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https://issues.apache.org/jira/browse/HDFS-10682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15412249#comment-15412249
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Chen Liang edited comment on HDFS-10682 at 8/8/16 6:44 PM:
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The failed tests are unrelated and seem to be tests that fail frequently
recently, see:
HADOOP-13469 which tracks TestRefreshUserMappings fail
HDFS-10732 which tracks TestTracing fail
was (Author: vagarychen):
The failed tests are unrelated and seem to be failing frequently recently, see:
HADOOP-13469 which tracks TestRefreshUserMappings fail
HDFS-10732 which tracks TestTracing fail
> Replace FsDatasetImpl object lock with a separate lock object
> -------------------------------------------------------------
>
> Key: HDFS-10682
> URL: https://issues.apache.org/jira/browse/HDFS-10682
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Chen Liang
> Assignee: Chen Liang
> Attachments: HDFS-10682.001.patch, HDFS-10682.002.patch,
> HDFS-10682.003.patch, HDFS-10682.004.patch, HDFS-10682.005.patch,
> HDFS-10682.006.patch, HDFS-10682.007.patch, HDFS-10682.008.patch,
> HDFS-10682.009.patch, HDFS-10682.010.patch
>
>
> This Jira proposes to replace the FsDatasetImpl object lock with a separate
> lock object. Doing so will make it easier to measure lock statistics like
> lock held time and warn about potential lock contention due to slow disk
> operations.
> Right now we can use org.apache.hadoop.util.AutoCloseableLock. In the future
> we can also consider replacing the lock with a read-write lock.
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