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https://issues.apache.org/jira/browse/CASSANDRA-13565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16064032#comment-16064032
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Tania S Engel commented on CASSANDRA-13565:
-------------------------------------------
To make an unwieldy "wide" partition, is the problem that we have too many
columns with potentially large varchar data? I am not sure how changing the key
to LogDay or LogHour would change the "width" of the partition.
> Materialized view usage of commit logs requires large mutation but
> commitlog_segment_size_in_mb=2048 causes exception
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-13565
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13565
> Project: Cassandra
> Issue Type: Bug
> Components: Configuration, Materialized Views, Streaming and
> Messaging
> Environment: Cassandra 3.9.0, Windows
> Reporter: Tania S Engel
> Attachments: CQLforTable.png
>
>
> We will be upgrading to 3.10 for CASSANDRA-11670. However, there is another
> scenario (not applyunsafe during JOIN) which leads to :
> java.lang.IllegalArgumentException: Mutation of 525.847MiB is too large
> for the maximum size of 512.000MiB
> at
> org.apache.cassandra.db.commitlog.CommitLog.add(CommitLog.java:262)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.db.Keyspace.apply(Keyspace.java:493)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.db.Keyspace.apply(Keyspace.java:396)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.db.Mutation.applyFuture(Mutation.java:215)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.db.Mutation.apply(Mutation.java:227)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.batchlog.BatchlogManager.store(BatchlogManager.java:147)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.service.StorageProxy.mutateMV(StorageProxy.java:797)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.db.view.ViewBuilder.buildKey(ViewBuilder.java:96)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.db.view.ViewBuilder.run(ViewBuilder.java:165)
> ~[apache-cassandra-3.9.0.jar:3.9.0]
> at
> org.apache.cassandra.db.compaction.CompactionManager$14.run(CompactionManager.java:1591)
> [apache-cassandra-3.9.0.jar:3.9.0]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> [na:1.8.0_66]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> [na:1.8.0_66]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> [na:1.8.0_66]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> [na:1.8.0_66]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_66]
> Due to the relationship of max_mutation_size_in_kb and
> commitlog_segment_size_in_mb, we increased commitlog_segment_size_in_mb and
> left Cassandra to calculate max_mutation_size_in_kb as half the size
> commitlog_segment_size_in_mb * 1024.
> However, we have found that if we set commitlog_segment_size_in_mb=2048 we
> get an exception upon starting Cassandra, when it is creating a new commit
> log.
> ERROR [COMMIT-LOG-ALLOCATOR] 2017-05-31 17:01:48,005
> JVMStabilityInspector.java:82 - Exiting due to error while processing commit
> log during initialization.
> org.apache.cassandra.io.FSWriteError: java.io.IOException: An attempt was
> made to move the file pointer before the beginning of the file
> Perhaps the index you are using is not big enough and it goes negative.
> Is the relationship between max_mutation_size_in_kb and
> commitlog_segment_size_in_mb important to preserve? In our limited stress
> test we are finding mutation size already over 512mb and we expect more data
> in our sstables and associated materialized views.
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