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https://issues.apache.org/jira/browse/HDFS-2747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13186659#comment-13186659
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Todd Lipcon commented on HDFS-2747:
-----------------------------------
- add braces around the body of the new if statement
- typo in test name: "ShoulNot"
- parameter should capitalize "namesystem" not "nameSystem" since it is
FSNamesystem, not FSNameSystem
-- I also think NameNodeAdapter is probably a better spot for this than
FSImageTestUtil
- In the javadoc for the new tests, can you mention that it is a regression
test for HDFS-2747? I think it's useful for future maintenance of the tests to
be able to refer back to the discussion on this bug.
Thanks!
> HA: entering safe mode after starting SBN can NPE
> -------------------------------------------------
>
> Key: HDFS-2747
> URL: https://issues.apache.org/jira/browse/HDFS-2747
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Eli Collins
> Assignee: Uma Maheswara Rao G
> Attachments: HDFS-2747.patch
>
>
> Entering Safemode on the primary after while it's already in safemode after
> the SBN is started results in an NPE:
> {noformat}
> hadoop-0.24.0-SNAPSHOT $ ./bin/hdfs dfsadmin -safemode get
> Safe mode is ON
> hadoop-0.24.0-SNAPSHOT $ ./bin/hdfs dfsadmin -safemode enter
> safemode: java.lang.NullPointerException
> {noformat}
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