Zoltán Borók-Nagy created KUDU-3019:
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Summary: Kudu client hangs in Deffered.join()
Key: KUDU-3019
URL: https://issues.apache.org/jira/browse/KUDU-3019
Project: Kudu
Issue Type: Bug
Reporter: Zoltán Borók-Nagy
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)
...{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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