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https://issues.apache.org/jira/browse/DERBY-7017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16685368#comment-16685368
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Oskar Zinger commented on DERBY-7017:
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Thank Rick for the comment.
Since yesterday, we have changed from a _FREEZE_ call to using _SHUTDOWN URL_
call, and also performed a full upgrade of the actual database by connecting to
the database with *_upgrade=true_* and now it seems to work fine!
We always used shutdown before, but for some reason it stopped working when we
moved to 10.14.2.0 from 10.8.3.3. But as we found out yesterday, it required a
full upgrade of the Database as well, so once we went back to shutdown
mechanism and performed full upgrade of the database, looks like everything is
back to normal.
Regards,
Oskar Zinger
> Derby replication not working
> -----------------------------
>
> Key: DERBY-7017
> URL: https://issues.apache.org/jira/browse/DERBY-7017
> Project: Derby
> Issue Type: Bug
> Components: Network Server
> Affects Versions: 10.14.1.0, 10.14.2.0
> Environment: Linux
> Reporter: Geraldine
> Priority: Major
>
> I am running Apache Derby 10.14 on Linux and I intermittently (yet
> frequently) see an issue when trying to start derby replication:
> Attempt 1: ERRORCODE: 40000, SQLSTATE: XRE05, SQLERRMC: The log files on the
> master and slave are not in synch for replicated database 'ImpactDB'. The
> master log instant is 67:619207, whereas the slave log instant is 67:620032.
> This is fatal for replication - replication will be stopped.
> Attempt 2: ERRORCODE: 40000, SQLSTATE: XRE05, SQLERRMC: The log files on the
> master and slave are not in synch for replicated database 'ImpactDB'. The
> master log instant is 67:619207, whereas the slave log instant is 67:619207.
> This is fatal for replication - replication will be stopped.
> Attempt 3: ERRORCODE: 40000, SQLSTATE: XRE05, SQLERRMC: The log files on the
> master and slave are not in synch for replicated database 'ImpactDB'. The
> master log instant is 67:619207, whereas the slave log instant is 67:620406.
> This is fatal for replication - replication will be stopped.
> Attempt 4: ERRORCODE: 40000, SQLSTATE: XRE05, SQLERRMC: The log files on the
> master and slave are not in synch for replicated database 'ImpactDB'. The
> master log instant is 67:619207, whereas the slave log instant is 67:620780.
> This is fatal for replication - replication will be stopped.
> Before starting the slave, I freeze the master database. I ensure that no
> connections are made to the master and that all existing connections are
> closed. I wait for the disk to flush and then zip the derby files and copy to
> the slave host. I then start the slave (startSlave=true) followed by the
> master (startMaster=true).
> As you see each time, the slave log record number gets higher and higher.
> Yet, the master log record does not change as no change is made to the DB.
> When I look at the files on disk in the log and seg0 directories, they are
> the same.
> I turn on trace level logging for derby and I do not see any unexpected
> connections or SQL run during the replication attempt. Indeed, given the log
> record for the master stays unchanged it can be seen that nothing is changed
> in the database. The *.trace files show no activity between the FREEZE call
> and that start call.
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