share/index.html
+++ b/blog/2019-09-25-alarm-webhook-share/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2019-09-25-alarm-webhook-share/" />
 <meta property="article:published_time" content="2019-09-25T00:00:00+00:00" />
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+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="SkyWalking alarm webhook sharing">
 <meta itemprop="description" content=" Alerts via SkyWalking alarm webhook for better perception of tracing.">
 <meta itemprop="datePublished" content="2019-09-25T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="wordCount" content="104">
 
 
@@ -248,7 +248,7 @@ bash build/build.sh
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
@@ -278,7 +278,7 @@ bash build/build.sh
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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         <li>
@@ -328,7 +328,7 @@ bash build/build.sh
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
diff --git a/blog/2020-01-20-celebrate-200th-contributor/index.html b/blog/2020-01-20-celebrate-200th-contributor/index.html
index 6c653b3..a0035a9 100644
--- a/blog/2020-01-20-celebrate-200th-contributor/index.html
+++ b/blog/2020-01-20-celebrate-200th-contributor/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-01-20-celebrate-200th-contributor/" />
 <meta property="article:published_time" content="2020-01-20T00:00:00+00:00" />
-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="SkyWalking hits 200 contributors mark">
 <meta itemprop="description" content=" SkyWalking community joins the 200&#43; contributors open source club.">
 <meta itemprop="datePublished" content="2020-01-20T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="wordCount" content="643">
 
 
@@ -229,7 +229,7 @@ At the moment of graduation in spring 2019, the project had 100 contributors. No
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
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+            <span class="count">3</span>
         </li>
         
         <li>
@@ -259,7 +259,7 @@ At the moment of graduation in spring 2019, the project had 100 contributors. No
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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@@ -309,7 +309,7 @@ At the moment of graduation in spring 2019, the project had 100 contributors. No
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
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index 4d2fd0a..836fc1a 100644
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@@ -307,7 +307,7 @@ try {
         
         <li>
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index 6e8c2b7..280761b 100644
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@@ -310,7 +310,7 @@ Apdex Score  =  ------------------------------------------------------
         
         <li>
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         <li>
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index 2acf7e2..9bb7a86 100644
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         <li>
@@ -277,7 +277,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
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         <li>
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index 7a640ff..d88586b 100644
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         <li>
@@ -314,7 +314,7 @@ if (!doNotTrack) {
         
         <li>
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index 0d29c53..3c9fd39 100644
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         <li>
@@ -277,7 +277,7 @@ if (!doNotTrack) {
         
         <li>
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         <li>
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@@ -300,7 +300,7 @@ Many developers have joined the ASF as new contributors, committers, foundation
         
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index 7a0bed1..5c9744a 100644
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         <li>
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index 75c29a5..635b6e1 100644
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         <li>
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index d9983db..de045a2 100644
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@@ -219,7 +219,7 @@ if (!doNotTrack) {
         
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         <li>
@@ -249,7 +249,7 @@ if (!doNotTrack) {
         
         <li>
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@@ -299,7 +299,7 @@ if (!doNotTrack) {
         
         <li>
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index c7cca0b..2869a7b 100644
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@@ -219,7 +219,7 @@ if (!doNotTrack) {
         
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diff --git a/blog/2020-12-03-obs-service-mesh-with-sw-and-als/index.html b/blog/2020-12-03-obs-service-mesh-with-sw-and-als/index.html
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@@ -354,7 +354,7 @@ If you want to  have commercial support for the ALS solution or hybrid mesh obse
         
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-            <span class="count">2</span>
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-            <span class="count">2</span>
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@@ -608,7 +608,7 @@ quicker than before, like why we named the project as SkyWalking, we will have a
         
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@@ -237,7 +237,7 @@ In the later 2021, we will begin to invest the posibility of creating SkyWalking
         
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@@ -350,7 +350,7 @@ Note: Clear the browser local cache if you used it to access deployments of  pre
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-    <a  class="btn btn-primary  disabled">Next <span class="ml-1">→</span></a>
+    <a href="/blog/2021-02-09-skywalking-trace-threadpool/" class="btn btn-primary ">Next <span class="ml-1">→</span></a>
   </li>
 </ul>
 
@@ -369,7 +369,7 @@ Note: Clear the browser local cache if you used it to access deployments of  pre
         
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+<title>Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor | Apache SkyWalking</title><meta property="og:title" content="Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor" />
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-	<h1>Apache SkyWalking provides open source APM and distributed tracing in .NET Core field</h1>
-	<div class="lead">SkyWalking .NET Core SDK is available.</div>
+	<h1>Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</h1>
+	<div class="lead">This post introduces how to propagate context between threads when using ThreadPoolExecutor, which SkyWalking agent should not enhance</div>
 	<div class="td-byline mb-4">
-		By <b>Haoyang Liu, the major maintainer of SkyWalking .NET Core agent</b> |
-		<time datetime="2018-05-24" class="text-muted">Thursday, May 24, 2018</time>
+		By <b>Binglong Li</b> |
+		<time datetime="2021-02-09" class="text-muted">Tuesday, February 09, 2021</time>
 
 
 		
 		<p class="mt-1 tags-box">
 			<i class="fas fa-tags" aria-hidden="true"></i>Tags |
 			
-			<span> <a href="/tags/dotnetcore">DotNetCore</a></span>
+			<span> <a href="/tags/java">Java</a></span>
 			
 			<span> <a href="/tags/agent">Agent</a></span>
 			
+			<span> <a href="/tags/tracing">Tracing</a></span>
+			
 		</p>
 		
 
 
