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https://issues.apache.org/jira/browse/HDFS-13452?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
lujie updated HDFS-13452:
-------------------------
Description: (was: Callee ZKUtil#listChildrenAndWatchForNewChildren may
return null, it has 8 callers, 6 of the caller have null checker like:
{code:java}
List<String> children = ZKUtil.listChildrenAndWatchForNewChildren(zkw,
zkw.znodePaths.rsZNode);
if (children == null) {
return Collections.emptyList();
}
{code}
but another two callers do not have null
checker:RSGroupInfoManagerImpl#retrieveGroupListFromZookeeper,ZKProcedureMemberRpcs#watchForAbortedProcedures.
We attach the patch to fix this probelm.(We found this bug by tool
[NPEDetector|https://github.com/lujiefsi/NPEDetector]))
> Two Potential NPE
> ------------------
>
> Key: HDFS-13452
> URL: https://issues.apache.org/jira/browse/HDFS-13452
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: lujie
> Priority: Major
>
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