[
https://issues.apache.org/jira/browse/HDFS-6113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13939385#comment-13939385
]
Kihwal Lee commented on HDFS-6113:
----------------------------------
Live upgrades from 2.x to trunk is not supported. This has nothing to do with
the rolling upgrade feature. Whenever there is incompatible changes, live
upgrades may not work.
The rolling upgrade feature provides a safe mechanism to upgrade or downgrade
and also minimizes impact on service and data availability while doing live
upgrades. In order to take advantage of it, both new & old version of software
must have this feature. Also, the two version should be compatible. For more
details on the compatibility between versions, please refer to the design
documentation of HDFS-5535.
> Rolling upgrae exception
> ------------------------
>
> Key: HDFS-6113
> URL: https://issues.apache.org/jira/browse/HDFS-6113
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Fengdong Yu
>
> I've a hadoop-2.3 running non-securable on the cluster. then I built a trunk
> instance, also non securable.
> NN1 - active
> NN2 - standby
> DN1 - datanode
> DN2 - datanode
> JN1,JN2,JN3 - Journal and ZK
> then on the NN2:
> {code}
> hadoop-dameon.sh stop namenode
> hadoop-dameon.sh stop zkfc
> {code}
> then:
> change the environment variables to the new hadoop.(trunk version)
> then:
> {code}
> hadoop-dameon.sh start namenode
> {code}
> NN2 throws exception:
> {code}
> org.apache.hadoop.hdfs.qjournal.client.QuorumException: Could not journal
> CTime for one more JournalNodes. 1 exceptions thrown:
> 10.100.91.33:8485: Failed on local exception: java.io.EOFException; Host
> Details : local host is: "10-204-8-136/10.204.8.136"; destination host is:
> "jn33.com":8485;
> at
> org.apache.hadoop.hdfs.qjournal.client.QuorumException.create(QuorumException.java:81)
> at
> org.apache.hadoop.hdfs.qjournal.client.QuorumCall.rethrowException(QuorumCall.java:223)
> at
> org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.getJournalCTime(QuorumJournalManager.java:631)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.getSharedLogCTime(FSEditLog.java:1383)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.initEditLog(FSImage.java:738)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:600)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.doUpgrade(FSImage.java:360)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:258)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:894)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:653)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:444)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:500)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:656)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:641)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1294)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1360)
> {code}
> JN throws Exception:
> {code}
> 2014-03-18 12:19:01,960 INFO org.apache.hadoop.ipc.Server: IPC Server
> listener on 8485: readAndProcess threw exception java.io.IOException: Unable
> to read authentication method from client 10.204.8.136. Count of bytes read: 0
> java.io.IOException: Unable to read authentication method
> at
> org.apache.hadoop.ipc.Server$Connection.readAndProcess(Server.java:1344)
> at org.apache.hadoop.ipc.Server$Listener.doRead(Server.java:761)
> at
> org.apache.hadoop.ipc.Server$Listener$Reader.doRunLoop(Server.java:560)
> at org.apache.hadoop.ipc.Server$Listener$Reader.run(Server.java:535)
> 2014-03-18 12:19:01,960 DEBUG org.apache.hadoop.ipc.Server: IPC Server
> listener on 8485: disconnecting client 10.204.8.136:39063. Number of active
> connections: 1
> {code}
--
This message was sent by Atlassian JIRA
(v6.2#6252)
