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https://issues.apache.org/jira/browse/HADOOP-8397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13287751#comment-13287751
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Todd Lipcon commented on HADOOP-8397:
-------------------------------------
+1, looks good. Will commit this momentarily.
> NPE thrown when IPC layer gets an EOF reading a response
> --------------------------------------------------------
>
> Key: HADOOP-8397
> URL: https://issues.apache.org/jira/browse/HADOOP-8397
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 2.0.0-alpha, 3.0.0
> Reporter: Todd Lipcon
> Assignee: Vinay
> Priority: Critical
> Attachments: HADOOP-8397.patch
>
>
> When making a call on an IPC connection where the other end has shut down, I
> see the following exception:
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:852)
> at org.apache.hadoop.ipc.Client$Connection.run(Client.java:781)
> from the lines:
> {code}
> RpcResponseHeaderProto response =
> RpcResponseHeaderProto.parseDelimitedFrom(in);
> int callId = response.getCallId();
> {code}
> This is because parseDelimitedFrom() returns null in the case that the next
> thing to be read on the stream is an EOF.
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