[pulsar-site] 01/01: release blog

[xi...@apache.org]

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

xiangying pushed a commit to branch 2.10.4-release-note
in repository https://gitbox.apache.org/repos/asf/pulsar-site.git

commit 5208a8bfab501e9f282bcbe10db5fdbd1f15ca3c
Author: xiangying <19...@qq.com>
AuthorDate: Thu May 4 11:04:49 2023 +0800

    release blog
---
 blog/2023-04-19-Apache-Pulsar-2-10-4.md | 59 +++++++++++++++++++++++++++++++++
 data/release-pulsar.js                  |  2 +-
 2 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/blog/2023-04-19-Apache-Pulsar-2-10-4.md b/blog/2023-04-19-Apache-Pulsar-2-10-4.md
new file mode 100644
index 00000000000..05978861af8
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@@ -0,0 +1,59 @@
+---
+title: "What’s New in Apache Pulsar 2.10.4"
+date: 2023-04-19
+author: "liangyepianzhou, Anonymitaet, momo-jun"
+---
+
+The Apache Pulsar community releases version 2.10.4! 37 contributors provided improvements and bug fixes that delivered 12 commits. Thanks for all your contributions.
+
+This blog walks through the most noteworthy changes. For the complete list, including all feature enhancements and bug fixes, check out the [Pulsar 2.10.4 Release Notes](https://pulsar.apache.org/release-notes/versioned/pulsar-2.10.4/).
+
+<!--truncate-->
+
+### Improve performance in Key_Shared subscriptions ([PR-19167](https://github.com/apache/pulsar/pull/19167))
+
+#### Issue
+In earlier versions, Key_Shared subscriptions suffered from performance issues due to the lack of a ref count for sticky hash.
+
+#### Resolution
+A significant performance improvement has been made to the Key_Shared subscriptions by adding a ref count for sticky hash. This optimization reduces the time required to check if messages contain the hash from a given sticky hash set, resulting in improved performance and efficiency.
+
+### AbstractBatchedMetadataStore - Use AlreadyClosedException instead of IllegalStateException ([PR-19284](https://github.com/apache/pulsar/pull/19284))
+
+#### Issue
+In earlier versions, when the broker was shutting down, the `AbstractBatchedMetadataStore` would complete pending operations with a generic `IllegalStateException`. However, code dependent on the `MetadataStore` usually expected instances of `MetadataStoreException` and might not react properly to this error.
+
+#### Resolution
+This PR improves the error handling during broker shutdown by completing pending operations with an `AlreadyClosedException` instead of `IllegalStateException`. This ensures that the dependent code responds more appropriately to the error, even if the broker is shutting down.
+
+### Fix open cursor with null-initialPosition, resulting in the earliest position ([PR-18416](https://github.com/apache/pulsar/pull/18416))
+
+#### Issue
+In earlier versions, called `ledger.openCursor("xxx", null)` with a null `initialPosition` parameter would result in the cursor being set to the earliest position, causing unexpected behavior. The root cause of this issue was due to incorrect handling of the `initialPosition` in `ManagedLedgerImpl.java`.
+
+
+#### Resolution
+This PR fixes the issue by ensuring that the correct initial position is used when opening a cursor with a null `initialPosition`. The code now sets the cursor to the latest position, as expected.
+
+
+### Add isActive in ManagedCursorImpl ([PR-19341](https://github.com/apache/pulsar/pull/19341))
+
+#### Issue
+In previous versions, when there were many concurrent subscriptions in a topic, broker performance would degrade due to many io-threads waiting for the lock, synchronized (activeCursors) while calling checkBackloggedCursors.
+
+#### Resolution
+This PR adds an `isActive` variable in `ManagedCursorImpl` to minimize the access to `activeCursors` in `ManagedLedgerImpl,` which reduces the contention on the lock and improves the broker performance with many concurrent subscriptions.
+
+### Support deleting partitioned topics with the keyword -partition- ([PR-19230](https://github.com/apache/pulsar/pull/19230))
+
+#### Issue
+In earlier versions, although users could create partitioned topics using the client when partitioned type auto-creation was enabled, there was no support for deleting these partitioned topics.
+
+#### Resolution
+This PR adds support for deleting partitioned topics using the keyword `-partition-`, making it easier for users to manage their partitioned topics.
+
+# What’s Next?
+
+If you are interested in learning more about Pulsar 2.10.4, you can [download](https://pulsar.apache.org/download/) and try it out now!
+
+For more information about the Apache Pulsar project and current progress, visit the Pulsar website and follow the project.
diff --git a/data/release-pulsar.js b/data/release-pulsar.js
index 5994c54e580..ef93341d3ca 100644
--- a/data/release-pulsar.js
+++ b/data/release-pulsar.js
@@ -15,7 +15,7 @@ module.exports = [
         "publishedAt": "2023-04-18T01:53:34Z",
         "vtag": "2.10.x",
         "releaseNotes": "/release-notes/versioned/pulsar-2.10.4/",
-        "releaseBlog": "",
+        "releaseBlog": "/blog/2023-04-19-Apache-Pulsar-2-10-4.md",
         "doc": "/docs/2.10.x",
         "version": "v2.10.x"
     },