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https://issues.apache.org/jira/browse/HBASE-26651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17470327#comment-17470327
 ] 

Nick Dimiduk commented on HBASE-26651:
--------------------------------------

{noformat}
ca3ba494cbc322b0824d2d755bcf4191c3a525ed is the first bad commit
commit ca3ba494cbc322b0824d2d755bcf4191c3a525ed
Author: Xiaolin Ha <[email protected]>
Date:   Tue Dec 7 12:26:59 2021 +0800

    HBASE-26526 Introduce a timeout to shutdown of WAL (#3297)
    
    Signed-off-by: Andrew Purtell <[email protected]>

 .../hbase/regionserver/wal/AbstractFSWAL.java      | 61 +++++++++++++++++-----
 1 file changed, 48 insertions(+), 13 deletions(-)
bisect found first bad commit
{noformat}

> TestDrainReplicationQueuesForStandBy is flakey
> ----------------------------------------------
>
>                 Key: HBASE-26651
>                 URL: https://issues.apache.org/jira/browse/HBASE-26651
>             Project: HBase
>          Issue Type: Test
>          Components: Replication, test
>    Affects Versions: 3.0.0-alpha-3
>            Reporter: Nick Dimiduk
>            Priority: Major
>
> {{TestDrainReplicationQueuesForStandBy}} is behaving badly for me, it keeps 
> coming up as a failure in PRs. It's been passing on master nightlies. When I 
> checkout a recent master, {{ce2bbaf30a}}, and run the test in a loop, I see 
> it failing with this error at a rate of about 2 in 10 tries.
> {noformat}
> [INFO] Running 
> org.apache.hadoop.hbase.replication.regionserver.TestDrainReplicationQueuesForStandBy
> [ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 
> 35.264 s <<< FAILURE! - in 
> org.apache.hadoop.hbase.replication.regionserver.TestDrainReplicationQueuesForStandBy
>                  
> [ERROR] 
> org.apache.hadoop.hbase.replication.regionserver.TestDrainReplicationQueuesForStandBy.test
>   Time elapsed: 15.628 s  <<< ERROR!
> java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0       
>         
>         at 
> java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)  
>                                                                               
>                                   
>         at 
> java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
>                                                                               
>                           
>         at 
> java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)  
>            
>         at java.base/java.util.Objects.checkIndex(Objects.java:372)           
>                                                                               
>                                              
>         at java.base/java.util.ArrayList.get(ArrayList.java:459)              
>                                                                               
>                                              
>         at 
> org.apache.hadoop.hbase.replication.regionserver.TestDrainReplicationQueuesForStandBy.test(TestDrainReplicationQueuesForStandBy.java:77)
>                                                       
>         at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>         at 
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.base/java.lang.reflect.Method.invoke(Method.java:566)
>         at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
>         at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>         at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
>         at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>         at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
>         at 
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
>         at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
>         at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
>         at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
>         at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
>         at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
>         at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
>         at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
>         at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
>         at 
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
>         at 
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
>         at 
> org.apache.hadoop.hbase.SystemExitRule$1.evaluate(SystemExitRule.java:38)
>         at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
>         at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
>         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
>         at java.base/java.lang.Thread.run(Thread.java:829)
> {noformat}



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