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https://issues.apache.org/jira/browse/SENTRY-555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14230242#comment-14230242
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Arun Suresh commented on SENTRY-555:
------------------------------------
Committed to _master_ :
{noformat}
Repository: incubator-sentry
Updated Branches:
refs/heads/master ac919b28d -> 1a697a090
SENTRY-555: Ensure groupName returned for dir objects within prefix but not
associated with an authz object is not null
Branch: refs/heads/master
Commit: 1a697a0909f1e43334bd36cf79c82b8c98b6f18a
{noformat}
> Ensure groupName returned for dir objects within prefix but not associated
> with an authz object is not null
> -----------------------------------------------------------------------------------------------------------
>
> Key: SENTRY-555
> URL: https://issues.apache.org/jira/browse/SENTRY-555
> Project: Sentry
> Issue Type: Bug
> Affects Versions: 1.5.0
> Reporter: Arun Suresh
> Assignee: Arun Suresh
> Attachments: SENTRY-555.1.patch
>
>
> It looks like the namenode throws the following NPE and dies after a while
> NameNode hitting NPE when writing to journal log: "Error: write op failed for
> (journal JournalAndStream(stream=EditLogFileOutputStream):
> NullPointerException".
> {noformat}
> Error: write op failed for (journal
> JournalAndStream(mgr=FileJournalManager(root=/data/dfs/nn),
> stream=EditLogFileOutputStream(/data/dfs/nn/current/edits_inprogress_0000000000000000001)))
> java.lang.NullPointerException
> at org.apache.hadoop.io.Text.encode(Text.java:450)
> at org.apache.hadoop.io.Text.encode(Text.java:431)
> at org.apache.hadoop.io.Text.writeString(Text.java:491)
> at
> org.apache.hadoop.fs.permission.PermissionStatus.write(PermissionStatus.java:117)
> at
> org.apache.hadoop.fs.permission.PermissionStatus.write(PermissionStatus.java:97)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogOp$MkdirOp.writeFields(FSEditLogOp.java:1432)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogOp$Writer.writeOp(FSEditLogOp.java:3828)
> at
> org.apache.hadoop.hdfs.server.namenode.EditsDoubleBuffer$TxnBuffer.writeOp(EditsDoubleBuffer.java:149)
> at
> org.apache.hadoop.hdfs.server.namenode.EditsDoubleBuffer.writeOp(EditsDoubleBuffer.java:53)
> at
> org.apache.hadoop.hdfs.server.namenode.EditLogFileOutputStream.write(EditLogFileOutputStream.java:97)
> at
> org.apache.hadoop.hdfs.server.namenode.JournalSet$JournalSetOutputStream$1.apply(JournalSet.java:452)
> at
> org.apache.hadoop.hdfs.server.namenode.JournalSet.mapJournalsAndReportErrors(JournalSet.java:393)
> at
> org.apache.hadoop.hdfs.server.namenode.JournalSet.access$100(JournalSet.java:57)
> at
> org.apache.hadoop.hdfs.server.namenode.JournalSet$JournalSetOutputStream.write(JournalSet.java:448)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.logEdit(FSEditLog.java:421)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.logMkDir(FSEditLog.java:793)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsRecursively(FSNamesystem.java:4171)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:4071)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInt(FSNamesystem.java:4030)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:4003)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:786)
> at
> org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.mkdirs(AuthorizationProviderProxyClientProtocol.java:297)
> at ..
> {noformat}
> This is due to the fact that the _groupName_ returned by the
> {{SentryAuthorizationProvider}} is null at times.
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