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https://issues.apache.org/jira/browse/HADOOP-12567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin updated HADOOP-12567:
--------------------------------------
Affects Version/s: 2.7.0
2.7.1
Status: Patch Available (was: Open)
> NPE in SaslRpcServer
> --------------------
>
> Key: HADOOP-12567
> URL: https://issues.apache.org/jira/browse/HADOOP-12567
> Project: Hadoop Common
> Issue Type: Task
> Affects Versions: 2.7.1, 2.7.0
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HADOOP-12567.patch
>
>
> {noformat}
> if (LOG.isDebugEnabled()) {
> String username =
> getIdentifier(authzid, secretManager).getUser().getUserName();
> LOG.debug("SASL server DIGEST-MD5 callback: setting "
> + "canonicalized client ID: " + username);
> }
> {noformat}
> Looking at identifier implementations, e.g. AbstractDelegationTokenIdentifier
> (and others), I can see that getUser method can return null. If debug logging
> is enabled, this NPEs.
> If getUser is not expected to return NULL, it should either be checked and
> erred upon better here, or the error should be allowed to happen where it
> would otherwise happen, not in some debug log path.
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