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Posted to common-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/06/10 15:42:00 UTC
[jira] [Updated] (HADOOP-17758) NPE and excessive warnings after
HADOOP-17728
[ https://issues.apache.org/jira/browse/HADOOP-17758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HADOOP-17758:
------------------------------------
Labels: pull-request-available (was: )
> NPE and excessive warnings after HADOOP-17728
> ---------------------------------------------
>
> Key: HADOOP-17758
> URL: https://issues.apache.org/jira/browse/HADOOP-17758
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Affects Versions: 3.4.0
> Reporter: Jim Brennan
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> I'm noticing these warnings and NPE's when just running a simple pi test on a one node cluster:
> {noformat}
> 2021-06-09 21:51:12,334 WARNÂ [org.apache.hadoop.fs.FileSystem$Statistics$StatisticsDataReferenceCleaner] fs.FileSystem (FileSystem.java:run(4025)) - Exception in the cleaner thread but it will continue to run
> java.lang.NullPointerException
> at org.apache.hadoop.fs.FileSystem$Statistics$StatisticsDataReferenceCleaner.run(FileSystem.java:4020)
> at java.lang.Thread.run(Thread.java:748){noformat}
> This appears to be due to [HADOOP-17728].
> I'm not sure I understand why that change was made? Wasn't it by design that the remove should wait until something is queued?
> [~kaifeiYi] can you please investigate?
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