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From bbej...@apache.org
Subject [kafka] branch 2.4 updated: MINOR: Update upgrade guide for ZK (#8182)
Date Thu, 27 Feb 2020 23:02:23 GMT
This is an automated email from the ASF dual-hosted git repository.

bbejeck pushed a commit to branch 2.4
in repository https://gitbox.apache.org/repos/asf/kafka.git


The following commit(s) were added to refs/heads/2.4 by this push:
     new a696296  MINOR: Update upgrade guide for ZK (#8182)
a696296 is described below

commit a696296fe3201291dfb34e5af9d96f2d6a104366
Author: Bill Bejeck <bbejeck@gmail.com>
AuthorDate: Thu Feb 27 18:01:44 2020 -0500

    MINOR: Update upgrade guide for ZK (#8182)
    
    Adding the ZK upgrade information to the Notable Changes section for 2.4.1
    
    Reviewers: Ron Dagostino <rdagostino@confluent.io>, Jim Galasyn <jim.galasyn@confluent.io>
---
 docs/upgrade.html | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/upgrade.html b/docs/upgrade.html
index 4394784..6b3775c 100644
--- a/docs/upgrade.html
+++ b/docs/upgrade.html
@@ -82,6 +82,17 @@
     </li>
 </ol>
 
+<h5><a id="upgrade_241_notable" href="#upgrade_241_notable">Notable changes in
2.4.1</a></h5>
+<ul>
+    <li>
+        ZooKeeper has been upgraded to 3.5.7, and a ZooKeeper upgrade from 3.4.X to 3.5.7
can fail if there are no snapshot files in the 3.4 data directory.
+        This usually happens in test upgrades where ZooKeeper 3.5.7 is trying to load an
existing 3.4 data dir in which no snapshot file has been created.
+        For more information, see <a href="https://issues.apache.org/jira/browse/ZOOKEEPER-3056">ZOOKEEPER-3056</a>.
+        A fix is given in <a href="https://issues.apache.org/jira/browse/ZOOKEEPER-3056">ZOOKEEPER-3056</a>,
which is to set the <code>snapshot.trust.empty=true</code>
+        config in <code>zookeeper.properties</code> before the upgrade.
+    </li>
+</ul>
+
 <h5><a id="upgrade_240_notable" href="#upgrade_240_notable">Notable changes in
2.4.0</a></h5>
 <ul>
     <li>A new Admin API has been added for partition reassignments. Due to changing
the way Kafka propagates reassignment information,


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