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https://issues.apache.org/jira/browse/HDFS-5291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13793192#comment-13793192
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Aaron T. Myers commented on HDFS-5291:
--------------------------------------
Is my understanding of this issue correct that the only thing we're trying to
fix here is the fact the clients are not retrying attempting to talk to the
active NN when it receives a safemode exception? i.e. it's not the case that
the standby NN is somehow incorrectly going into safemode after a failover? If
so, then I agree with Vinay that we should update the summary and description
of this JIRA, because it's currently rather confusing.
> Standby namenode after transition to active goes into safemode
> --------------------------------------------------------------
>
> Key: HDFS-5291
> URL: https://issues.apache.org/jira/browse/HDFS-5291
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha
> Affects Versions: 2.1.1-beta
> Reporter: Arpit Gupta
> Assignee: Jing Zhao
> Priority: Critical
> Fix For: 2.2.1
>
> Attachments: HDFS-5291.000.patch, HDFS-5291.001.patch,
> HDFS-5291.002.patch, HDFS-5291.003.patch, HDFS-5291.003.patch, nn.log
>
>
> Some log snippets
> standby state to active transition
> {code}
> 2013-10-02 00:13:49,482 INFO ipc.Server (Server.java:run(2068)) - IPC Server
> handler 69 on 8020, call
> org.apache.hadoop.hdfs.protocol.ClientProtocol.renewLease from IP:33911
> Call#1483 Retry#1: error: org.apache.hadoop.ipc.StandbyException: Operation
> category WRITE is not supported in state standby
> 2013-10-02 00:13:49,689 INFO ipc.Server (Server.java:saslProcess(1342)) -
> Auth successful for nn/hostn...@example.com (auth:SIMPLE)
> 2013-10-02 00:13:49,696 INFO authorize.ServiceAuthorizationManager
> (ServiceAuthorizationManager.java:authorize(111)) - Authorization successful
> for nn/hostn...@example.com (auth:KERBEROS) for protocol=interface
> org.apache.hadoop.ha.HAServiceProtocol
> 2013-10-02 00:13:49,700 INFO namenode.FSNamesystem
> (FSNamesystem.java:stopStandbyServices(1013)) - Stopping services started for
> standby state
> 2013-10-02 00:13:49,701 WARN ha.EditLogTailer
> (EditLogTailer.java:doWork(336)) - Edit log tailer interrupted
> java.lang.InterruptedException: sleep interrupted
> at java.lang.Thread.sleep(Native Method)
> at
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:334)
> at
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$200(EditLogTailer.java:279)
> at
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:296)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:356)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1463)
> at
> org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:454)
> at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTail
> 2013-10-02 00:13:49,704 INFO namenode.FSNamesystem
> (FSNamesystem.java:startActiveServices(885)) - Starting services required for
> active state
> 2013-10-02 00:13:49,719 INFO client.QuorumJournalManager
> (QuorumJournalManager.java:recoverUnfinalizedSegments(419)) - Starting
> recovery process for unclosed journal segments...
> 2013-10-02 00:13:49,755 INFO ipc.Server (Server.java:saslProcess(1342)) -
> Auth successful for hbase/hostn...@example.com (auth:SIMPLE)
> 2013-10-02 00:13:49,761 INFO authorize.ServiceAuthorizationManager
> (ServiceAuthorizationManager.java:authorize(111)) - Authorization successful
> for hbase/hostn...@example.com (auth:KERBEROS) for protocol=interface
> org.apache.hadoop.hdfs.protocol.ClientProtocol
> 2013-10-02 00:13:49,839 INFO client.QuorumJournalManager
> (QuorumJournalManager.java:recoverUnfinalizedSegments(421)) - Successfully
> started new epoch 85
> 2013-10-02 00:13:49,839 INFO client.QuorumJournalManager
> (QuorumJournalManager.java:recoverUnclosedSegment(249)) - Beginning recovery
> of unclosed segment starting at txid 887112
> 2013-10-02 00:13:49,874 INFO client.QuorumJournalManager
> (QuorumJournalManager.java:recoverUnclosedSegment(258)) - Recovery prepare
> phase complete. Responses:
> IP:8485: segmentState { startTxId: 887112 endTxId: 887531 isInProgress: true
> } lastWriterEpoch: 84 lastCommittedTxId: 887530
> 172.18.145.97:8485: segmentState { startTxId: 887112 endTxId: 887531
> isInProgress: true } lastWriterEpoch: 84 lastCommittedTxId: 887530
> 2013-10-02 00:13:49,875 INFO client.QuorumJournalManager
> (QuorumJournalManager.java:recover
> {code}
> And then we get into safemode
> {code}
> Construction[IP:1019|RBW]]} size 0
> 2013-10-02 00:13:50,277 INFO BlockStateChange
> (BlockManager.java:logAddStoredBlock(2237)) - BLOCK* addStoredBlock: blockMap
> updated: IP:1019 is added to blk_IP157{blockUCState=UNDER_CONSTRUCTION,
> primaryNodeIndex=-1, replicas=[ReplicaUnderConstruction[IP:1019|RBW],
> ReplicaUnderConstruction[172.18.145.96:1019|RBW], ReplicaUnde
> rConstruction[IP:1019|RBW]]} size 0
> 2013-10-02 00:13:50,279 INFO hdfs.StateChange
> (FSNamesystem.java:reportStatus(4703)) - STATE* Safe mode ON.
> The reported blocks 1071 needs additional 5 blocks to reach the threshold
> 1.0000 of total blocks 1075.
> Safe mode will be turned off automatically
> 2013-10-02 00:13:50,279 INFO BlockStateChange
> (BlockManager.java:logAddStoredBlock(2237)) - BLOCK* addStoredBlock: blockMap
> updated: IP:1019 is added to blk_IP158{blockUCState=UNDER_CONSTRUCTION,
> primaryNodeIndex=-1,
> replicas=[ReplicaUnderConstruction[172.18.145.99:1019|RBW],
> ReplicaUnderConstruction[172.18.145.97:1019|RBW],
> ReplicaUnderConstruction[IP:1019|RBW]]} size 0
> 2013-10-02 00:13:50,280 INFO BlockStateChange
> (BlockManager.java:logAddStoredBlock(2237)) - BLOCK* addStoredBlock: blockMap
> updated: 172.18.145.99:1019 is added to
> blk_IP158{blockUCState=UNDER_CONSTRUCTION, primaryNodeIndex=-1,
> replicas=[ReplicaUnderConstruction[172.18.145.99:1019|RBW],
> ReplicaUnderConstruction[172.18.145.97:1019|RBW],
> ReplicaUnderConstruction[IP:1019|RBW]]} size 0
> 2013-10-02 00:13:50,281 INFO BlockStateChange
> (BlockManager.java:logAddStoredBlock(2237)) - BLOCK* addStoredBlock: blockMap
> updated: 172.18.145.97:1019 is added to
> blk_IP158{blockUCState=UNDER_CONSTRUCTION, primaryNodeIndex=-1,
> replicas=[ReplicaUnderConstruction[172.18.145.99:1019|RBW],
> ReplicaUnderConstruction[172.18.145.97:1019|RBW],
> ReplicaUnderConstruction[IP:1019|RBW]]} size 0
> {code}
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