[jira] [Resolved] (KUDU-3019) Kudu client hangs in Deffered.join()

["Grant Henke (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KUDU-3019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Grant Henke resolved KUDU-3019.
-------------------------------
    Fix Version/s: NA
       Resolution: Cannot Reproduce

> Kudu client hangs in Deffered.join()
> ------------------------------------
>
>                 Key: KUDU-3019
>                 URL: https://issues.apache.org/jira/browse/KUDU-3019
>             Project: Kudu
>          Issue Type: Bug
>    Affects Versions: 1.6.0
>            Reporter: Zoltán Borók-Nagy
>            Priority: Major
>             Fix For: NA
>
>
> In Impala we've seen the Kudu client hanging with the following stack trace:
> {noformat}
> Thread 53015: (state = BLOCKED)
>  - java.lang.Object.wait(long) @bci=0 (Compiled frame; information may be imprecise)
>  - java.lang.Object.wait() @bci=2, line=502 (Compiled frame)
>  - com.stumbleupon.async.Deferred.doJoin(boolean, long) @bci=77, line=1122 (Compiled frame)
>  - com.stumbleupon.async.Deferred.join() @bci=3, line=1006 (Compiled frame)
>  - org.apache.kudu.client.KuduClient.joinAndHandleException(com.stumbleupon.async.Deferred) @bci=1, line=340 (Compiled frame)
>  - org.apache.kudu.client.KuduClient.openTable(java.lang.String) @bci=10, line=212 (Compiled frame)
>  - org.apache.impala.planner.KuduScanNode.init(org.apache.impala.analysis.Analyzer) @bci=32, line=115 (Compiled frame)
>  - org.apache.impala.planner.SingleNodePlanner.createScanNode(org.apache.impala.analysis.TableRef, org.apache.impala.analysis.AggregateInfo, org.apache.impala.analysis.Analyzer) @bci=252, line=1312 (Compiled frame)
> ...{noformat}
> The client hangs in Deferred.join():
> [https://github.com/apache/kudu/blob/a8c6ea258c06407c1a4fef260da3a1cb70529bd9/java/kudu-client/src/main/java/org/apache/kudu/client/KuduClient.java#L423]
> To at least mitigate the problem, maybe Deferred.join(long timeout) could be used instead.



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