 	</div>
-	<p>Translated by Sheng Wu.</p>
-<p>In many big systems, distributed and especially microservice architectures become more and more popular. With the increase of modules and services, one incoming request could cross dozens of service. How to pinpoint the issues of the online system, and the bottleneck of the whole distributed system? This became a very important problem, which must be resolved.</p>
-<p>To resolve the problems in distributed system, Google published the paper “Dapper, a Large-Scale Distributed Systems Tracing Infrastructure”, which mentioned the designs and ideas of building a distributed system. Many projects are inspired by it, created in the last 10 years. At 2015, Apache SkyWalking was created by Wu Sheng as a simple distributed system at first and open source. Through almost 3 years developments, at 2018, according to its 5.0.0-alpha/beta releases, it had alread [...]
-<p>At the early of this year, I was trying to build the Butterfly open source APM in .NET Core, and that is when I met the Apache SkyWalking team and its creator. I decided to join them, and cooperate with them, to provide .NET Core agent native compatible with SkyWalking. At April, I released the first version .NET core agent 0.1.0. After several weeks interation, we released 0.2.0, for increasing the stability and adding HttpClient, Database driver supports.</p>
-<p>Before we used .NET Core agent, we need to deploy SkyWalking collector, UI and ElasticSearch 5.x. You can download the release versions at here: <a href="http://skywalking.apache.org/downloads/">http://skywalking.apache.org/downloads/</a> and follow the docs (Deploy-backend-in-standalone-mode, Deploy-backend-in-cluster-mode) to setup the backend.</p>
-<p>At here, I are giving a quick start to represent, how to monitor a demo distributed .NET Core applications. I can say, that is easy.</p>
-<blockquote>
-<p>git clone <a href="https://github.com/OpenSkywalking/skywalking-netcore.git">https://github.com/OpenSkywalking/skywalking-netcore.git</a></p>
-</blockquote>
-<blockquote>
-<p>cd skywalking-netcore</p>
-</blockquote>
-<blockquote>
-<p>dotnet restore</p>
-</blockquote>
-<blockquote>
-<p>dotnet run -p sample/SkyWalking.Sample.Backend
-dotnet run -p sample/SkyWalking.Sample.Frontend</p>
-</blockquote>
-<p>Now you can open http://localhost:5001/api/values to access the demo application. Then you can open SkyWalking WebUI http://localhost:8080</p>
+	<p>When using SkyWalking java agent, people usually propagate context easily. They even do not need to change the business
+code. However, it becomes harder when you want to propagate context between threads when using ThreadPoolExecutor.
+You can use the RunnableWrapper in the maven artifact org.apache.skywalking:apm-toolkit-trace. This way you must change
+your code. The developer manager usually don&rsquo;t like this because there may be lots of projects, or lots of runnable code.
+If they don&rsquo;t use SkyWalking some day, the code added will be superfluous and inelegant.</p>
+<p>Is there a way to propagate context without changing the business code? Yes.</p>
+<p>Skywalking java agent enhances a class by add a field and implement an interface. The ThreadPoolExecutor is a special
+class that is used widely. We even don&rsquo;t know when and where it is loaded. Most JVMs do not allow changes in the class
+file format for classes that have been loaded previously. So SkyWalking should not enhance the ThreadPoolExecutor successfully by retransforming when the ThreadPoolExecutor has been loaded.
+However, we can apply advice to the ThreadPoolExecutor#execute method and wrap the Runnable param using our
+own agent, then enhance the wrapper class by SkyWalking java agent. An advice do not change the layout of a class.</p>
+<p>Now we should decide how to do this. You can use the RunnableWrapper in the maven artifact
+org.apache.skywalking:apm-toolkit-trace to wrap the param, but you need to face another problem. This RunnableWrapper
+has a plugin whose active condition is checking if there is @TraceCrossThread. Agent core uses net.bytebuddy.pool.TypePool.Default.WithLazyResolution.LazyTypeDescription to find the annotations
+of a class. The LazyTypeDescription finds annotations by using a URLClassLoader with no urls if the classloader is
+null(bootstrap classloader). So it can not find the @TraceCrossThread class unless you change the LocationStrategy of
+SkyWalking java agent builder.</p>
+<p>In <a href="https://github.com/libinglong/skywalking-threadpool-agent">this project</a>, I write my own wrapper class,
+and simply add a plugin with a name match condition.
+Next, Let me show you how these two agents work together.</p>
 <ul>
 <li>
-<p>Overview of the whole distributed system
-<img src="https://cdn-images-1.medium.com/max/1600/1*sZY-9RaSz40sAHLkhwSV5g.png"/></p>
-</li>
-<li>
-<p>Topology of distributed system
-<img src="https://cdn-images-1.medium.com/max/1600/1*mMEGHg12fziDdeoa4r9CrA.png"/></p>
-</li>
-<li>
-<p>Application view
-<img src="https://cdn-images-1.medium.com/max/1600/1*uxBlfP6Byvf8xpRpG-qRZw.png"/></p>
+<p>Move the plugin to the skywalking &ldquo;plugins&rdquo; directory.</p>
+<p><img src="plugin.png" alt="plugin"></p>
+<p><img src="sky-plugins.png" alt="plugins directory"></p>
 </li>
 <li>
-<p>Trace query
-<img src="https://cdn-images-1.medium.com/max/1600/1*bj8bdC7LscCD4tmcs8c_gg.png"/></p>
+<p>Add this agent after the SkyWalking agent since the wrapper class should not be loaded before
+SkyWalking agent instrumentation have finished. For example,</p>
+<blockquote>
+<p>java -javaagent:/path/to/skywalking-agent.jar -javaagent:/path/to/skywalking-tool-agent-v1.0.0.jar &hellip;</p>
+</blockquote>
+<p><img src="agent.png" alt="agent.png"></p>
 </li>
 <li>
-<p>Span’s tags, logs and related traces
-<img src="https://cdn-images-1.medium.com/max/1600/1*bj8bdC7LscCD4tmcs8c_gg.png"/></p>
-</li>
-</ul>
-<h2 id="github">GitHub</h2>
+<p>When our application runs</p>
 <ul>
-<li>Website: <a href="http://skywalking.apache.org/">http://skywalking.apache.org/</a></li>
-<li>SkyWalking Github Repo: <a href="https://github.com/apache/incubator-skywalking">https://github.com/apache/incubator-skywalking</a></li>
-<li>SkyWalking-NetCore Github Repo: <a href="https://github.com/OpenSkywalking/skywalking-netcore">https://github.com/OpenSkywalking/skywalking-netcore</a></li>
+<li>SkyWalking java agent adds a transformer by parsing the plugin for enhancing the wrapper class in the tool agent.</li>
+<li>The tool agent loads the wrapper class into bootstrap classloader. This triggers the previous transformer.</li>
+<li>The tool agent applies an advice to the ThreadPoolExecutor class, wrapping the java.lang.Runnable param of &ldquo;execute&rdquo; method with the wrapper class.</li>
+<li>Now SkyWalking propagates the context with the wrapper class.</li>
+</ul>
+</li>
 </ul>
+<p>Enjoy tracing with ThreadPoolExecutor in SkyWalking!</p>
 
 	
 
 	<ul class="list-unstyled d-flex justify-content-between align-items-center mb-0 pt-5">
   <li>
-    <a  class="btn btn-primary  disabled"><span class="mr-1">←</span> Previous</a>
+    <a href="/blog/2021-02-07-infrastructure-monitoring/" class="btn btn-primary "><span class="mr-1">←</span> Previous</a>
   </li>
-    <a href="/blog/2018-12-12-skywalking-service-mesh-ready/" class="btn btn-primary ">Next <span class="ml-1">→</span></a>
+    <a  class="btn btn-primary  disabled">Next <span class="ml-1">→</span></a>
   </li>
 </ul>
 
@@ -260,7 +259,7 @@ dotnet run -p sample/SkyWalking.Sample.Frontend</p>
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -290,7 +289,7 @@ dotnet run -p sample/SkyWalking.Sample.Frontend</p>
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -340,7 +339,7 @@ dotnet run -p sample/SkyWalking.Sample.Frontend</p>
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/blog/2021-02-09-skywalking-trace-threadpool/plugin.png b/blog/2021-02-09-skywalking-trace-threadpool/plugin.png
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diff --git a/blog/e2e-design/index.html b/blog/e2e-design/index.html
index 0679cf1..c4f3b42 100644
--- a/blog/e2e-design/index.html
+++ b/blog/e2e-design/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/e2e-design/" />
 <meta property="article:published_time" content="2020-12-14T00:00:00+00:00" />
-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="[Design] NGE2E - Next Generation End-to-End Testing Framework">
 <meta itemprop="description" content="The design of Next Generation End-to-End Testing Framework">
 <meta itemprop="datePublished" content="2020-12-14T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="wordCount" content="1448">
 
 
@@ -447,7 +447,7 @@ func run() {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -477,7 +477,7 @@ func run() {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -527,7 +527,7 @@ func run() {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/blog/index.html b/blog/index.html
index 26fdd1a..5122bb6 100644
--- a/blog/index.html
+++ b/blog/index.html
@@ -173,6 +173,22 @@ if (!doNotTrack) {
 			
 			<li class="media mb-4">
 				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/2021-02-09-skywalking-trace-threadpool/">Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Tuesday, February 09, 2021 in Blog</small></p>
+					
+
+
+
+
+
+					<p class="pt-0 mt-0">When using SkyWalking java agent, people usually propagate context easily. They even do not need to change the business code. However, it becomes harder when you want to propagate context between threads when using ThreadPoolExecutor. You can use the …</p>
+					<p class="pt-0 mt-0">This post introduces how to propagate context between threads when using ThreadPoolExecutor, which SkyWalking agent should not enhance</p>
+					<p class="pt-0"><a href="/blog/2021-02-09-skywalking-trace-threadpool/">Read more</a></p>
+				</div>
+			</li>
+			
+			<li class="media mb-4">
+				<div class="media-body">
 					<h5 class="mt-0 mb-1"><a href="/blog/2021-02-07-infrastructure-monitoring/">SkyWalking 8.4 provides infrastructure monitoring</a></h5>
 					<p class="mb-2 mb-md-3"><small class="text-muted">Monday, February 08, 2021 in Blog</small></p>
 					
@@ -326,22 +342,6 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
 				</div>
 			</li>
 			
-			<li class="media mb-4">
-				<div class="media-body">
-					<h5 class="mt-0 mb-1"><a href="/blog/2020-11-21-apachecon-obs-storage/">[Video] The history of distributed tracing storage</a></h5>
-					<p class="mb-2 mb-md-3"><small class="text-muted">Saturday, November 21, 2020 in Blog</small></p>
-					
-
-
-
-
-
-					<p class="pt-0 mt-0">Over the past few years, and coupled with the growing adoption of microservices, distributed tracing has emerged as one of the most commonly used monitoring and troubleshooting methodologies. New tracing tools are increasingly being introduced, …</p>
-					<p class="pt-0 mt-0">ApacheCon@Home 2020 Observability Track</p>
-					<p class="pt-0"><a href="/blog/2020-11-21-apachecon-obs-storage/">Read more</a></p>
-				</div>
-			</li>
-			
 		</ul>
 		
 	</div>
@@ -389,7 +389,7 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -419,7 +419,7 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -469,7 +469,7 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/blog/index.xml b/blog/index.xml
index 3a290e8..4d08ecc 100644
--- a/blog/index.xml
+++ b/blog/index.xml
@@ -14,6 +14,64 @@
     
