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https://issues.apache.org/jira/browse/HDFS-3704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482408#comment-13482408
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Daryn Sharp commented on HDFS-3704:
-----------------------------------
I too am concerned about marking the node dead for any {{IOException}}.
Transient errors won't be recoverable. Perhaps a {{RemoteException}} that
isn't a {{ReplicaNotFoundException}} are candidates for marking the dead as
node, but I'm not well acquainted with the code to know what unexpected
consequences it may have.
> In the DFSClient, Add the node to the dead list when the ipc.Client calls
> fails
> -------------------------------------------------------------------------------
>
> Key: HDFS-3704
> URL: https://issues.apache.org/jira/browse/HDFS-3704
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 1.0.3, 2.0.0-alpha
> Reporter: nkeywal
> Priority: Minor
> Attachments: HADOOP-3704.patch, HADOOP-3704.patch
>
>
> The DFSCLient maintains a list of dead node per input steam. When creating
> this DFSInputStream, it may connect to one of the nodes to check final block
> size. If this call fail, this datanode should be put in the dead nodes list
> to save time. If not it will be retried for the block transfer during the
> read, and we're likely to get a timeout.
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