[jira] [Created] (ZOOKEEPER-4493) ZK downgrade from 3.6.3 to 3.4.13 is not working

["Prem Kumar (Jira)" <ji...@apache.org>]

Prem Kumar created ZOOKEEPER-4493:
-------------------------------------

             Summary: 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


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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