     
     <item>
+      <title>Blog: Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</title>
+      <link>/blog/2021-02-09-skywalking-trace-threadpool/</link>
+      <pubDate>Tue, 09 Feb 2021 00:00:00 +0000</pubDate>
+      
+      <guid>/blog/2021-02-09-skywalking-trace-threadpool/</guid>
+      <description>
+        
+        
+        &lt;p&gt;When using SkyWalking java agent, people usually propagate context easily. They even do not need to change the business
+code. However, it becomes harder when you want to propagate context between threads when using ThreadPoolExecutor.
+You can use the RunnableWrapper in the maven artifact org.apache.skywalking:apm-toolkit-trace. This way you must change
+your code. The developer manager usually don&amp;rsquo;t like this because there may be lots of projects, or lots of runnable code.
+If they don&amp;rsquo;t use SkyWalking some day, the code added will be superfluous and inelegant.&lt;/p&gt;
+&lt;p&gt;Is there a way to propagate context without changing the business code? Yes.&lt;/p&gt;
+&lt;p&gt;Skywalking java agent enhances a class by add a field and implement an interface. The ThreadPoolExecutor is a special
+class that is used widely. We even don&amp;rsquo;t know when and where it is loaded. Most JVMs do not allow changes in the class
+file format for classes that have been loaded previously. So SkyWalking should not enhance the ThreadPoolExecutor successfully by retransforming when the ThreadPoolExecutor has been loaded.
+However, we can apply advice to the ThreadPoolExecutor#execute method and wrap the Runnable param using our
+own agent, then enhance the wrapper class by SkyWalking java agent. An advice do not change the layout of a class.&lt;/p&gt;
+&lt;p&gt;Now we should decide how to do this. You can use the RunnableWrapper in the maven artifact
+org.apache.skywalking:apm-toolkit-trace to wrap the param, but you need to face another problem. This RunnableWrapper
+has a plugin whose active condition is checking if there is @TraceCrossThread. Agent core uses net.bytebuddy.pool.TypePool.Default.WithLazyResolution.LazyTypeDescription to find the annotations
+of a class. The LazyTypeDescription finds annotations by using a URLClassLoader with no urls if the classloader is
+null(bootstrap classloader). So it can not find the @TraceCrossThread class unless you change the LocationStrategy of
+SkyWalking java agent builder.&lt;/p&gt;
+&lt;p&gt;In &lt;a href=&#34;https://github.com/libinglong/skywalking-threadpool-agent&#34;&gt;this project&lt;/a&gt;, I write my own wrapper class,
+and simply add a plugin with a name match condition.
+Next, Let me show you how these two agents work together.&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;
+&lt;p&gt;Move the plugin to the skywalking &amp;ldquo;plugins&amp;rdquo; directory.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;plugin.png&#34; alt=&#34;plugin&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;sky-plugins.png&#34; alt=&#34;plugins directory&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;Add this agent after the SkyWalking agent since the wrapper class should not be loaded before
+SkyWalking agent instrumentation have finished. For example,&lt;/p&gt;
+&lt;blockquote&gt;
+&lt;p&gt;java -javaagent:/path/to/skywalking-agent.jar -javaagent:/path/to/skywalking-tool-agent-v1.0.0.jar &amp;hellip;&lt;/p&gt;
+&lt;/blockquote&gt;
+&lt;p&gt;&lt;img src=&#34;agent.png&#34; alt=&#34;agent.png&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;When our application runs&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;SkyWalking java agent adds a transformer by parsing the plugin for enhancing the wrapper class in the tool agent.&lt;/li&gt;
+&lt;li&gt;The tool agent loads the wrapper class into bootstrap classloader. This triggers the previous transformer.&lt;/li&gt;
+&lt;li&gt;The tool agent applies an advice to the ThreadPoolExecutor class, wrapping the java.lang.Runnable param of &amp;ldquo;execute&amp;rdquo; method with the wrapper class.&lt;/li&gt;
+&lt;li&gt;Now SkyWalking propagates the context with the wrapper class.&lt;/li&gt;
+&lt;/ul&gt;
+&lt;/li&gt;
+&lt;/ul&gt;
+&lt;p&gt;Enjoy tracing with ThreadPoolExecutor in SkyWalking!&lt;/p&gt;
+
+      </description>
+    </item>
+    
+    <item>
       <title>Blog: SkyWalking 8.4 provides infrastructure monitoring</title>
       <link>/blog/2021-02-07-infrastructure-monitoring/</link>
       <pubDate>Mon, 08 Feb 2021 00:00:00 +0000</pubDate>
diff --git a/blog/page/2/index.html b/blog/page/2/index.html
index 15dd182..37643b0 100644
--- a/blog/page/2/index.html
+++ b/blog/page/2/index.html
@@ -172,6 +172,22 @@ if (!doNotTrack) {
 			
 			<li class="media mb-4">
 				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/2020-11-21-apachecon-obs-storage/">[Video] The history of distributed tracing storage</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Saturday, November 21, 2020 in Blog</small></p>
+					
+
+
+
+
+
+					<p class="pt-0 mt-0">Over the past few years, and coupled with the growing adoption of microservices, distributed tracing has emerged as one of the most commonly used monitoring and troubleshooting methodologies. New tracing tools are increasingly being introduced, …</p>
+					<p class="pt-0 mt-0">ApacheCon@Home 2020 Observability Track</p>
+					<p class="pt-0"><a href="/blog/2020-11-21-apachecon-obs-storage/">Read more</a></p>
+				</div>
+			</li>
+			
+			<li class="media mb-4">
+				<div class="media-body">
 					<h5 class="mt-0 mb-1"><a href="/blog/2020-11-21-apachecon-obs-sourcemarker/">[Video] SourceMarker - Continuous Feedback for Developers</a></h5>
 					<p class="mb-2 mb-md-3"><small class="text-muted">Saturday, November 21, 2020 in Blog</small></p>
 					
@@ -315,22 +331,6 @@ This post introduces a way to automatically profile code in production with Apac
 				</div>
 			</li>
 			
-			<li class="media mb-4">
-				<div class="media-body">
-					<h5 class="mt-0 mb-1"><a href="/blog/2020-01-20-celebrate-200th-contributor/">SkyWalking hits 200 contributors mark</a></h5>
-					<p class="mb-2 mb-md-3"><small class="text-muted">Monday, January 20, 2020 in Blog</small></p>
-					
-
-
-
-
-
-					<p class="pt-0 mt-0"> Author: Wu Sheng, tetrate.io, SkyWalking original creator, SkyWalking V.P. GitHub, Twitter, Linkedin  The SkyWalking project provides distributed tracing, topology map analysis, service mesh telemetry analysis, metrics analysis and a super cool …</p>
-					<p class="pt-0 mt-0"> SkyWalking community joins the 200&#43; contributors open source club.</p>
-					<p class="pt-0"><a href="/blog/2020-01-20-celebrate-200th-contributor/">Read more</a></p>
-				</div>
-			</li>
-			
 		</ul>
 		
 	</div>
@@ -378,7 +378,7 @@ This post introduces a way to automatically profile code in production with Apac
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -408,7 +408,7 @@ This post introduces a way to automatically profile code in production with Apac
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -458,7 +458,7 @@ This post introduces a way to automatically profile code in production with Apac
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/blog/page/3/index.html b/blog/page/3/index.html
index b3ad101..e923f31 100644
--- a/blog/page/3/index.html
+++ b/blog/page/3/index.html
@@ -167,6 +167,27 @@ if (!doNotTrack) {
 <div class="row">
 	<div class="col-12">
 		
+		<h2>Posts in 2020</h2>
+		<ul class="list-unstyled mt-4">
+			
+			<li class="media mb-4">
+				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/2020-01-20-celebrate-200th-contributor/">SkyWalking hits 200 contributors mark</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Monday, January 20, 2020 in Blog</small></p>
+					
+
+
+
+
+
+					<p class="pt-0 mt-0"> Author: Wu Sheng, tetrate.io, SkyWalking original creator, SkyWalking V.P. GitHub, Twitter, Linkedin  The SkyWalking project provides distributed tracing, topology map analysis, service mesh telemetry analysis, metrics analysis and a super cool …</p>
+					<p class="pt-0 mt-0"> SkyWalking community joins the 200&#43; contributors open source club.</p>
+					<p class="pt-0"><a href="/blog/2020-01-20-celebrate-200th-contributor/">Read more</a></p>
+				</div>
+			</li>
+			
+		</ul>
+		
 		<h2>Posts in 2019</h2>
 		<ul class="list-unstyled mt-4">
 			
@@ -307,7 +328,7 @@ In many big systems, distributed and especially microservice architectures becom
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -337,7 +358,7 @@ In many big systems, distributed and especially microservice architectures becom
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -387,7 +408,7 @@ In many big systems, distributed and especially microservice architectures becom
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/blog/skywalking8-4-release/index.html b/blog/skywalking8-4-release/index.html
index ce8480f..d72b3dd 100644
--- a/blog/skywalking8-4-release/index.html
+++ b/blog/skywalking8-4-release/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/skywalking8-4-release/" />
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-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Apache SkyWalking 8.4: Logs, VM Monitoring, and Dynamic Configurations at Agent Side">
 <meta itemprop="description" content="Logs, VM Monitoring, and Dynamic Configurations at Agent Side">
 <meta itemprop="datePublished" content="2021-02-05T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="wordCount" content="631">
 
