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Jonathan Ellis commented on CASSANDRA-6403: ------------------------------------------- Fixed in cassandra-2.0 HEAD. Note that you probably shouldn't use multithreaded compaction. (CASSANDRA-6142) > Division by zero Exception in HintedHandoff and CompactionExecutor > ------------------------------------------------------------------ > > Key: CASSANDRA-6403 > URL: https://issues.apache.org/jira/browse/CASSANDRA-6403 > Project: Cassandra > Issue Type: Bug > Components: Core > Environment: Cassandra 2.0.3 RC, Linux (Ubuntu Precise), OpenJDK 7 > Reporter: Gabriel Wicke > > In write load testing I'm getting division by zero exceptions after running > for a while: > ERROR [HintedHandoff:2] 2013-11-23 20:44:41,411 CassandraDaemon.java (line > 187) Exception in thread Thread[HintedHandoff:2,1,main] > java.lang.RuntimeException: java.util.concurrent.ExecutionException: > java.lang.ArithmeticException: / by zero > at > org.apache.cassandra.db.HintedHandOffManager.doDeliverHintsToEndpoint(HintedHandOffManager.java:464) > at > org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpoint(HintedHandOffManager.java:309) > at > org.apache.cassandra.db.HintedHandOffManager.access$300(HintedHandOffManager.java:92) > at > org.apache.cassandra.db.HintedHandOffManager$4.run(HintedHandOffManager.java:530) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > at java.lang.Thread.run(Thread.java:724) > Caused by: java.util.concurrent.ExecutionException: > java.lang.ArithmeticException: / by zero > at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252) > at java.util.concurrent.FutureTask.get(FutureTask.java:111) > at > org.apache.cassandra.db.HintedHandOffManager.doDeliverHintsToEndpoint(HintedHandOffManager.java:460) > ... 6 more > ERROR [CompactionExecutor:8] 2013-11-23 21:34:01,493 CassandraDaemon.java > (line 187) Exception in thread Thread[CompactionExecutor:8,1,RMI Runtime] > java.lang.ArithmeticException: / by zero > at > org.apache.cassandra.db.compaction.ParallelCompactionIterable.<init>(ParallelCompactionIterable.java:59) > at > org.apache.cassandra.db.compaction.CompactionTask.runWith(CompactionTask.java:126) > at > org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48) > at > org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) > at > org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:60) > at > org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:59) > at > org.apache.cassandra.db.compaction.CompactionManager$6.runMayThrow(CompactionManager.java:296) > at > org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) > at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) > at java.util.concurrent.FutureTask.run(FutureTask.java:166) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > at java.lang.Thread.run(Thread.java:724) > The nodes that encounter this error seem to hold onto a lot of memory which > is not freed even after the write load is stopped. With the write load > continuing they eventually run out of heap. nodetool compact dies with the > same exception. -- This message was sent by Atlassian JIRA (v6.1#6144)