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https://issues.apache.org/jira/browse/HADOOP-12178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14975822#comment-14975822
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zhihai xu commented on HADOOP-12178:
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Thanks for the explanations! Checking null pointer may avoid potential NPE from
code change in the future. +1 for the patch. Will commit this tomorrow if there
are no objections.
> NPE during handling of SASL setup if problem with SASL resolver class
> ---------------------------------------------------------------------
>
> Key: HADOOP-12178
> URL: https://issues.apache.org/jira/browse/HADOOP-12178
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 2.7.1
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Attachments: HADOOP-12178-001.patch
>
>
> If there's any problem in the constructor of {{SaslRpcClient}}, then IPC
> Client throws an NPE rather than forwarding the stack trace. This is because
> the exception handler assumes that {{saslRpcClient}} is not null, that the
> exception is related to the SASL setup itself.
> The exception handler needs to check for {{saslRpcClient}} being null, and if
> so, rethrow the exception
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