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Posted to issues@zookeeper.apache.org by "Zili Chen (Jira)" <ji...@apache.org> on 2022/03/14 05:03:00 UTC
[jira] [Resolved] (ZOOKEEPER-4493) ZK downgrade from 3.6.3 to 3.4.13 is not working
[ https://issues.apache.org/jira/browse/ZOOKEEPER-4493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zili Chen resolved ZOOKEEPER-4493.
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Resolution: Not A Bug
This is not a bug. If you're looking for use cases and best practice, you can join user mailing list (https://zookeeper.apache.org/lists.html) and asked there. It should be the fastest way to get help.
> ZK downgrade from 3.6.3 to 3.4.13 is not working
> ------------------------------------------------
>
> Key: ZOOKEEPER-4493
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4493
> Project: ZooKeeper
> Issue Type: Bug
> Affects Versions: 3.4.13
> Reporter: Prem Kumar
> Priority: Major
>
> Hi Team,
> I have upgraded my zk cluster from 3.4.13 to 3.6.3 and it was successful. when i am trying to rollback from 3.6.3 to 3.4.13, i am facing some issues and it was not successful.
> Can someone help me on this issue?
>
> *Logs:*
> 2022-02-10 12:50:37,532 [myid:3] - INFO [main:QuorumPeer@1178] - minSessionTimeout set to 4000
> 2022-02-10 12:50:37,533 [myid:3] - INFO [main:QuorumPeer@1189] - maxSessionTimeout set to 40000
> 2022-02-10 12:50:37,540 [myid:3] - INFO [main:QuorumPeer@1467] - QuorumPeer communication is not secured!
> 2022-02-10 12:50:37,541 [myid:3] - INFO [main:QuorumPeer@1496] - quorum.cnxn.threads.size set to 20
> 2022-02-10 12:50:37,551 [myid:3] - INFO [main:FileSnap@86] - Reading snapshot /zk/version-2/snapshot.18000000bd
> 2022-02-10 12:50:37,641 [myid:3] - ERROR [main:QuorumPeer@692] - Unable to load database on disk
> *java.io.IOException: Unsupported Txn with type=%d15*
> at org.apache.zookeeper.server.util.SerializeUtils.deserializeTxn(SerializeUtils.java:89)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.next(FileTxnLog.java:641)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.init(FileTxnLog.java:556)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.<init>(FileTxnLog.java:531)
> at org.apache.zookeeper.server.persistence.FileTxnLog.read(FileTxnLog.java:358)
> at org.apache.zookeeper.server.persistence.FileTxnSnapLog.fastForwardFromEdits(FileTxnSnapLog.java:193)
> at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:176)
> at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:217)
> at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:645)
> at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:635)
> at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:170)
> at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:114)
> at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:81)
> 2022-02-10 12:50:37,643 [myid:3] - ERROR [main:QuorumPeerMain@92] - Unexpected exception, exiting abnormally
> java.lang.RuntimeException: Unable to run quorum server
> at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:693)
> at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:635)
> at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:170)
> at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:114)
> at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:81)
> *Caused by: java.io.IOException: Unsupported Txn with type=%d15*
> at org.apache.zookeeper.server.util.SerializeUtils.deserializeTxn(SerializeUtils.java:89)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.next(FileTxnLog.java:641)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.init(FileTxnLog.java:556)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.<init>(FileTxnLog.java:531)
> at org.apache.zookeeper.server.persistence.FileTxnLog.read(FileTxnLog.java:358)
> at org.apache.zookeeper.server.persistence.FileTxnSnapLog.fastForwardFromEdits(FileTxnSnapLog.java:193)
> at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:176)
> at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:217)
> at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:645)
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