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https://issues.apache.org/jira/browse/ZOOKEEPER-2307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17436428#comment-17436428
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Yong-Hao Zou commented on ZOOKEEPER-2307:
-----------------------------------------
I still got this issue in 3.7.0, did this really resolved?
{code:java}
2021-10-31 16:28:38,778 [myid:5] - INFO [main:SnapStream@61] -
zookeeper.snapshot.compression.method = CHECKED
2021-10-31 16:28:38,779 [myid:5] - INFO [main:FileSnap@85] - Reading snapshot
data5/version-2/snapshot.100000003
2021-10-31 16:28:38,782 [myid:5] - INFO [main:DataTree@1709] - The digest in
the snapshot has digest version of 2, , with zxid as 0x100000003, and digest
value as 6044988169
2021-10-31 16:28:38,789 [myid:5] - INFO [main:FileTxnSnapLog@372] - 1 txns
loaded in 2 ms
2021-10-31 16:28:38,789 [myid:5] - INFO [main:ZKDatabase@290] - Snapshot
loaded in 14 ms, highest zxid is 0x200000001, digest is 6044988169
2021-10-31 16:28:38,790 [myid:5] - ERROR [main:QuorumPeer@1191] - Unable to
load database on disk
java.io.IOException: The accepted epoch, 2 is less than the current epoch, 16
at
org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:1188)
at
org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:1130)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:229)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:137)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:91)
2021-10-31 16:28:38,793 [myid:5] - ERROR [main:QuorumPeerMain@114] - Unexpected
exception, exiting abnormally
java.lang.RuntimeException: Unable to run quorum server
at
org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:1192)
at
org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:1130)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:229)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:137)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:91)
Caused by: java.io.IOException: The accepted epoch, 2 is less than the current
epoch, 16
at
org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:1188)
... 4 more
2021-10-31 16:28:38,793 [myid:5] - INFO [main:ZKAuditProvider@42] - ZooKeeper
audit is disabled.
2021-10-31 16:28:38,795 [myid:5] - ERROR [main:ServiceUtils@42] - Exiting JVM
with code 1
{code}
> ZooKeeper not starting because acceptedEpoch is less than the currentEpoch
> --------------------------------------------------------------------------
>
> Key: ZOOKEEPER-2307
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2307
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Reporter: Mohammad Arshad
> Assignee: Mohammad Arshad
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.6.3, 3.7.0, 3.5.8
>
> Attachments: ZOOKEEPER-2307-01.patch, ZOOKEEPER-2307-02.patch,
> ZOOKEEPER-2307-03.patch, ZOOKEEPER-2307-04.patch
>
> Time Spent: 3h 40m
> Remaining Estimate: 0h
>
> This issue occurred in one of our test environment where disk was being
> changed to read only very frequently.
> The the scenario is as follows:
> # Configure three node ZooKeeper cluster, lets say nodes are A, B and C
> # Start A and B. Both A and B start successfully, quorum is running.
> # Start C, because of IO error C fails to update acceptedEpoch file. But C
> also starts successfully, joins the quorum as follower
> # Stop C
> # Start C, bellow exception with message "The accepted epoch, 0 is less than
> the current epoch, 1" is thrown
> {code}
> 2015-10-29 16:52:32,942 [myid:3] - ERROR [main:QuorumPeer@784] - Unable to
> load database on disk
> java.io.IOException: The accepted epoch, 0 is less than the current epoch, 1
> at
> org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:781)
> at
> org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:720)
> at
> org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:202)
> at
> org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:139)
> at
> org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:88)
> 2015-10-29 16:52:32,946 [myid:3] - ERROR [main:QuorumPeerMain@111] -
> Unexpected exception, exiting abnormally
> java.lang.RuntimeException: Unable to run quorum server
> at
> org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:785)
> at
> org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:720)
> at
> org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:202)
> at
> org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:139)
> at
> org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:88)
> Caused by: java.io.IOException: The accepted epoch, 0 is less than the
> current epoch, 1
> at
> org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:781)
> {code}
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