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https://issues.apache.org/jira/browse/ZOOKEEPER-4005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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pengWei Dou updated ZOOKEEPER-4005:
-----------------------------------
Description:
The version 3.5.1 of ZK does not detect whether the snapshot file exists or
not. However, the snapshot file detection is added in the subsequent version.
When I tested the upgrade from 3.5.1 to 3.5.6, I found that after the
completion of ZK election, One of the ZK node has an error in the following
phase due to some network reasons, and then it will receive a diff reply. At
this time, both snapshotNeeded and isPreZAB1_0 are assigned to false. So,
none of snapshot file will be generated but a log file, which will cause the
startup failure after the upgrade.
was:
The 3.5.1 version of ZK does not detect whether the snapshot file exists or
not. However, the snapshot file detection is added in the subsequent version.
When I tested the upgrade from 3.5.1 to 3.5.6, I found that after the ZK
election is completed, One of the ZK nodes has an error in the following phase
due to some network reasons, and then it will receive a diff reply. At this
time, because of diff, snapshotNeeded is assigned as false, and isPreZAB1_0 is
also is assigned to false. At this time, no snapshot file will be generated,
but there will be a log file, which will cause the startup failure after the
upgrade is completed.
> Zookeeper will not sync snapshot while get DIFF and cause start failed.
> -----------------------------------------------------------------------
>
> Key: ZOOKEEPER-4005
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4005
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.5.1, 3.5.6
> Reporter: pengWei Dou
> Priority: Major
> Attachments: zookeeper-server.log
>
>
> The version 3.5.1 of ZK does not detect whether the snapshot file exists or
> not. However, the snapshot file detection is added in the subsequent version.
> When I tested the upgrade from 3.5.1 to 3.5.6, I found that after the
> completion of ZK election, One of the ZK node has an error in the following
> phase due to some network reasons, and then it will receive a diff reply. At
> this time, both snapshotNeeded and isPreZAB1_0 are assigned to false. So,
> none of snapshot file will be generated but a log file, which will cause the
> startup failure after the upgrade.
>
>
>
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