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https://issues.apache.org/jira/browse/HDFS-7542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14251365#comment-14251365
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Stephen Chu commented on HDFS-7542:
-----------------------------------
TestRollingUpgradeRollback failure is unrelated to these DFSAdmin command
changes. I re-ran the test a few times successfully. The release audit warning
also seems to be incorrect because all modified files have the Apache license.
It's hard to see the exact test name that timed out. Retrying jenkins with the
same patch.
> Add an option to DFSAdmin -safemode wait to ignore connection failures
> ----------------------------------------------------------------------
>
> Key: HDFS-7542
> URL: https://issues.apache.org/jira/browse/HDFS-7542
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: tools
> Affects Versions: 2.6.0
> Reporter: Stephen Chu
> Assignee: Stephen Chu
> Priority: Minor
> Attachments: HDFS-7542.001.patch, HDFS-7542.002.patch
>
>
> Currently, the _dfsadmin -safemode wait_ command aborts when connection to
> the NN fails (network glitch, ConnectException when NN is unreachable,
> EOFException if network link shut down).
> In certain situations, users have asked for an option to make the command
> resilient to connection failures. This is useful so that the admin can
> initiate the wait command despite the NN not being fully up or survive
> intermittent network issues. With this option, the admin can rely on the wait
> command continuing to poll instead of aborting.
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