Benjamin Roth created CASSANDRA-12530:
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Summary: NPE in MutationStage after WriteTimeoutException
Key: CASSANDRA-12530
URL: https://issues.apache.org/jira/browse/CASSANDRA-12530
Project: Cassandra
Issue Type: Bug
Components: Local Write-Read Paths
Reporter: Benjamin Roth
I observed a situation where nodes seem to be overloaded by MV updates
(probably). This produces tons of exceptions like the following.
I guess the WriteTimeoutExceptions come from updates on remote hosts during the
MV-write-path. So far so good - shit happens in an overloaded system. But the
following NPE is probably not really intended and a follow-up exception of the
timed out write.
2016-08-24T12:22:45+00:00 cas5 [MutationStage-25]
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService Uncaught
exception on thread Thread[MutationStage-25,5,main]: {}
2016-08-24T12:22:45+00:00 cas5
#011org.apache.cassandra.exceptions.WriteTimeoutException: Operation timed out
- received only 0 responses.
2016-08-24T12:22:45+00:00 cas5 #011at
org.apache.cassandra.db.Keyspace.apply(Keyspace.java:486)
2016-08-24T12:22:45+00:00 cas5 #011at
org.apache.cassandra.db.Keyspace.lambda$apply$0(Keyspace.java:495)
2016-08-24T12:22:45+00:00 cas5 #011at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
2016-08-24T12:22:45+00:00 cas5 #011at
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:162)
2016-08-24T12:22:45+00:00 cas5 #011at
org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:109)
2016-08-24T12:22:45+00:00 cas5 #011at java.lang.Thread.run(Thread.java:745)
2016-08-24T12:22:45+00:00 cas5 [MutationStage-31]
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService Uncaught
exception on thread Thread[MutationStage-31,5,main]: {}
2016-08-24T12:22:45+00:00 cas5
#011org.apache.cassandra.exceptions.WriteTimeoutException: Operation timed out
- received only 0 responses.
2016-08-24T12:22:45+00:00 cas5 #011at
org.apache.cassandra.db.Keyspace.apply(Keyspace.java:486)
2016-08-24T12:22:45+00:00 cas5 #011at
org.apache.cassandra.db.Keyspace.lambda$apply$0(Keyspace.java:495)
2016-08-24T12:22:45+00:00 cas5 #011at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
2016-08-24T12:22:45+00:00 cas5 #011at
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:162)
2016-08-24T12:22:45+00:00 cas5 #011at
org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:109)
2016-08-24T12:22:45+00:00 cas5 #011at java.lang.Thread.run(Thread.java:745)
2016-08-24T12:22:45+00:00 cas5 [MutationStage-7]
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService Uncaught
exception on thread Thread[MutationStage-7,5,main]: {}
2016-08-24T12:22:45+00:00 cas5 #011java.lang.NullPointerException: null
2016-08-24T12:22:45+00:00 cas5 [MutationStage-32]
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService Uncaught
exception on thread Thread[MutationStage-32,5,main]: {}
2016-08-24T12:22:45+00:00 cas5 #011java.lang.NullPointerException: null
2016-08-24T12:22:45+00:00 cas5 [MutationStage-9]
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService Uncaught
exception on thread Thread[MutationStage-9,5,main]: {}
2016-08-24T12:22:45+00:00 cas5 #011java.lang.NullPointerException: null
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