Andrzej Bialecki created SOLR-11171:
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Summary: OverseerTriggerThread throws a fatal exception when
ScheduledTriggers is closed
Key: SOLR-11171
URL: https://issues.apache.org/jira/browse/SOLR-11171
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: AutoScaling
Reporter: Andrzej Bialecki
Assignee: Andrzej Bialecki
Fix For: 7.1
[~caomanhdat] reports that some test runs encounter errors like this:
{code}
FAILED: org.apache.solr.cloud.LeaderInitiatedRecoveryOnCommitTest.test
Error Message:
Captured an uncaught exception in thread: Thread[id=3592,
name=OverseerAutoScalingTriggerThread-98399623586316301-127.0.0.1:46752__jbu%2Fl-n_0000000002,
state=RUNNABLE, group=Overseer autoscaling triggers]
Stack Trace:
com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an uncaught
exception in thread: Thread[id=3592,
name=OverseerAutoScalingTriggerThread-98399623586316301-127.0.0.1:46752__jbu%2Fl-n_0000000002,
state=RUNNABLE, group=Overseer autoscaling triggers]
at
__randomizedtesting.SeedInfo.seed([829F220930068B70:ACB1DD39EFAE688]:0)
Caused by: org.apache.lucene.store.AlreadyClosedException: ScheduledTriggers
has been closed and cannot be used anymore
at __randomizedtesting.SeedInfo.seed([829F220930068B70]:0)
at
org.apache.solr.cloud.autoscaling.ScheduledTriggers.add(ScheduledTriggers.java:137)
at
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:189)
at java.lang.Thread.run(Thread.java:745)
{code}
This is caused by the ordering of {{isClosed}} checks vs. the places where
OverseerTriggerThread attempts to modify scheduled triggers -
{{OverseerTriggerThread.close()}} sets the flag and closes
{{ScheduledTriggers}} but the main loop in {{run()}} will continue executing
until the loop's end and may try to use already closed {{ScheduleTriggers}}.
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