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From "Carl Yeksigian (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12397) Altering a column's type breaks commitlog replay
Date Wed, 28 Sep 2016 16:31:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15530155#comment-15530155
] 

Carl Yeksigian commented on CASSANDRA-12397:
--------------------------------------------

The longer term fix is removing support for altering types (CASSANDRA-12443) - if that ticket
does end up in 3.0, we won't need to handle the CL replay separately as it should no longer
be a problem.

> Altering a column's type breaks commitlog replay
> ------------------------------------------------
>
>                 Key: CASSANDRA-12397
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12397
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Carl Yeksigian
>            Assignee: Stefania
>
> When switching from a fixed-length column to a variable-length column, replaying the
commitlog on restart will have the same issue as CASSANDRA-11820. Seems like it is related
to the schema being flushed and used when restarted, but commitlogs having been written in
the old format.
> {noformat}
> org.apache.cassandra.db.commitlog.CommitLogReadHandler$CommitLogReadException: Unexpected
error deserializing mutation; saved to /tmp/mutation4816372620457789996dat.  This may be caused
by replaying a mutation against a table with the same name but incompatible schema.  Exception
follows: java.io.IOError: java.io.EOFException: EOF after 259 bytes out of 3336
>         at org.apache.cassandra.db.commitlog.CommitLogReader.readMutation(CommitLogReader.java:409)
[main/:na]
>         at org.apache.cassandra.db.commitlog.CommitLogReader.readSection(CommitLogReader.java:342)
[main/:na]
>         at org.apache.cassandra.db.commitlog.CommitLogReader.readCommitLogSegment(CommitLogReader.java:201)
[main/:na]
>         at org.apache.cassandra.db.commitlog.CommitLogReader.readAllFiles(CommitLogReader.java:84)
[main/:na]
>         at org.apache.cassandra.db.commitlog.CommitLogReplayer.replayFiles(CommitLogReplayer.java:139)
[main/:na]
>         at org.apache.cassandra.db.commitlog.CommitLog.recoverFiles(CommitLog.java:177)
[main/:na]
>         at org.apache.cassandra.db.commitlog.CommitLog.recoverSegmentsOnDisk(CommitLog.java:158)
[main/:na]
>         at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:316)
[main/:na]
>         at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:591)
[main/:na]
>         at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:720)
[main/:na]
> {noformat}



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