[
https://issues.apache.org/jira/browse/KUDU-1962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15949668#comment-15949668
]
Todd Lipcon commented on KUDU-1962:
-----------------------------------
After some investigation this seems to be similar to the issue [~aserbin]
reported at https://gerrit.cloudera.org/#/c/6401/
I managed to repro in a unit test. Will post a fix momentarily.
> NPE and lost callback in Java client when master queue overflows
> ----------------------------------------------------------------
>
> Key: KUDU-1962
> URL: https://issues.apache.org/jira/browse/KUDU-1962
> Project: Kudu
> Issue Type: Bug
> Components: client
> Affects Versions: 1.3.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Blocker
>
> An Impala user reported seeing the following stack trace in the frontend,
> followed by a query hanging in planning:
> {code}
>
> Mar 30, 2017 2:14:32 AM
> org.apache.kudu.client.shaded.org.jboss.netty.util.HashedWheelTimer
> WARNING: An exception was thrown by TimerTask.
> java.lang.NullPointerException
> at
> org.apache.kudu.client.AsyncKuduClient.sendRpcToTablet(AsyncKuduClient.java:737)
> at
> org.apache.kudu.client.AsyncKuduClient$2RetryTimer.run(AsyncKuduClient.java:1297)
> at
> org.apache.kudu.client.shaded.org.jboss.netty.util.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:556)
> at
> org.apache.kudu.client.shaded.org.jboss.netty.util.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:632)
> at
> org.apache.kudu.client.shaded.org.jboss.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:369)
> at
> org.apache.kudu.client.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at java.lang.Thread.run(Thread.java:745)
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
