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From Ali Akhtar <ali.rac...@gmail.com>
Subject CommitLogReadHandler$CommitLogReadException: Unexpected error deserializing mutation
Date Mon, 24 Oct 2016 02:18:27 GMT
I have a single node cassandra installation on my dev laptop, which is used
just for dev / testing.

Recently, whenever I restart my laptop, Cassandra fails to start when I run
it via 'sudo service cassandra start'.

Doing a tail on /var/log/cassandra/system.log gives this log:

*INFO  [main] 2016-10-24 07:08:02,950 CommitLog.java:166 - Replaying
/var/lib/cassandra/commitlog/CommitLog-6-1476907676969.log,
/var/lib/cassandra/commitlog/CommitLog-6-1476907676970.log,
/var/lib/cassandra/commitlog/CommitLog-6-1477269052845.log*
*ERROR [main] 2016-10-24 07:08:03,357 JVMStabilityInspector.java:82 -
Exiting due to error while processing commit log during initialization.*
*org.apache.cassandra.db.commitlog.CommitLogReadHandler$CommitLogReadException:
Unexpected error deserializing mutation; saved to
/tmp/mutation9186356142128811141dat.  This may be caused by replaying a
mutation against a table with the same name but incompatible schema.
Exception follows: org.apache.cassandra.serializers.MarshalException: Not
enough bytes to read 0th field board_id*
* at
org.apache.cassandra.db.commitlog.CommitLogReader.readMutation(CommitLogReader.java:410)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.db.commitlog.CommitLogReader.readSection(CommitLogReader.java:343)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.db.commitlog.CommitLogReader.readCommitLogSegment(CommitLogReader.java:202)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.db.commitlog.CommitLogReader.readAllFiles(CommitLogReader.java:85)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.db.commitlog.CommitLogReplayer.replayFiles(CommitLogReplayer.java:135)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.db.commitlog.CommitLog.recoverFiles(CommitLog.java:187)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.db.commitlog.CommitLog.recoverSegmentsOnDisk(CommitLog.java:167)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:323)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:601)
[apache-cassandra-3.9.jar:3.9]*
* at
org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:730)
[apache-cassandra-3.9.jar:3.9]*


I then have to do 'sudo rm -rf /var/lib/cassandra/commitlog/*' which fixes
the problem, but then I lose all of my data.

It looks like its saying there wasn't enough data to read the field
'board_id', any ideas why that would be?

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