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https://issues.apache.org/jira/browse/NIFI-3993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16541521#comment-16541521
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ASF GitHub Bot commented on NIFI-3993:
--------------------------------------
GitHub user HorizonNet opened a pull request:
https://github.com/apache/nifi/pull/2884
NIFI-3993 Updated the ZooKeeper version to 3.4.10
Thank you for submitting a contribution to Apache NiFi.
In order to streamline the review of the contribution we ask you
to ensure the following steps have been taken:
### For all changes:
- [x] Is there a JIRA ticket associated with this PR? Is it referenced
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You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ultratendency/nifi NIFI-3993
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/nifi/pull/2884.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 #2884
----
commit 51bef0752de1a86b3d3173437ddcc4266b3f5905
Author: Jan Hentschel <jan.hentschel@...>
Date: 2018-07-12T11:47:05Z
NIFI-3993 Updated the ZooKeeper version to 3.4.10
----
> Upgrade embedded ZooKeeper version
> ----------------------------------
>
> Key: NIFI-3993
> URL: https://issues.apache.org/jira/browse/NIFI-3993
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.2.0
> Reporter: Mark Bean
> Priority: Major
>
> In a Cluster configuration, Nodes are periodically disconnected from the
> Cluster, and then reconnected. These events correspond to the following error:
> ERROR [CommitProcessor:1] o.apache.zookeeper.server.NIOServerCnxn Unexpected
> Exception:
> java.nio.channels.CancelledKeyException: null
> at sun.nio.ch.SelectionKeyImpl.ensureValid(SectionKeyImpl.java:73)
> at sun.nio.ch.SelectionKeyImpl.interestOps(SelctionKeyImpl.java:77)
> at
> org.apache.zookeeper.server.NIOServerCnxn.sendBuffer(NIOServerCnxn.java:151)
> at
> org.apache.zookeeper.server.NIOServerCnXn.sendResopnse(NIOServerCnxn.java:1081)
> at
> org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:404)
> at
> org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:74)
> This error was reported in ZooKeeper JIRA [1], and reported as fixed in
> version 3.4.10, the current stable build. As additional confirmation, when
> using a stand-alone ZK, 3.4.10, rather than the embedded ZK, the above error
> was no longer observed.
> Update NiFi to use ZK 3.4.10
> [1] https://issues.apache.org/jira/browse/ZOOKEEPER-2044
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