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https://issues.apache.org/jira/browse/HDFS-3729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13427063#comment-13427063
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ji...@taobao.com commented on HDFS-3729:
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cdh3u3 and below
> when datanode is blocked in BlockReceiver.receiveBlock(...) by disk
> error/pressure, DFSClient is blocked and no timeout mechanism
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-3729
> URL: https://issues.apache.org/jira/browse/HDFS-3729
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs client
> Reporter: ji...@taobao.com
>
> Our hadoop/hbase in taobao.com cluster is blocked by DFSClient somtimes. The
> reason is disk error or too much load, but HEART_BEAT in PacketResponder is
> normal, so DFSClient wait forever until method of disk read/write return. I
> searched issues in jira, and nothing for this issue, we plan to do some work
> to fix this bug. The initial idea is to add timeout mechanism for the
> DFSClient write function. Does some guys have comments about this?
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