 
@@ -268,7 +268,7 @@ Figure 5: Grouped Service Topology</p>
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -298,7 +298,7 @@ Figure 5: Grouped Service Topology</p>
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -348,7 +348,7 @@ Figure 5: Grouped Service Topology</p>
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/events/release-apache-skwaylking-apm-8-3-0/index.html b/events/release-apache-skwaylking-apm-8-3-0/index.html
index 9145fcc..617c6fc 100644
--- a/events/release-apache-skwaylking-apm-8-3-0/index.html
+++ b/events/release-apache-skwaylking-apm-8-3-0/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/events/release-apache-skwaylking-apm-8-3-0/" />
 <meta property="article:published_time" content="2020-12-02T00:00:00+00:00" />
-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Release Apache SkyWalking APM 8.3.0">
 <meta itemprop="description" content="Release Apache SkyWalking 8.3.0.">
 <meta itemprop="datePublished" content="2020-12-02T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
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diff --git a/events/release-apache-skywalking-5-0-0-beta/index.html b/events/release-apache-skywalking-5-0-0-beta/index.html
index 0eba1eb..7502dd5 100644
--- a/events/release-apache-skywalking-5-0-0-beta/index.html
+++ b/events/release-apache-skywalking-5-0-0-beta/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/events/release-apache-skywalking-5-0-0-beta/" />
 <meta property="article:published_time" content="2018-05-23T00:00:00+00:00" />
-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Release Apache SkyWalking 5.0.0-beta">
 <meta itemprop="description" content="5.0.0-beta release. Go to downloads page to find release tars.">
 <meta itemprop="datePublished" content="2018-05-23T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
+<meta itemprop="dateModified" content="2021-02-09T14:17:09+08:00" />
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diff --git a/events/release-apache-skywalking-5-0-0-beta2/index.html b/events/release-apache-skywalking-5-0-0-beta2/index.html
index 291d7c1..224ec7c 100644
--- a/events/release-apache-skywalking-5-0-0-beta2/index.html
+++ b/events/release-apache-skywalking-5-0-0-beta2/index.html
@@ -24,11 +24,11 @@
 <meta property="og:type" content="article" />
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 <meta itemprop="name" content="Welcome Yixiong Cao as a new committer">
 <meta itemprop="description" content="Based on his contributions to the project, he has been accepted as SkyWalking committer. Welcome aboard.">
 <meta itemprop="datePublished" content="2018-12-10T00:00:00+00:00" />
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index e145f73..d992cb3 100644
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-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Welcome Yuguang Zhao as a new committer">
 <meta itemprop="description" content="Based on his continuous contributions, he has been accepted as a new committer.">
 <meta itemprop="datePublished" content="2019-04-15T00:00:00+00:00" />
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+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Welcome Yuguang Zhao to join the PMC">
 <meta itemprop="description" content="Based on his continuous contributions, Yuguang Zhao (a.k.a zhaoyuguang) has been invited to join the PMC. Welcome aboard.">
 <meta itemprop="datePublished" content="2019-08-27T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
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diff --git a/events/welcome-zhenxu-ke-as-a-new-committer/index.html b/events/welcome-zhenxu-ke-as-a-new-committer/index.html
index e416c3a..537431e 100644
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+++ b/events/welcome-zhenxu-ke-as-a-new-committer/index.html
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-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Welcome Zhenxu Ke as a new committer">
 <meta itemprop="description" content="Based on his continuous contributions, Zhenxu Ke (a.k.a kezhenxu94) has been voted as a new committer.">
 <meta itemprop="datePublished" content="2019-06-17T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
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diff --git a/events/welcome-zhenxu-ke-to-join-the-pmc/index.html b/events/welcome-zhenxu-ke-to-join-the-pmc/index.html
index 0273365..e5d50b2 100644
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 <meta itemprop="description" content="Based on his continuous contributions, Zhenxu Ke (a.k.a kezhenxu94) has been invited to join the PMC. Welcome aboard.">
 <meta itemprop="datePublished" content="2019-08-23T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
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diff --git a/events/welcome-zhusheng-xu-as-new-committer/index.html b/events/welcome-zhusheng-xu-as-new-committer/index.html
index 95f8187..feb4e87 100644
--- a/events/welcome-zhusheng-xu-as-new-committer/index.html
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 <meta itemprop="name" content="Welcome Zhusheng Xu as new committer">
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 <meta itemprop="datePublished" content="2020-02-21T00:00:00+00:00" />
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diff --git a/false/index.html b/false/index.html
index 53544ec..12c6882 100644
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@@ -173,7 +173,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
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+            <span class="count">3</span>
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diff --git a/index.json b/index.json
index 39c7096..1ad4cdd 100644
--- a/index.json
+++ b/index.json
@@ -1 +1 @@
-[{"body":"SkyWalking CLI 0.6.0 is released. Go to downloads page to find release tars.\n  Features\n Support authorization when connecting to the OAP Add install command and manifest sub-command Add event command and report sub-command    Bug Fixes\n Fix the bug that can\u0026rsquo;t query JVM instance metrics    Chores\n Set up a simple test with GitHub Actions Reorganize the project layout Update year in NOTICE Add missing license of swck Use license-eye to check license header    ","e [...]
\ No newline at end of file
+[{"body":"","excerpt":"","ref":"/tags/agent/","title":"Agent"},{"body":"When using SkyWalking java agent, people usually propagate context easily. They even do not need to change the business code. However, it becomes harder when you want to propagate context between threads when using ThreadPoolExecutor. You can use the RunnableWrapper in the maven artifact org.apache.skywalking:apm-toolkit-trace. This way you must change your code. The developer manager usually don\u0026rsquo;t like th [...]
\ No newline at end of file
diff --git a/index.xml b/index.xml
index 5a47658..388b048 100644
--- a/index.xml
+++ b/index.xml
@@ -13,6 +13,64 @@
     
     
     <item>
+      <title>Blog: Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</title>
+      <link>/blog/2021-02-09-skywalking-trace-threadpool/</link>
+      <pubDate>Tue, 09 Feb 2021 00:00:00 +0000</pubDate>
+      
+      <guid>/blog/2021-02-09-skywalking-trace-threadpool/</guid>
+      <description>
+        
+        
+        &lt;p&gt;When using SkyWalking java agent, people usually propagate context easily. They even do not need to change the business
+code. However, it becomes harder when you want to propagate context between threads when using ThreadPoolExecutor.
+You can use the RunnableWrapper in the maven artifact org.apache.skywalking:apm-toolkit-trace. This way you must change
+your code. The developer manager usually don&amp;rsquo;t like this because there may be lots of projects, or lots of runnable code.
+If they don&amp;rsquo;t use SkyWalking some day, the code added will be superfluous and inelegant.&lt;/p&gt;
+&lt;p&gt;Is there a way to propagate context without changing the business code? Yes.&lt;/p&gt;
+&lt;p&gt;Skywalking java agent enhances a class by add a field and implement an interface. The ThreadPoolExecutor is a special
+class that is used widely. We even don&amp;rsquo;t know when and where it is loaded. Most JVMs do not allow changes in the class
+file format for classes that have been loaded previously. So SkyWalking should not enhance the ThreadPoolExecutor successfully by retransforming when the ThreadPoolExecutor has been loaded.
+However, we can apply advice to the ThreadPoolExecutor#execute method and wrap the Runnable param using our
+own agent, then enhance the wrapper class by SkyWalking java agent. An advice do not change the layout of a class.&lt;/p&gt;
+&lt;p&gt;Now we should decide how to do this. You can use the RunnableWrapper in the maven artifact
+org.apache.skywalking:apm-toolkit-trace to wrap the param, but you need to face another problem. This RunnableWrapper
+has a plugin whose active condition is checking if there is @TraceCrossThread. Agent core uses net.bytebuddy.pool.TypePool.Default.WithLazyResolution.LazyTypeDescription to find the annotations
+of a class. The LazyTypeDescription finds annotations by using a URLClassLoader with no urls if the classloader is
+null(bootstrap classloader). So it can not find the @TraceCrossThread class unless you change the LocationStrategy of
+SkyWalking java agent builder.&lt;/p&gt;
+&lt;p&gt;In &lt;a href=&#34;https://github.com/libinglong/skywalking-threadpool-agent&#34;&gt;this project&lt;/a&gt;, I write my own wrapper class,
+and simply add a plugin with a name match condition.
+Next, Let me show you how these two agents work together.&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;
+&lt;p&gt;Move the plugin to the skywalking &amp;ldquo;plugins&amp;rdquo; directory.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;plugin.png&#34; alt=&#34;plugin&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;sky-plugins.png&#34; alt=&#34;plugins directory&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;Add this agent after the SkyWalking agent since the wrapper class should not be loaded before
+SkyWalking agent instrumentation have finished. For example,&lt;/p&gt;
+&lt;blockquote&gt;
+&lt;p&gt;java -javaagent:/path/to/skywalking-agent.jar -javaagent:/path/to/skywalking-tool-agent-v1.0.0.jar &amp;hellip;&lt;/p&gt;
+&lt;/blockquote&gt;
+&lt;p&gt;&lt;img src=&#34;agent.png&#34; alt=&#34;agent.png&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;When our application runs&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;SkyWalking java agent adds a transformer by parsing the plugin for enhancing the wrapper class in the tool agent.&lt;/li&gt;
+&lt;li&gt;The tool agent loads the wrapper class into bootstrap classloader. This triggers the previous transformer.&lt;/li&gt;
+&lt;li&gt;The tool agent applies an advice to the ThreadPoolExecutor class, wrapping the java.lang.Runnable param of &amp;ldquo;execute&amp;rdquo; method with the wrapper class.&lt;/li&gt;
+&lt;li&gt;Now SkyWalking propagates the context with the wrapper class.&lt;/li&gt;
+&lt;/ul&gt;
+&lt;/li&gt;
+&lt;/ul&gt;
+&lt;p&gt;Enjoy tracing with ThreadPoolExecutor in SkyWalking!&lt;/p&gt;
+
+      </description>
+    </item>
+    
+    <item>
       <title>Blog: SkyWalking 8.4 provides infrastructure monitoring</title>
       <link>/blog/2021-02-07-infrastructure-monitoring/</link>
       <pubDate>Mon, 08 Feb 2021 00:00:00 +0000</pubDate>
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index 1086aa2..f619d36 100644
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diff --git a/sitemap.xml b/sitemap.xml
index b16ce60..eaeec05 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -3,1261 +3,1268 @@
   xmlns:xhtml="http://www.w3.org/1999/xhtml">
   
