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https://issues.apache.org/jira/browse/HADOOP-7488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13072350#comment-13072350
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Uma Maheswara Rao G commented on HADOOP-7488:
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Thanks Jhon for taking alook on this issue.
Updated a patch for review!.
This patch introduces a property( max.ping.retries.on.socket.timeout ). Default
value will be -1, represents that disabling of this property.
In this scenario, if we unplug the network cable between the nodes, this ping
reads will get timeouts continuosly . SocketTimeOuts was handled and retried
infinitely.So, it was waiting for long time.....
Now , to avoid this problem, we can configure the number of ping retries.
Anyway continuos timeouts means , somthing wrong in network/cluster, we can
restrict this retries by configuring the above property.
Bydefault this property will be disabled.
--Thanks
> When Namenode network is unplugged, DFSClient operations waits for ever
> -----------------------------------------------------------------------
>
> Key: HADOOP-7488
> URL: https://issues.apache.org/jira/browse/HADOOP-7488
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Reporter: Uma Maheswara Rao G
> Attachments: HADOOP-7488.patch
>
>
> When NN/DN is shutdown gracefully, the DFSClient operations which are waiting
> for a response from NN/DN, will throw exception & come out quickly
> But when the NN/DN network is unplugged, the DFSClient operations which are
> waiting for a response from NN/DN, waits for ever.
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