[impala] branch master updated: [DOCS] An upgrade consideratiobn for IMPALA-7800

[jo...@apache.org]

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The following commit(s) were added to refs/heads/master by this push:
     new 10e7291  [DOCS] An upgrade consideratiobn for IMPALA-7800
10e7291 is described below

commit 10e72915de591cbd6354da9ac769550d2bc55df5
Author: Alex Rodoni <ar...@cloudera.com>
AuthorDate: Wed Jul 17 17:49:42 2019 -0700

    [DOCS] An upgrade consideratiobn for IMPALA-7800
    
    Change-Id: Ia239fec4973722bc2e53239d3dc5df608a341d92
    Reviewed-on: http://gerrit.cloudera.org:8080/13879
    Tested-by: Impala Public Jenkins <im...@cloudera.com>
    Reviewed-by: Michael Ho <kw...@cloudera.com>
---
 docs/topics/impala_upgrading.xml | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/docs/topics/impala_upgrading.xml b/docs/topics/impala_upgrading.xml
index 9dd75d3..0f9d74b 100644
--- a/docs/topics/impala_upgrading.xml
+++ b/docs/topics/impala_upgrading.xml
@@ -428,6 +428,25 @@ $ ps ax | grep [i]mpalad
       </conbody>
 
     </concept>
+    <concept id="impala-7800">
+      <title>Change in Client Connection Timeout</title>
+      <conbody>
+        <p>The default behavior of client connection timeout changed.</p>
+        <p>In Impala 3.2 and lower, client waited indefinitely to open the new
+          session if the maximum number of threads specified by
+            <codeph>--fe_service_threads</codeph> has been allocated.</p>
+        <p>In Impala 3.3 and higher, a new startup flag,
+            <codeph>--accepted_client_cnxn_timeout</codeph>, was added to
+          control how the server should treat new connection requests if we have
+          run out of the configured number of server threads.</p>
+        <p>If <codeph>--accepted_client_cnxn_timeout > 0</codeph>, new
+          connection requests are rejected after the specified timeout.</p>
+        <p>If <codeph>--accepted_client_cnxn_timeout=0</codeph>, clients waits
+          indefinitely to connect to Impala. You can use this setting to restore
+          the pre-Impala 3.3 behavior.</p>
+        <p>The default timeout is 5 minutes. </p>
+      </conbody>
+    </concept>
 
     <concept id="concept_mkn_ygr_jdb">