   <url>
-    <loc>/events/release-apache-skywalking-cli-0-6-0/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <loc>/tags/agent/</loc>
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   <url>
-    <loc>/tags/infrastructure-monitoring/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <loc>/blog/2021-02-09-skywalking-trace-threadpool/</loc>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   <url>
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+    <loc>/tags/java/</loc>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
+    <changefreq>daily</changefreq>
+    <priority>0.5</priority>
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+  
+  <url>
+    <loc>/events/release-apache-skywalking-cli-0-6-0/</loc>
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+    <changefreq>daily</changefreq>
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+  
+  <url>
+    <loc>/tags/tracing/</loc>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
+    <changefreq>daily</changefreq>
+    <priority>0.5</priority>
+  </url>
+  
+  <url>
+    <loc>/tags/infrastructure-monitoring/</loc>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
+    <changefreq>daily</changefreq>
+    <priority>0.5</priority>
+  </url>
+  
+  <url>
+    <loc>/blog/2021-02-07-infrastructure-monitoring/</loc>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/blog/skywalking8-4-release/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/tags/logs/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   <url>
     <loc>/tags/release-blog/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   <url>
     <loc>/events/release-apache-skywalking-apm-8-4-0/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/blog/2021-02-01-e2e-verifier-design/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/tags/testing/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/events/release-apache-skywalking-cloud-on-kubernetes-0-2-0/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   <url>
     <loc>/blog/2021-01-23-tencent-cloud-violates-aplv2/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/zh/2021-01-21-educate-community/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
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   <url>
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   <url>
     <loc>/zh_tags/video/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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   <url>
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   <url>
     <loc>/blog/2021-01-17-elastic-change-license/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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   <url>
     <loc>/events/release-apache-skywalking-client-js-0-3-0/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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   <url>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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     <changefreq>daily</changefreq>
     <priority>0.5</priority>
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   <url>
     <loc>/events/release-apache-skywalking-nodejs-0-1-0/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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   <url>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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   <url>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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     <changefreq>daily</changefreq>
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   </url>
   
   <url>
     <loc>/zh_tags/web-ui/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   <url>
     <loc>/events/welcome-yixiong-cao-as-a-new-committer/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   <url>
     <loc>/blog/2018-12-12-skywalking-service-mesh-ready/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
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   <url>
     <loc>/events/welcome-jian-tan-as-a-new-committer/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
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   <url>
     <loc>/events/release-apache-skywalking-6-0-0-alpha/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/events/release-apache-skywalking-5-0-0-ga/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   <url>
     <loc>/events/release-apache-skywalking-5-0-0-rc2/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/events/release-apache-skywalking-5-0-0-beta2/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
     <priority>0.5</priority>
   </url>
   
   <url>
     <loc>/blog/2018-05-24-skywalking-net/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
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   <url>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
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   </url>
   
   <url>
     <loc>/zh_tags/dotnetcore/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
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   </url>
   
   <url>
     <loc>/tags/dotnetcore/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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   <url>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   </url>
   
   <url>
     <loc>/index.json</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   </url>
   
   <url>
     <loc>/blog/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   </url>
   
   <url>
     <loc>/docs/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   </url>
   
   <url>
     <loc>/downloads/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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   <url>
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-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
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     <changefreq>daily</changefreq>
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@@ -1270,7 +1277,7 @@
   
   <url>
     <loc>/search/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
     <changefreq>daily</changefreq>
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@@ -1283,7 +1290,7 @@
   
   <url>
     <loc>/team/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
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@@ -1296,7 +1303,7 @@
   
   <url>
     <loc>/zh/</loc>
-    <lastmod>2021-02-09T10:24:09+08:00</lastmod>
+    <lastmod>2021-02-09T14:17:09+08:00</lastmod>
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diff --git a/tags/agent/index.html b/tags/agent/index.html
index 0075cfe..aac88f8 100644
--- a/tags/agent/index.html
+++ b/tags/agent/index.html
@@ -24,7 +24,7 @@
 <meta property="og:description" content="" />
 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/agent/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Agent">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -168,6 +168,41 @@ if (!doNotTrack) {
 <div class="row">
     <div class="col-12">
         
+        <h2>Posts in 2021</h2>
+
+        <ul class="list-unstyled mt-4">
+            
+            <li class="media mb-4">
+                <div class="media-body">
+                    <h5 class="mt-0 mb-1"><a href="/blog/2021-02-09-skywalking-trace-threadpool/">Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</a></h5>
+                    <p class="mb-2 mb-md-3"><small class="text-muted">Tuesday, February 09, 2021 in Blog</small>
+
+                        
+                        <small class="mt-1 tags-box">  |
+                        
+                        <span><a href="/tags/java" class="tag-link">Java</a></span>
+                        
+                        <span><a href="/tags/agent" class="tag-link">Agent</a></span>
+                        
+                        <span><a href="/tags/tracing" class="tag-link">Tracing</a></span>
+                        
+                        </small>
+                        
+
+                    </p>
+                    
+
+
+
+
+
+                    <p class="pt-0 mt-0">This post introduces how to propagate context between threads when using ThreadPoolExecutor, which SkyWalking agent should not enhance</p>
+                    <p class="pt-0"><a href="/blog/2021-02-09-skywalking-trace-threadpool/">Read more</a></p>
+                </div>
+            </li>
+            
+        </ul>
+        
         <h2>Posts in 2020</h2>
 
         <ul class="list-unstyled mt-4">
@@ -261,7 +296,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
@@ -291,7 +326,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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@@ -341,7 +376,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/agent/index.xml b/tags/agent/index.xml
index 72f8afa..70631ea 100644
--- a/tags/agent/index.xml
+++ b/tags/agent/index.xml
@@ -4,7 +4,7 @@
     <link>/tags/agent/</link>
     <description>Recent content in Agent on Apache SkyWalking</description>
     <generator>Hugo -- gohugo.io</generator>
-    <lastBuildDate>Mon, 13 Apr 2020 00:00:00 +0000</lastBuildDate>
+    <lastBuildDate>Tue, 09 Feb 2021 00:00:00 +0000</lastBuildDate>
     
