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https://issues.apache.org/jira/browse/HADOOP-5859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712275#action_12712275
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Kan Zhang commented on HADOOP-5859:
-----------------------------------
added a new patch that refactored DFSClient.DFSOutputStream code.
1) socket write operation in DataStreamer is now done without holding dataQueue
lock
2) dataQueue lock and ackQueue lock are merged into one
3) removed the above findbugs warnings
> FindBugs : fix "wait() or sleep() with locks held" warnings in hdfs
> -------------------------------------------------------------------
>
> Key: HADOOP-5859
> URL: https://issues.apache.org/jira/browse/HADOOP-5859
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: Kan Zhang
> Assignee: Kan Zhang
> Attachments: 5859-19.patch, 5859-4.patch, 5859-5.patch, 5859-8.patch
>
>
> This JIRA fixes the following warnings:
> SWL org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.closeInternal() calls
> Thread.sleep() with a lock held
> TLW wait() with two locks held in
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.flushInternal()
> TLW wait() with two locks held in
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.flushInternal()
> TLW wait() with two locks held in
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.writeChunk(byte[], int, int,
> byte[])
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