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https://issues.apache.org/jira/browse/CASSANDRA-20600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17948579#comment-17948579
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Jeremiah Jordan commented on CASSANDRA-20600:
---------------------------------------------
I haven't gone through everything to know if other things could move. For the
most part validation should go in validate. Validate failing will throw an
exception back to an end user telling them why the statement was bad. Options
conditional on configuration should usually be checked in validate.
> DB Crashes on startup if accord tables exist but accord is disabled
> -------------------------------------------------------------------
>
> Key: CASSANDRA-20600
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20600
> Project: Apache Cassandra
> Issue Type: Bug
> Components: Accord
> Reporter: Jon Haddad
> Priority: Normal
>
> We should at least have a clear message why the DB isn't starting instead of
> an exception so the user knows this isn't a bug.
> I'm not sure if there's a better approach other than an error. Backing out
> of accord by disabling the config while there's tables seems like a
> significant user error so preventing startup might be the only sane thing we
> can do.
> {noformat}
> ERROR [main] 2025-04-25T14:01:08,040 CassandraDaemon.java:926 - Exception
> encountered during startup
> java.lang.IllegalStateException: Can't dereference Success for a rejected
> execution: INVALID: Cannot create table games.user_scores with transactional
> mode full with accord.enabled set to false
> at
> org.apache.cassandra.tcm.Transformation$Rejected.success(Transformation.java:177)
> at org.apache.cassandra.tcm.log.LogState.flatten(LogState.java:112)
> at
> org.apache.cassandra.tcm.log.LocalLog.replayPersisted(LocalLog.java:597)
> at org.apache.cassandra.tcm.log.LocalLog.ready(LocalLog.java:679)
> at
> org.apache.cassandra.tcm.Startup.initializeAsNonCmsNode(Startup.java:162)
> at org.apache.cassandra.tcm.Startup.initialize(Startup.java:110)
> at org.apache.cassandra.tcm.Startup.initialize(Startup.java:91)
> at
> org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:274)
> at
> org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:745)
> at
> org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:899)
> {noformat}
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