Hi Nikhil,
If you haven’t already done so I would recommend logging Cassandra project
JIRA for this issue - it looks like a defect to me and occurring during
compaction will probably be hard to work around. If you can work out what
table is being compacted when the issue occurs and include the schema of
the table that might help.
Beyond that the only thing I can think of is running scrub if you haven’t
already done so.
Cheers
Ben
On Mon, 26 Sep 2016 at 16:36 Nikhil Sharma <nikhils...@gmail.com> wrote:
> Hi,
>
> We are not exactly sure what is causing this problem. But after compaction
> happens (after 1 week ttl). We start getting this exception:
>
> WARN [SharedPool-Worker-1] 2016-09-26 04:07:19,849
> AbstractLocalAwareExecutorService.java:169 - Uncaught exception on thread
> Thread[SharedPool-Worker-1,5,main]: {}
> java.lang.NullPointerException: null
> at
> org.apache.cassandra.db.Slices$ArrayBackedSlices$ComponentOfSlice.isEQ(Slices.java:748)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.Slices$ArrayBackedSlices.toCQLString(Slices.java:659)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.filter.ClusteringIndexSliceFilter.toCQLString(ClusteringIndexSliceFilter.java:150)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.SinglePartitionReadCommand.appendCQLWhereClause(SinglePartitionReadCommand.java:911)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.ReadCommand.toCQLString(ReadCommand.java:560)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.ReadCommand$1MetricRecording.onClose(ReadCommand.java:506)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.transform.BasePartitions.runOnClose(BasePartitions.java:70)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.transform.BaseIterator.close(BaseIterator.java:76)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.ReadCommandVerbHandler.doVerb(ReadCommandVerbHandler.java:48)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:67)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> ~[na:1.8.0_102]
> at
> org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:164)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$LocalSessionFutureTask.run(AbstractLocalAwareExecutorService.java:136)
> [apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-3.0.9.jar:3.0.9]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_102]
> WARN [SharedPool-Worker-2] 2016-09-26 04:07:20,639
> AbstractLocalAwareExecutorService.java:169 - Uncaught exception on thread
> Thread[SharedPool-Worker-2,5,main]: {}
> java.lang.RuntimeException: java.lang.NullPointerException
> at
> org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2470)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> ~[na:1.8.0_102]
> at
> org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:164)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$LocalSessionFutureTask.run(AbstractLocalAwareExecutorService.java:136)
> [apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-3.0.9.jar:3.0.9]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_102]
> Caused by: java.lang.NullPointerException: null
> at
> org.apache.cassandra.db.Slices$ArrayBackedSlices$ComponentOfSlice.isEQ(Slices.java:748)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.Slices$ArrayBackedSlices.toCQLString(Slices.java:659)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.filter.ClusteringIndexSliceFilter.toCQLString(ClusteringIndexSliceFilter.java:150)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.SinglePartitionReadCommand.appendCQLWhereClause(SinglePartitionReadCommand.java:911)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.ReadCommand.toCQLString(ReadCommand.java:560)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.ReadCommand$1MetricRecording.onClose(ReadCommand.java:506)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.transform.BasePartitions.runOnClose(BasePartitions.java:70)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.db.transform.BaseIterator.close(BaseIterator.java:76)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:1797)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> at
> org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2466)
> ~[apache-cassandra-3.0.9.jar:3.0.9]
> ... 5 common frames omitted
>
>
> We have no idea how to solve this. I am losing sleep over this, please
> help!
>
> Cassandra: 3.0.9 (also happened in 3.0.8)
> Java: Oracle jdk "1.8.0_102"
> jemalloc enabled
>
>
> Regards,
>
> Nikhil Sharma
>
--
————————
Ben Slater
Chief Product Officer
Instaclustr: Cassandra + Spark - Managed | Consulting | Support
+61 437 929 798
