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From "Rohit Kochar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4581) DataNode#checkDiskError should not be called on network errors
Date Mon, 11 Mar 2013 05:03:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13598539#comment-13598539

Rohit Kochar commented on HDFS-4581:

We are facing an issue in which most of checkDiskError() invocations are happening due to
network related exceptions in BlockReciever$PacketResponder.run() and DataNode$DataTransfer.run().
Since the current code has a common catch clause for all types of exceptions hence even for
network related IO Exceptions chedkDiskError() in executed which lead to check storm thereby
slowing the datanode.
> DataNode#checkDiskError should not be called on network errors
> --------------------------------------------------------------
>                 Key: HDFS-4581
>                 URL: https://issues.apache.org/jira/browse/HDFS-4581
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Rohit Kochar

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