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From guozh...@apache.org
Subject kafka git commit: MINOR: Upgrade note on compacted topics behaviour on receiving message without key
Date Thu, 21 Jan 2016 19:44:50 GMT
Repository: kafka
Updated Branches:
  refs/heads/trunk 9577dc235 -> f2d4ed5bc

MINOR: Upgrade note on compacted topics behaviour on receiving message without key

Author: Ismael Juma <ismael@juma.me.uk>

Reviewers: Grant Henke, Guozhang Wang

Closes #798 from ijuma/upgrade-notes-unkeyed-messages-to-compacted-topics

Project: http://git-wip-us.apache.org/repos/asf/kafka/repo
Commit: http://git-wip-us.apache.org/repos/asf/kafka/commit/f2d4ed5b
Tree: http://git-wip-us.apache.org/repos/asf/kafka/tree/f2d4ed5b
Diff: http://git-wip-us.apache.org/repos/asf/kafka/diff/f2d4ed5b

Branch: refs/heads/trunk
Commit: f2d4ed5bc4c2bc2bf7241ad6b6a9d3c0ce026269
Parents: 9577dc2
Author: Ismael Juma <ismael@juma.me.uk>
Authored: Thu Jan 21 11:44:44 2016 -0800
Committer: Guozhang Wang <wangguoz@gmail.com>
Committed: Thu Jan 21 11:44:44 2016 -0800

 docs/upgrade.html | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/upgrade.html b/docs/upgrade.html
index c723957..d8a7719 100644
--- a/docs/upgrade.html
+++ b/docs/upgrade.html
@@ -39,6 +39,7 @@
     <li> Broker IDs above 1000 are now reserved by default to automatically assigned
broker IDs. If your cluster has existing broker IDs above that threshold make sure to increase
the reserved.broker.max.id broker configuration property accordingly. </li>
     <li> Configuration parameter replica.lag.max.messages was removed. Partition leaders
will no longer consider the number of lagging messages when deciding which replicas are in
sync. </li>
     <li> Configuration parameter replica.lag.time.max.ms now refers not just to the
time passed since last fetch request from replica, but also to time since the replica last
caught up. Replicas that are still fetching messages from leaders but did not catch up to
the latest messages in replica.lag.time.max.ms will be considered out of sync. </li>
+    <li> Compacted topics no longer accept messages without key and an exception is
thrown by the producer if this is attempted. In 0.8.x, a message without key would cause the
log compaction thread to subsequently complain and quit (and stop compacting all compacted
topics). </li>
     <li> MirrorMaker no longer supports multiple target clusters. As a result it will
only accept a single --consumer.config parameter. To mirror multiple source clusters, you
will need at least one MirrorMaker instance per source cluster, each with its own consumer
configuration. </li>
     <li> Tools packaged under <em>org.apache.kafka.clients.tools.*</em>
have been moved to <em>org.apache.kafka.tools.*</em>. All included scripts will
still function as usual, only custom code directly importing these classes will be affected.
     <li> The default Kafka JVM performance options (KAFKA_JVM_PERFORMANCE_OPTS) have
been changed in kafka-run-class.sh. </li>

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