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https://issues.apache.org/jira/browse/STORM-1108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14953926#comment-14953926
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Jungtaek Lim commented on STORM-1108:
-------------------------------------
Seems like there's race condition in Time.java.
1. Thread A calls Time.sleepUntil(), and passes first if statement.
2. Thread B calls Time.stopSimulating(), and acquire sleepTimesLock, and set
simulating to false, and threadSleepTimes to null, and release sleepTimesLock.
3. Thread A acquire sleepTimesLock, and put sleep time to threadSleepTimes
which should throw NPE.
> Random test failure : reset-log-levels-timer fails with NPE
> -----------------------------------------------------------
>
> Key: STORM-1108
> URL: https://issues.apache.org/jira/browse/STORM-1108
> Project: Apache Storm
> Issue Type: Sub-task
> Components: storm-core
> Reporter: Jungtaek Lim
>
> https://travis-ci.org/apache/storm/jobs/84955623
> "test-component-specific-config-clojure" shows this issue.
> {code}
> 94755 [reset-log-levels-timer] ERROR b.s.d.worker - Error when processing
> event
> java.lang.NullPointerException
> at backtype.storm.utils.Time.sleepUntil(Time.java:61) ~[classes/:?]
> at backtype.storm.utils.Time.sleep(Time.java:81) ~[classes/:?]
> at backtype.storm.timer$mk_timer$fn__4130$fn__4131.invoke(timer.clj:60)
> [classes/:?]
> at backtype.storm.timer$mk_timer$fn__4130.invoke(timer.clj:42)
> [classes/:?]
> at clojure.lang.AFn.run(AFn.java:22) [clojure-1.7.0.jar:?]
> at java.lang.Thread.run(Thread.java:745) [?:1.8.0_31]
> 94755 [reset-log-levels-timer] ERROR b.s.d.worker - Error when processing
> event
> java.lang.NullPointerException
> at backtype.storm.utils.Time.sleepUntil(Time.java:61) ~[classes/:?]
> at backtype.storm.utils.Time.sleep(Time.java:81) ~[classes/:?]
> at backtype.storm.timer$mk_timer$fn__4130$fn__4131.invoke(timer.clj:60)
> [classes/:?]
> at backtype.storm.timer$mk_timer$fn__4130.invoke(timer.clj:42)
> [classes/:?]
> at clojure.lang.AFn.run(AFn.java:22) [clojure-1.7.0.jar:?]
> at java.lang.Thread.run(Thread.java:745) [?:1.8.0_31]
> {code}
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