Paulo Motta created CASSANDRA-10827:
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Summary: Counter mutation lock timeout prints ugly exception
Key: CASSANDRA-10827
URL: https://issues.apache.org/jira/browse/CASSANDRA-10827
Project: Cassandra
Issue Type: Bug
Components: Coordination
Reporter: Paulo Motta
Priority: Minor
If the coordinator is a replica of the counter shard, the {{StorageProxy}}
counter write is submitted to the counter mutation stage.
In case the write times out because it cannot acquire the lock, the
{{StorageProxy}} sends a {{WriteTimeout}} to the client, but the
{{DroppableRunnable}} also throws an uncaught exception that is printed in the
logs:
{noformat}
WARN [SharedPool-Worker-55] 2015-12-03 02:53:53,086
AbstractTracingAwareExecutorService.java:169 - Uncaught exception on thread
Thread[SharedPool-Worker-55,5,main]: {}
java.lang.RuntimeException:
org.apache.cassandra.exceptions.WriteTimeoutException: Operation timed out -
received only 0 responses.
at
org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2191)
~[cassandra-all-2.1.8.689.jar:2.1.8.689]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
~[na:1.8.0_60]
at
org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164)
~[cassandra-all-2.1.8.689.jar:2.1.8.689]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
[cassandra-all-2.1.8.689.jar:2.1.8.689]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60]
Caused by: org.apache.cassandra.exceptions.WriteTimeoutException: Operation
timed out - received only 0 responses.
at
org.apache.cassandra.db.CounterMutation.grabCounterLocks(CounterMutation.java:146)
~[cassandra-all-2.1.8.689.jar:2.1.8.689]
at org.apache.cassandra.db.CounterMutation.apply(CounterMutation.java:122)
~[cassandra-all-2.1.8.689.jar:2.1.8.689]
at
org.apache.cassandra.service.StorageProxy$8.runMayThrow(StorageProxy.java:1152)
~[cassandra-all-2.1.8.689.jar:2.1.8.689]
at
org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2188)
~[cassandra-all-2.1.8.689.jar:2.1.8.689]
{noformat}
We should probably supress the exception and log a dropped counter mutation.
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