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Posted to issues@nifi.apache.org by "humpfhumpf (Jira)" <ji...@apache.org> on 2021/03/16 11:29:00 UTC
[jira] [Commented] (NIFI-3993) Upgrade embedded ZooKeeper version
[ https://issues.apache.org/jira/browse/NIFI-3993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17302440#comment-17302440 ]
humpfhumpf commented on NIFI-3993:
----------------------------------
Since NIFI-6733 (released with NiFi 1.11.1), Zookeeper was upgraded to 3.5.6. Currently, the latest Zookeeper bugfix on 3.5 branch is 3.5.9.
> 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
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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