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Posted to dev@kafka.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2016/11/27 03:54:58 UTC
[jira] [Commented] (KAFKA-4229) Controller can't start after
several zk expired event
[ https://issues.apache.org/jira/browse/KAFKA-4229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15698987#comment-15698987 ]
ASF GitHub Bot commented on KAFKA-4229:
---------------------------------------
GitHub user pengwei-li opened a pull request:
https://github.com/apache/kafka/pull/2175
KAFKA-4229:Controller can't start after several zk expired event
Author: pengwei <pe...@huawei.com>
Reviewers: wangguoz.gmail.com
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/pengwei-li/kafka trunk
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/2175.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2175
----
commit a920d4e9807add634cc44e4b7cf9e156edd515cf
Author: pengwei-li <pe...@huawei.com>
Date: 2016-07-10T00:31:56Z
KAFKA-1429: Yet another deadlock in controller shutdown
Author: pengwei <pe...@huawei.com>
Reviewers: NA
commit 2a5a4322c8ac359587f05b459588cd2b5843a2ac
Author: pengwei-li <pe...@huawei.com>
Date: 2016-11-20T11:31:21Z
Merge branch 'trunk' of https://github.com/apache/kafka into trunk
commit b827a8b4f249050ca40db9f14e8e10b01650a6b8
Author: pengwei-li <pe...@huawei.com>
Date: 2016-11-20T12:18:49Z
Merge branch 'trunk' of https://github.com/apache/kafka into trunk
commit 43e186f223dee1e24177a87ee6888eaae91547d9
Author: pengwei-li <pe...@huawei.com>
Date: 2016-11-27T01:54:00Z
Merge branch 'trunk' of https://github.com/apache/kafka into trunk
commit febe4f433452a2ad8849a329bc5c9f4d1507a317
Author: pengwei-li <pe...@huawei.com>
Date: 2016-11-27T03:31:26Z
issue:KAFKA-4229
reason: controoler can't start afeter several zk expired event
----
> Controller can't start after several zk expired event
> -----------------------------------------------------
>
> Key: KAFKA-4229
> URL: https://issues.apache.org/jira/browse/KAFKA-4229
> Project: Kafka
> Issue Type: Bug
> Components: controller
> Affects Versions: 0.9.0.0, 0.9.0.1, 0.10.0.0, 0.10.0.1
> Reporter: Pengwei
> Assignee: Pengwei
>
> We found the controller not started after several zk expired event in our test environment. By analysing the log, I found the controller will handle the ephemeral node data delete event first and then the zk expired event , then the controller will gone.
> I can reproducer it on my develop env:
> 1. set up a one broker and one zk env, specify a very large zk timeout (20s)
> 2. stop the broker and remove the zk's /broker/ids/0 directory
> 3. restart the broker and make a breakpoint in the zk client's event thread to queue the delete event.
> 4. after the /controller node gone the breakpoint will hit.
> 5. expired the current session(suspend the send thread) and create a new session s2
> 6. resume the event thread, then the controller will handle LeaderChangeListener.handleDataDeleted and become leader
> 7. then controller will handle SessionExpirationListener.handleNewSession, it resign the controller and elect, but when elect it found the /controller node is exist and not become the leader. But the /controller node is created by current session s2 will not remove. So the controller is gone
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