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https://issues.apache.org/jira/browse/ZOOKEEPER-3513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Norbert Kalmár resolved ZOOKEEPER-3513.
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Resolution: Duplicate
> Zookeeper upgrade fails due to missing snapshots
> ------------------------------------------------
>
> Key: ZOOKEEPER-3513
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3513
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.5.4, 3.6.0
> Reporter: Stephan Huttenhuis
> Priority: Major
>
> In ZOOKEEPER-2325 a check was added that requires a snapshot when loading
> data. We have been running 3-node ensembles on Zookeeper 3.4.13 for about 5
> months for use with Solr Cloud. During this time some ensembles created a few
> snapshots but other didn't generate any. Because of this upgrading to e.g.
> 3.5.5 fails.
> Either it is perfectly possible for Zookeeper data to have no snapshots or
> something is going wrong with generating snapshots. The ensembles are
> straightforward.
> - The following stack occurs:
> {noformat}
> java.io.IOException: No snapshot found, but there are log entries. Something
> is broken!
> at
> org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:211)
> at
> org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:240)
> at
> org.apache.zookeeper.server.ZooKeeperServer.loadData(ZooKeeperServer.java:290)
> at
> org.apache.zookeeper.server.ZooKeeperServer.startdata(ZooKeeperServer.java:450)
> at
> org.apache.zookeeper.server.NIOServerCnxnFactory.startup(NIOServerCnxnFactory.java:764)
> at
> org.apache.zookeeper.server.ServerCnxnFactory.startup(ServerCnxnFactory.java:98)
> at
> org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:144)
> at
> org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:106)
> at
> org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:64)
> at
> org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:128)
> at
> org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:82)
> {noformat}
> - The zoo.cfg
> {noformat}
> # The number of milliseconds of each tick
> tickTime=2000
> # The number of ticks that the initial
> # synchronization phase can take
> initLimit=10
> # The number of ticks that can pass between
> # sending a request and getting an acknowledgement
> syncLimit=5
> # the directory where the snapshot is stored.
> # do not use /tmp for storage, /tmp here is just
> # example sakes.
> dataDir=/data/zookeeper/data
> # the port at which the clients will connect
> clientPort=2181
> server.1=myserver1:2888:3888
> server.2=myserver2:2888:3888
> server.3=myserver3:2888:3888
> {noformat}
>
> - The contents of /data/zookeeper/data/version-2
> {noformat}
> -rw-r--r-- 1 zookeeper zookeeper 1 Aug 7 21:50 acceptedEpoch
> -rw-r--r-- 1 zookeeper zookeeper 1 Aug 8 20:38 currentEpoch
> -rw-r--r-- 1 zookeeper zookeeper 65M Apr 1 14:44 log.1
> -rw-r--r-- 1 zookeeper zookeeper 65M May 15 23:30 log.100000001
> -rw-r--r-- 1 zookeeper zookeeper 65M Jul 3 23:21 log.100001645
> -rw-r--r-- 1 zookeeper zookeeper 65M Aug 8 20:37 log.300000802
> -rw-r--r-- 1 zookeeper zookeeper 65M Aug 20 13:58 log.70000062a
> -rw-r--r-- 1 zookeeper zookeeper 65M Apr 4 21:22 log.f0
> {noformat}
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