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From "Minwoo Kang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-18330) NPE in ReplicationZKLockCleanerChore
Date Tue, 11 Jul 2017 01:21:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16081464#comment-16081464
] 

Minwoo Kang edited comment on HBASE-18330 at 7/11/17 1:20 AM:
--------------------------------------------------------------

Hello~ :)
Yes, In the master branch, however, the ReplicationZKLockCleanerChore code seems to have disappeared.
So I do not know where to patch.
If you can solve it, I think that would be good.


was (Author: minwoo.kang):
Hello~ :)
Yes, In the master branch, however, the ReplicationZKLockCleanerChore code seems to have disappeared.
So I do not know where to patch.

> NPE in ReplicationZKLockCleanerChore
> ------------------------------------
>
>                 Key: HBASE-18330
>                 URL: https://issues.apache.org/jira/browse/HBASE-18330
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.2.5
>            Reporter: Minwoo Kang
>            Priority: Minor
>
> While I am watching HMaster log, I found NullPointerException Logs.
> This occurs every minute.
> --------
> 2017-07-06 09:05:02,579 DEBUG [,1498445640728_ChoreService_1] cleaner.CleanerChore: Removing:
hdfs://*** from archive
> 2017-07-06 09:05:02,585 ERROR [,1498445640728_ChoreService_2] hbase.ScheduledChore: Caught
error
> java.lang.NullPointerException
>         at org.apache.hadoop.hbase.master.cleaner.ReplicationZKLockCleanerChore.chore(ReplicationZKLockCleanerChore.java:80)
>         at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:185)
>         at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
>         at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
>         at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
>         at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
>         at org.apache.hadoop.hbase.JitterScheduledThreadPoolExecutorImpl$JitteredRunnableScheduledFuture.run(JitterScheduledThreadPoolExecutorImpl.java:110)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> 2017-07-06 09:05:02,585 DEBUG [,1498445640728_ChoreService_1] cleaner.CleanerChore: Removing:
hdfs://*** from archive
> 2017-07-06 09:05:02,586 DEBUG [,1498445640728_ChoreService_1] cleaner.CleanerChore: Removing:
hdfs://*** from archive
> --------
> Here is related code:
>       List<String> replicators = queues.getListOfReplicators();
>       for (String replicator: replicators) {



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