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Posted to commits@cassandra.apache.org by "Philip Thompson (JIRA)" <ji...@apache.org> on 2016/07/15 18:52:20 UTC
[jira] [Commented] (CASSANDRA-12215) Read failure in cqlsh
[ https://issues.apache.org/jira/browse/CASSANDRA-12215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15379904#comment-15379904 ]
Philip Thompson commented on CASSANDRA-12215:
---------------------------------------------
Can we get the schema for this table? Thanks!
> Read failure in cqlsh
> ----------------------
>
> Key: CASSANDRA-12215
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12215
> Project: Cassandra
> Issue Type: Bug
> Components: Compaction
> Environment: Cassandra 3.0.8, cqlsh 5.0.1
> Reporter: Hau Phan
> Fix For: 3.0.x
>
>
> Running 3.0.8 on a single standalone node with cqlsh 5.0.1, the keyspace RF = 1 and class SimpleStrategy.
> Attempting to run a 'select * from <table>' and receiving this error:
> ReadFailure: code=1300 [Replica(s) failed to execute read] message="Operation failed - received 0 responses and 1 failures" info={'failures': 1, 'received_responses': 0, 'required_responses': 1, 'consistency': 'ONE'}
> Cassandra system.log prints this:
> {code}
> ERROR [CompactionExecutor:5] 2016-07-15 13:42:13,219 CassandraDaemon.java:201 - Exception in thread Thread[CompactionExecutor:5,1,main]
> java.lang.NullPointerException: null
> at org.apache.cassandra.db.transform.UnfilteredRows.isEmpty(UnfilteredRows.java:58) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.db.partitions.PurgeFunction.applyToPartition(PurgeFunction.java:64) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.db.partitions.PurgeFunction.applyToPartition(PurgeFunction.java:24) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.db.transform.BasePartitions.hasNext(BasePartitions.java:96) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.db.compaction.CompactionIterator.hasNext(CompactionIterator.java:226) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.db.compaction.CompactionTask.runMayThrow(CompactionTask.java:177) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:78) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:60) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:263) ~[apache-cassandra-3.0.8.jar:3.0.8]
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_65]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_65]
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_65]
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_65]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_65]
> {code}
> Doing a sstabledump -d shows a few rows with the column value of "<tombstone>", telling me compaction doesn't seem to be working correctly.
> # nodetool compactionstats
> pending tasks: 1
> attempting to run a compaction gets:
> # nodetool compact <table> <cf>
> error: null
> -- StackTrace --
> java.lang.NullPointerException
> at org.apache.cassandra.db.transform.UnfilteredRows.isEmpty(UnfilteredRows.java:58)
> at org.apache.cassandra.db.partitions.PurgeFunction.applyToPartition(PurgeFunction.java:64)
> at org.apache.cassandra.db.partitions.PurgeFunction.applyToPartition(PurgeFunction.java:24)
> at org.apache.cassandra.db.transform.BasePartitions.hasNext(BasePartitions.java:96)
> at org.apache.cassandra.db.compaction.CompactionIterator.hasNext(CompactionIterator.java:226)
> at org.apache.cassandra.db.compaction.CompactionTask.runMayThrow(CompactionTask.java:177)
> at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
> at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:78)
> at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:60)
> at org.apache.cassandra.db.compaction.CompactionManager$8.runMayThrow(CompactionManager.java:606)
> at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Since the table is pretty small, I can do a copy to, truncate the table, and copy from, and the table is fine. But my concern is if compaction fails to remove those rows, and the table will eventually be very large in a production environment, the copy, truncate, and copy will no longer be an option.
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