 	  <atom:link href="/tags/agent/index.xml" rel="self" type="application/rss+xml" />
     
@@ -15,6 +15,64 @@
     
     
     <item>
+      <title>Blog: Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</title>
+      <link>/blog/2021-02-09-skywalking-trace-threadpool/</link>
+      <pubDate>Tue, 09 Feb 2021 00:00:00 +0000</pubDate>
+      
+      <guid>/blog/2021-02-09-skywalking-trace-threadpool/</guid>
+      <description>
+        
+        
+        &lt;p&gt;When using SkyWalking java agent, people usually propagate context easily. They even do not need to change the business
+code. However, it becomes harder when you want to propagate context between threads when using ThreadPoolExecutor.
+You can use the RunnableWrapper in the maven artifact org.apache.skywalking:apm-toolkit-trace. This way you must change
+your code. The developer manager usually don&amp;rsquo;t like this because there may be lots of projects, or lots of runnable code.
+If they don&amp;rsquo;t use SkyWalking some day, the code added will be superfluous and inelegant.&lt;/p&gt;
+&lt;p&gt;Is there a way to propagate context without changing the business code? Yes.&lt;/p&gt;
+&lt;p&gt;Skywalking java agent enhances a class by add a field and implement an interface. The ThreadPoolExecutor is a special
+class that is used widely. We even don&amp;rsquo;t know when and where it is loaded. Most JVMs do not allow changes in the class
+file format for classes that have been loaded previously. So SkyWalking should not enhance the ThreadPoolExecutor successfully by retransforming when the ThreadPoolExecutor has been loaded.
+However, we can apply advice to the ThreadPoolExecutor#execute method and wrap the Runnable param using our
+own agent, then enhance the wrapper class by SkyWalking java agent. An advice do not change the layout of a class.&lt;/p&gt;
+&lt;p&gt;Now we should decide how to do this. You can use the RunnableWrapper in the maven artifact
+org.apache.skywalking:apm-toolkit-trace to wrap the param, but you need to face another problem. This RunnableWrapper
+has a plugin whose active condition is checking if there is @TraceCrossThread. Agent core uses net.bytebuddy.pool.TypePool.Default.WithLazyResolution.LazyTypeDescription to find the annotations
+of a class. The LazyTypeDescription finds annotations by using a URLClassLoader with no urls if the classloader is
+null(bootstrap classloader). So it can not find the @TraceCrossThread class unless you change the LocationStrategy of
+SkyWalking java agent builder.&lt;/p&gt;
+&lt;p&gt;In &lt;a href=&#34;https://github.com/libinglong/skywalking-threadpool-agent&#34;&gt;this project&lt;/a&gt;, I write my own wrapper class,
+and simply add a plugin with a name match condition.
+Next, Let me show you how these two agents work together.&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;
+&lt;p&gt;Move the plugin to the skywalking &amp;ldquo;plugins&amp;rdquo; directory.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;plugin.png&#34; alt=&#34;plugin&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;sky-plugins.png&#34; alt=&#34;plugins directory&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;Add this agent after the SkyWalking agent since the wrapper class should not be loaded before
+SkyWalking agent instrumentation have finished. For example,&lt;/p&gt;
+&lt;blockquote&gt;
+&lt;p&gt;java -javaagent:/path/to/skywalking-agent.jar -javaagent:/path/to/skywalking-tool-agent-v1.0.0.jar &amp;hellip;&lt;/p&gt;
+&lt;/blockquote&gt;
+&lt;p&gt;&lt;img src=&#34;agent.png&#34; alt=&#34;agent.png&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;When our application runs&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;SkyWalking java agent adds a transformer by parsing the plugin for enhancing the wrapper class in the tool agent.&lt;/li&gt;
+&lt;li&gt;The tool agent loads the wrapper class into bootstrap classloader. This triggers the previous transformer.&lt;/li&gt;
+&lt;li&gt;The tool agent applies an advice to the ThreadPoolExecutor class, wrapping the java.lang.Runnable param of &amp;ldquo;execute&amp;rdquo; method with the wrapper class.&lt;/li&gt;
+&lt;li&gt;Now SkyWalking propagates the context with the wrapper class.&lt;/li&gt;
+&lt;/ul&gt;
+&lt;/li&gt;
+&lt;/ul&gt;
+&lt;p&gt;Enjoy tracing with ThreadPoolExecutor in SkyWalking!&lt;/p&gt;
+
+      </description>
+    </item>
+    
+    <item>
       <title>Blog: Apache SkyWalking: Use Profiling to Fix the Blind Spot of Distributed Tracing</title>
       <link>/blog/2020-04-13-apache-skywalking-profiling/</link>
       <pubDate>Mon, 13 Apr 2020 00:00:00 +0000</pubDate>
diff --git a/tags/browser/index.html b/tags/browser/index.html
index a189c94..a9e88aa 100644
--- a/tags/browser/index.html
+++ b/tags/browser/index.html
@@ -24,7 +24,7 @@
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 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/browser/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Browser">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -224,7 +224,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -254,7 +254,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -304,7 +304,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/conference/index.html b/tags/conference/index.html
index 8622a73..82cf3a6 100644
--- a/tags/conference/index.html
+++ b/tags/conference/index.html
@@ -24,7 +24,7 @@
 <meta property="og:description" content="" />
 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/conference/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Conference">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -332,7 +332,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -362,7 +362,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -412,7 +412,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/design/index.html b/tags/design/index.html
index 5132ee3..9360bbc 100644
--- a/tags/design/index.html
+++ b/tags/design/index.html
@@ -24,7 +24,7 @@
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 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/design/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Design">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -224,7 +224,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -254,7 +254,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -304,7 +304,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/dotnetcore/index.html b/tags/dotnetcore/index.html
index fdce09e..a7b1e84 100644
--- a/tags/dotnetcore/index.html
+++ b/tags/dotnetcore/index.html
@@ -24,7 +24,7 @@
 <meta property="og:description" content="" />
 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/dotnetcore/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="DotNetCore">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -224,7 +224,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -254,7 +254,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -304,7 +304,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/index.html b/tags/index.html
index b371289..7b2a7ac 100644
--- a/tags/index.html
+++ b/tags/index.html
@@ -24,7 +24,7 @@
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 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Tags">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -173,7 +173,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
@@ -203,7 +203,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -253,7 +253,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/index.xml b/tags/index.xml
index acfa0e1..1978c7f 100644
--- a/tags/index.xml
+++ b/tags/index.xml
@@ -4,7 +4,7 @@
     <link>/tags/</link>
     <description>Recent content in Tags on Apache SkyWalking</description>
     <generator>Hugo -- gohugo.io</generator>
-    <lastBuildDate>Mon, 08 Feb 2021 00:00:00 +0000</lastBuildDate>
+    <lastBuildDate>Tue, 09 Feb 2021 00:00:00 +0000</lastBuildDate>
     
 	  <atom:link href="/tags/index.xml" rel="self" type="application/rss+xml" />
     
diff --git a/tags/infrastructure-monitoring/index.html b/tags/infrastructure-monitoring/index.html
index a2992ad..887f548 100644
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+++ b/tags/infrastructure-monitoring/index.html
@@ -24,7 +24,7 @@
 <meta property="og:description" content="" />
 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/infrastructure-monitoring/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Infrastructure Monitoring">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -222,7 +222,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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@@ -252,7 +252,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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         <li>
@@ -302,7 +302,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/java/index.html b/tags/java/index.html
index a4abe11..27fd5b3 100644
--- a/tags/java/index.html
+++ b/tags/java/index.html
@@ -24,7 +24,7 @@
 <meta property="og:description" content="" />
 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/java/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Java">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -168,6 +168,41 @@ if (!doNotTrack) {
 <div class="row">
     <div class="col-12">
         
+        <h2>Posts in 2021</h2>
+
+        <ul class="list-unstyled mt-4">
+            
+            <li class="media mb-4">
+                <div class="media-body">
+                    <h5 class="mt-0 mb-1"><a href="/blog/2021-02-09-skywalking-trace-threadpool/">Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</a></h5>
+                    <p class="mb-2 mb-md-3"><small class="text-muted">Tuesday, February 09, 2021 in Blog</small>
+
+                        
+                        <small class="mt-1 tags-box">  |
+                        
+                        <span><a href="/tags/java" class="tag-link">Java</a></span>
+                        
+                        <span><a href="/tags/agent" class="tag-link">Agent</a></span>
+                        
+                        <span><a href="/tags/tracing" class="tag-link">Tracing</a></span>
+                        
+                        </small>
+                        
+
+                    </p>
+                    
+
+
+
+
+
+                    <p class="pt-0 mt-0">This post introduces how to propagate context between threads when using ThreadPoolExecutor, which SkyWalking agent should not enhance</p>
+                    <p class="pt-0"><a href="/blog/2021-02-09-skywalking-trace-threadpool/">Read more</a></p>
+                </div>
+            </li>
+            
+        </ul>
+        
         <h2>Posts in 2020</h2>
 
