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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9249) NPE thrown if an IOException is thrown in NameNode.<init>
Date Fri, 16 Oct 2015 19:11:05 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14961221#comment-14961221
] 

Hadoop QA commented on HDFS-9249:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  20m 16s | Pre-patch trunk has 1 extant Findbugs (version
3.0.0) warnings. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any @author tags.
|
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to include 1 new
or modified test files. |
| {color:green}+1{color} | javac |   8m 52s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  11m 33s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 26s | The applied patch does not increase
the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   1m 37s | There were no new checkstyle issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that end in whitespace.
|
| {color:green}+1{color} | install |   1m 46s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 37s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   2m 46s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m 35s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests |  53m  4s | Tests failed in hadoop-hdfs. |
| | | 104m 37s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.server.blockmanagement.TestNodeCount |
|   | hadoop.hdfs.server.namenode.TestBackupNode |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12767098/HDFS-9249.002.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 52ac73f |
| Pre-patch Findbugs warnings | https://builds.apache.org/job/PreCommit-HDFS-Build/13034/artifact/patchprocess/trunkFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/13034/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/13034/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf901.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep
3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/13034/console |


This message was automatically generated.

> NPE thrown if an IOException is thrown in NameNode.<init>
> ---------------------------------------------------------
>
>                 Key: HDFS-9249
>                 URL: https://issues.apache.org/jira/browse/HDFS-9249
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.7.1
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>            Priority: Minor
>              Labels: supportability
>         Attachments: HDFS-9249.001.patch, HDFS-9249.002.patch
>
>
> This issue was found when running test case TestBackupNode.testCheckpointNode, but upon
closer look, the problem is not due to the test case.
> Looks like an IOException was thrown in
>     try {
>       initializeGenericKeys(conf, nsId, namenodeId);
>       initialize(conf);
>       try {
>         haContext.writeLock();
>         state.prepareToEnterState(haContext);
>         state.enterState(haContext);
>       } finally {
>         haContext.writeUnlock();
>       }
> causing the namenode to stop, but the namesystem was not yet properly instantiated, causing
NPE.
> I tried to reproduce locally, but to no avail.
> Because I could not reproduce the bug, and the log does not indicate what caused the
IOException, I suggest make this a supportability JIRA to log the exception for future improvement.
> Stacktrace
> java.lang.NullPointerException: null
> at org.apache.hadoop.hdfs.server.namenode.NameNode.getFSImage(NameNode.java:906)
> at org.apache.hadoop.hdfs.server.namenode.BackupNode.stop(BackupNode.java:210)
> at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:827)
> at org.apache.hadoop.hdfs.server.namenode.BackupNode.<init>(BackupNode.java:89)
> at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1474)
> at org.apache.hadoop.hdfs.server.namenode.TestBackupNode.startBackupNode(TestBackupNode.java:102)
> at org.apache.hadoop.hdfs.server.namenode.TestBackupNode.testCheckpoint(TestBackupNode.java:298)
> at org.apache.hadoop.hdfs.server.namenode.TestBackupNode.testCheckpointNode(TestBackupNode.java:130)
> The last few lines of log:
> 2015-10-14 19:45:07,807 INFO namenode.NameNode (NameNode.java:createNameNode(1422)) -
createNameNode [-checkpoint]
> 2015-10-14 19:45:07,807 INFO impl.MetricsSystemImpl (MetricsSystemImpl.java:init(158))
- CheckpointNode metrics system started (again)
> 2015-10-14 19:45:07,808 INFO namenode.NameNode (NameNode.java:setClientNamenodeAddress(402))
- fs.defaultFS is hdfs://localhost:37835
> 2015-10-14 19:45:07,808 INFO namenode.NameNode (NameNode.java:setClientNamenodeAddress(422))
- Clients are to use localhost:37835 to access this namenode/service.
> 2015-10-14 19:45:07,810 INFO hdfs.MiniDFSCluster (MiniDFSCluster.java:shutdown(1708))
- Shutting down the Mini HDFS Cluster
> 2015-10-14 19:45:07,810 INFO namenode.FSNamesystem (FSNamesystem.java:stopActiveServices(1298))
- Stopping services started for active state
> 2015-10-14 19:45:07,811 INFO namenode.FSEditLog (FSEditLog.java:endCurrentLogSegment(1228))
- Ending log segment 1
> 2015-10-14 19:45:07,811 INFO namenode.FSNamesystem (FSNamesystem.java:run(5306)) - NameNodeEditLogRoller
was interrupted, exiting
> 2015-10-14 19:45:07,811 INFO namenode.FSEditLog (FSEditLog.java:printStatistics(703))
- Number of transactions: 3 Total time for transactions(ms): 0 Number of transactions batched
in Syncs: 0 Number of syncs: 4 SyncTimes(ms): 2 1 
> 2015-10-14 19:45:07,811 INFO namenode.FSNamesystem (FSNamesystem.java:run(5373)) - LazyPersistFileScrubber
was interrupted, exiting
> 2015-10-14 19:45:07,822 INFO namenode.FileJournalManager (FileJournalManager.java:finalizeLogSegment(142))
- Finalizing edits file /data/jenkins/workspace/CDH5.5.0-Hadoop-HDFS-2.6.0/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/name1/current/edits_inprogress_0000000000000000001
-> /data/jenkins/workspace/CDH5.5.0-Hadoop-HDFS-2.6.0/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/name1/current/edits_0000000000000000001-0000000000000000003
> 2015-10-14 19:45:07,835 INFO namenode.FileJournalManager (FileJournalManager.java:finalizeLogSegment(142))
- Finalizing edits file /data/jenkins/workspace/CDH5.5.0-Hadoop-HDFS-2.6.0/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/name2/current/edits_inprogress_0000000000000000001
-> /data/jenkins/workspace/CDH5.5.0-Hadoop-HDFS-2.6.0/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/name2/current/edits_0000000000000000001-0000000000000000003
> 2015-10-14 19:45:07,836 INFO blockmanagement.CacheReplicationMonitor (CacheReplicationMonitor.java:run(169))
- Shutting down CacheReplicationMonitor
> 2015-10-14 19:45:07,836 INFO ipc.Server (Server.java:stop(2485)) - Stopping server on
37835
> 2015-10-14 19:45:07,837 INFO ipc.Server (Server.java:run(718)) - Stopping IPC Server
listener on 37835
> 2015-10-14 19:45:07,837 INFO ipc.Server (Server.java:run(844)) - Stopping IPC Server
Responder
> 2015-10-14 19:45:07,837 INFO blockmanagement.BlockManager (BlockManager.java:run(3781))
- Stopping ReplicationMonitor.
> 2015-10-14 19:45:07,838 WARN blockmanagement.DecommissionManager (DecommissionManager.java:run(78))
- Monitor interrupted: java.lang.InterruptedException: sleep interrupted
> 2015-10-14 19:45:07,844 INFO namenode.FSNamesystem (FSNamesystem.java:stopActiveServices(1298))
- Stopping services started for active state
> 2015-10-14 19:45:07,845 INFO namenode.FSNamesystem (FSNamesystem.java:stopStandbyServices(1386))
- Stopping services started for standby state
> 2015-10-14 19:45:07,848 INFO mortbay.log (Slf4jLog.java:info(67)) - Stopped HttpServer2$SelectChannelConnectorWithSafeStartup@localhost:0



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