         <ul class="list-unstyled mt-4">
@@ -228,7 +263,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
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@@ -258,7 +293,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
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         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
diff --git a/tags/java/index.xml b/tags/java/index.xml
index 2aabd34..517360b 100644
--- a/tags/java/index.xml
+++ b/tags/java/index.xml
@@ -4,7 +4,7 @@
     <link>/tags/java/</link>
     <description>Recent content in Java on Apache SkyWalking</description>
     <generator>Hugo -- gohugo.io</generator>
-    <lastBuildDate>Mon, 13 Apr 2020 00:00:00 +0000</lastBuildDate>
+    <lastBuildDate>Tue, 09 Feb 2021 00:00:00 +0000</lastBuildDate>
     
 	  <atom:link href="/tags/java/index.xml" rel="self" type="application/rss+xml" />
     
@@ -15,6 +15,64 @@
     
     
     <item>
+      <title>Blog: Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</title>
+      <link>/blog/2021-02-09-skywalking-trace-threadpool/</link>
+      <pubDate>Tue, 09 Feb 2021 00:00:00 +0000</pubDate>
+      
+      <guid>/blog/2021-02-09-skywalking-trace-threadpool/</guid>
+      <description>
+        
+        
+        &lt;p&gt;When using SkyWalking java agent, people usually propagate context easily. They even do not need to change the business
+code. However, it becomes harder when you want to propagate context between threads when using ThreadPoolExecutor.
+You can use the RunnableWrapper in the maven artifact org.apache.skywalking:apm-toolkit-trace. This way you must change
+your code. The developer manager usually don&amp;rsquo;t like this because there may be lots of projects, or lots of runnable code.
+If they don&amp;rsquo;t use SkyWalking some day, the code added will be superfluous and inelegant.&lt;/p&gt;
+&lt;p&gt;Is there a way to propagate context without changing the business code? Yes.&lt;/p&gt;
+&lt;p&gt;Skywalking java agent enhances a class by add a field and implement an interface. The ThreadPoolExecutor is a special
+class that is used widely. We even don&amp;rsquo;t know when and where it is loaded. Most JVMs do not allow changes in the class
+file format for classes that have been loaded previously. So SkyWalking should not enhance the ThreadPoolExecutor successfully by retransforming when the ThreadPoolExecutor has been loaded.
+However, we can apply advice to the ThreadPoolExecutor#execute method and wrap the Runnable param using our
+own agent, then enhance the wrapper class by SkyWalking java agent. An advice do not change the layout of a class.&lt;/p&gt;
+&lt;p&gt;Now we should decide how to do this. You can use the RunnableWrapper in the maven artifact
+org.apache.skywalking:apm-toolkit-trace to wrap the param, but you need to face another problem. This RunnableWrapper
+has a plugin whose active condition is checking if there is @TraceCrossThread. Agent core uses net.bytebuddy.pool.TypePool.Default.WithLazyResolution.LazyTypeDescription to find the annotations
+of a class. The LazyTypeDescription finds annotations by using a URLClassLoader with no urls if the classloader is
+null(bootstrap classloader). So it can not find the @TraceCrossThread class unless you change the LocationStrategy of
+SkyWalking java agent builder.&lt;/p&gt;
+&lt;p&gt;In &lt;a href=&#34;https://github.com/libinglong/skywalking-threadpool-agent&#34;&gt;this project&lt;/a&gt;, I write my own wrapper class,
+and simply add a plugin with a name match condition.
+Next, Let me show you how these two agents work together.&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;
+&lt;p&gt;Move the plugin to the skywalking &amp;ldquo;plugins&amp;rdquo; directory.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;plugin.png&#34; alt=&#34;plugin&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;sky-plugins.png&#34; alt=&#34;plugins directory&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;Add this agent after the SkyWalking agent since the wrapper class should not be loaded before
+SkyWalking agent instrumentation have finished. For example,&lt;/p&gt;
+&lt;blockquote&gt;
+&lt;p&gt;java -javaagent:/path/to/skywalking-agent.jar -javaagent:/path/to/skywalking-tool-agent-v1.0.0.jar &amp;hellip;&lt;/p&gt;
+&lt;/blockquote&gt;
+&lt;p&gt;&lt;img src=&#34;agent.png&#34; alt=&#34;agent.png&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;When our application runs&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;SkyWalking java agent adds a transformer by parsing the plugin for enhancing the wrapper class in the tool agent.&lt;/li&gt;
+&lt;li&gt;The tool agent loads the wrapper class into bootstrap classloader. This triggers the previous transformer.&lt;/li&gt;
+&lt;li&gt;The tool agent applies an advice to the ThreadPoolExecutor class, wrapping the java.lang.Runnable param of &amp;ldquo;execute&amp;rdquo; method with the wrapper class.&lt;/li&gt;
+&lt;li&gt;Now SkyWalking propagates the context with the wrapper class.&lt;/li&gt;
+&lt;/ul&gt;
+&lt;/li&gt;
+&lt;/ul&gt;
+&lt;p&gt;Enjoy tracing with ThreadPoolExecutor in SkyWalking!&lt;/p&gt;
+
+      </description>
+    </item>
+    
+    <item>
       <title>Blog: Apache SkyWalking: Use Profiling to Fix the Blind Spot of Distributed Tracing</title>
       <link>/blog/2020-04-13-apache-skywalking-profiling/</link>
       <pubDate>Mon, 13 Apr 2020 00:00:00 +0000</pubDate>
diff --git a/tags/kafka/index.html b/tags/kafka/index.html
index 55364a7..6a2ea7b 100644
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 <meta property="og:url" content="/tags/kafka/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Kafka">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -226,7 +226,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
@@ -256,7 +256,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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         <li>
@@ -306,7 +306,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/logs/index.html b/tags/logs/index.html
index 6273d70..7bcd786 100644
--- a/tags/logs/index.html
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@@ -24,7 +24,7 @@
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 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/logs/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Logs">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -224,7 +224,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
@@ -254,7 +254,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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         <li>
@@ -304,7 +304,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/performance/index.html b/tags/performance/index.html
index c37d72f..aca227b 100644
--- a/tags/performance/index.html
+++ b/tags/performance/index.html
@@ -24,7 +24,7 @@
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 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/performance/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Performance">
 <meta itemprop="description" content="">
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@@ -224,7 +224,7 @@ if (!doNotTrack) {
         
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-            <span class="count">2</span>
+            <span class="count">3</span>
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@@ -254,7 +254,7 @@ if (!doNotTrack) {
         
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             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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@@ -304,7 +304,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
diff --git a/tags/profiling/index.html b/tags/profiling/index.html
index fc0a503..95ab8c2 100644
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 <meta property="og:url" content="/tags/profiling/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Profiling">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -228,7 +228,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
@@ -258,7 +258,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -308,7 +308,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/release-blog/index.html b/tags/release-blog/index.html
index 4e815a6..9fa26bd 100644
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 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/release-blog/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Release Blog">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -319,7 +319,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
@@ -349,7 +349,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -399,7 +399,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/satellite/index.html b/tags/satellite/index.html
index 8dec7cd..1f14c89 100644
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 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/satellite/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Satellite">
 <meta itemprop="description" content="">
 <meta name="twitter:card" content="summary"/>
@@ -224,7 +224,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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@@ -254,7 +254,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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         <li>
@@ -304,7 +304,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/service-mesh/index.html b/tags/service-mesh/index.html
index 4fef948..3b254a0 100644
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-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
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 <meta itemprop="description" content="">
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@@ -255,7 +255,7 @@ if (!doNotTrack) {
         
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-            <span class="count">2</span>
+            <span class="count">3</span>
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@@ -285,7 +285,7 @@ if (!doNotTrack) {
         
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             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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@@ -335,7 +335,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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diff --git a/tags/spring/index.html b/tags/spring/index.html
index bb2465b..ec265d1 100644
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-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
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 <meta itemprop="description" content="">
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@@ -226,7 +226,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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         <li>
@@ -256,7 +256,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
         </li>
         
         <li>
@@ -306,7 +306,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
         </li>
         
         <li>
diff --git a/tags/testing/index.html b/tags/testing/index.html
index cba1302..0cc8e47 100644
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 <meta property="og:url" content="/tags/testing/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Testing">
 <meta itemprop="description" content="">
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@@ -286,7 +286,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/agent/" class="tag-link">Agent</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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@@ -316,7 +316,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/java/" class="tag-link">Java</a>
-            <span class="count">1</span>
+            <span class="count">2</span>
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@@ -366,7 +366,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
-            <span class="count">2</span>
+            <span class="count">3</span>
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diff --git a/tags/tracing/index.html b/tags/tracing/index.html
index 8982505..4d948f9 100644
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 <meta property="og:description" content="" />
 <meta property="og:type" content="website" />
 <meta property="og:url" content="/tags/tracing/" />
-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
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 <meta name="twitter:card" content="summary"/>
@@ -168,6 +168,41 @@ if (!doNotTrack) {
 <div class="row">
     <div class="col-12">
         
+        <h2>Posts in 2021</h2>
+
+        <ul class="list-unstyled mt-4">
+            
+            <li class="media mb-4">
+                <div class="media-body">
+                    <h5 class="mt-0 mb-1"><a href="/blog/2021-02-09-skywalking-trace-threadpool/">Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</a></h5>
+                    <p class="mb-2 mb-md-3"><small class="text-muted">Tuesday, February 09, 2021 in Blog</small>
+
+                        
+                        <small class="mt-1 tags-box">  |
+                        
+                        <span><a href="/tags/java" class="tag-link">Java</a></span>
+                        
+                        <span><a href="/tags/agent" class="tag-link">Agent</a></span>
+                        
+                        <span><a href="/tags/tracing" class="tag-link">Tracing</a></span>
+                        
+                        </small>
+                        
+
+                    </p>
+                    
+
+
+
+
+
+                    <p class="pt-0 mt-0">This post introduces how to propagate context between threads when using ThreadPoolExecutor, which SkyWalking agent should not enhance</p>
+                    <p class="pt-0"><a href="/blog/2021-02-09-skywalking-trace-threadpool/">Read more</a></p>
+                </div>
+            </li>
+            
+        </ul>
+        
         <h2>Posts in 2020</h2>
 
         <ul class="list-unstyled mt-4">
@@ -259,7 +294,7 @@ if (!doNotTrack) {
         
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             <a href="/tags/agent/" class="tag-link">Agent</a>
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@@ -289,7 +324,7 @@ if (!doNotTrack) {
         
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             <a href="/tags/java/" class="tag-link">Java</a>
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         <li>
             <a href="/tags/tracing/" class="tag-link">Tracing</a>
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         <li>
diff --git a/tags/tracing/index.xml b/tags/tracing/index.xml
index f514dcb..ce262c1 100644
--- a/tags/tracing/index.xml
+++ b/tags/tracing/index.xml
@@ -4,7 +4,7 @@
     <link>/tags/tracing/</link>
     <description>Recent content in Tracing on Apache SkyWalking</description>
     <generator>Hugo -- gohugo.io</generator>
-    <lastBuildDate>Mon, 13 Apr 2020 00:00:00 +0000</lastBuildDate>
+    <lastBuildDate>Tue, 09 Feb 2021 00:00:00 +0000</lastBuildDate>
     
 	  <atom:link href="/tags/tracing/index.xml" rel="self" type="application/rss+xml" />
     
@@ -15,6 +15,64 @@
     
     
     <item>
+      <title>Blog: Apache SkyWalking: How to propagate context between threads when using ThreadPoolExecutor</title>
+      <link>/blog/2021-02-09-skywalking-trace-threadpool/</link>
+      <pubDate>Tue, 09 Feb 2021 00:00:00 +0000</pubDate>
+      
+      <guid>/blog/2021-02-09-skywalking-trace-threadpool/</guid>
+      <description>
+        
+        
+        &lt;p&gt;When using SkyWalking java agent, people usually propagate context easily. They even do not need to change the business
+code. However, it becomes harder when you want to propagate context between threads when using ThreadPoolExecutor.
+You can use the RunnableWrapper in the maven artifact org.apache.skywalking:apm-toolkit-trace. This way you must change
+your code. The developer manager usually don&amp;rsquo;t like this because there may be lots of projects, or lots of runnable code.
+If they don&amp;rsquo;t use SkyWalking some day, the code added will be superfluous and inelegant.&lt;/p&gt;
+&lt;p&gt;Is there a way to propagate context without changing the business code? Yes.&lt;/p&gt;
+&lt;p&gt;Skywalking java agent enhances a class by add a field and implement an interface. The ThreadPoolExecutor is a special
+class that is used widely. We even don&amp;rsquo;t know when and where it is loaded. Most JVMs do not allow changes in the class
+file format for classes that have been loaded previously. So SkyWalking should not enhance the ThreadPoolExecutor successfully by retransforming when the ThreadPoolExecutor has been loaded.
+However, we can apply advice to the ThreadPoolExecutor#execute method and wrap the Runnable param using our
+own agent, then enhance the wrapper class by SkyWalking java agent. An advice do not change the layout of a class.&lt;/p&gt;
+&lt;p&gt;Now we should decide how to do this. You can use the RunnableWrapper in the maven artifact
+org.apache.skywalking:apm-toolkit-trace to wrap the param, but you need to face another problem. This RunnableWrapper
+has a plugin whose active condition is checking if there is @TraceCrossThread. Agent core uses net.bytebuddy.pool.TypePool.Default.WithLazyResolution.LazyTypeDescription to find the annotations
+of a class. The LazyTypeDescription finds annotations by using a URLClassLoader with no urls if the classloader is
+null(bootstrap classloader). So it can not find the @TraceCrossThread class unless you change the LocationStrategy of
+SkyWalking java agent builder.&lt;/p&gt;
+&lt;p&gt;In &lt;a href=&#34;https://github.com/libinglong/skywalking-threadpool-agent&#34;&gt;this project&lt;/a&gt;, I write my own wrapper class,
+and simply add a plugin with a name match condition.
+Next, Let me show you how these two agents work together.&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;
+&lt;p&gt;Move the plugin to the skywalking &amp;ldquo;plugins&amp;rdquo; directory.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;plugin.png&#34; alt=&#34;plugin&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;sky-plugins.png&#34; alt=&#34;plugins directory&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;Add this agent after the SkyWalking agent since the wrapper class should not be loaded before
+SkyWalking agent instrumentation have finished. For example,&lt;/p&gt;
+&lt;blockquote&gt;
+&lt;p&gt;java -javaagent:/path/to/skywalking-agent.jar -javaagent:/path/to/skywalking-tool-agent-v1.0.0.jar &amp;hellip;&lt;/p&gt;
+&lt;/blockquote&gt;
+&lt;p&gt;&lt;img src=&#34;agent.png&#34; alt=&#34;agent.png&#34;&gt;&lt;/p&gt;
+&lt;/li&gt;
+&lt;li&gt;
+&lt;p&gt;When our application runs&lt;/p&gt;
+&lt;ul&gt;
+&lt;li&gt;SkyWalking java agent adds a transformer by parsing the plugin for enhancing the wrapper class in the tool agent.&lt;/li&gt;
+&lt;li&gt;The tool agent loads the wrapper class into bootstrap classloader. This triggers the previous transformer.&lt;/li&gt;
+&lt;li&gt;The tool agent applies an advice to the ThreadPoolExecutor class, wrapping the java.lang.Runnable param of &amp;ldquo;execute&amp;rdquo; method with the wrapper class.&lt;/li&gt;
+&lt;li&gt;Now SkyWalking propagates the context with the wrapper class.&lt;/li&gt;
+&lt;/ul&gt;
+&lt;/li&gt;
+&lt;/ul&gt;
+&lt;p&gt;Enjoy tracing with ThreadPoolExecutor in SkyWalking!&lt;/p&gt;
+
+      </description>
+    </item>
+    
+    <item>
       <title>Blog: Apache SkyWalking: Use Profiling to Fix the Blind Spot of Distributed Tracing</title>
       <link>/blog/2020-04-13-apache-skywalking-profiling/</link>
       <pubDate>Mon, 13 Apr 2020 00:00:00 +0000</pubDate>
diff --git a/tags/user-manual/index.html b/tags/user-manual/index.html
index 162ec02..fb2cc5c 100644
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-<meta property="og:updated_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="og:updated_time" content="2021-02-09T14:17:09+08:00" />
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-            <span class="count">2</span>
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index 6e09a9b..944d400 100644
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-            <span class="count">2</span>
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diff --git a/zh/2018-05-24-skywalking-net/index.html b/zh/2018-05-24-skywalking-net/index.html
index aca3230..f82d677 100644
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-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
 <meta itemprop="name" content="Apache SkyWalking 为.NET Core带来开箱即用的分布式追踪和应用性能监控">
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-<meta itemprop="dateModified" content="2021-02-09T10:24:09+08:00" />
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diff --git a/zh/2018-12-18-apache-skywalking-5-0-userguide/index.html b/zh/2018-12-18-apache-skywalking-5-0-userguide/index.html
index e294aa2..00b03cc 100644
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-<meta property="article:modified_time" content="2021-02-09T10:24:09+08:00" />
+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
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 <meta itemprop="datePublished" content="2018-12-18T00:00:00+00:00" />
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diff --git a/zh/2018-12-21-skywalking-apm-sniffer-beginning/index.html b/zh/2018-12-21-skywalking-apm-sniffer-beginning/index.html
index b3cb90a..d92edc5 100644
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+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
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+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
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+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
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+<meta property="article:modified_time" content="2021-02-09T14:17:09+08:00" />
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