Juho Mäkinen created CASSANDRA-8182:
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Summary: Comparison method violates its general contract in
IndexSummaryManager.redistributeSummaries
Key: CASSANDRA-8182
URL: https://issues.apache.org/jira/browse/CASSANDRA-8182
Project: Cassandra
Issue Type: Bug
Environment: 2.1.0
Reporter: Juho Mäkinen
I found this exception while going over the logs of my new 2.1.0 production
candidate cluster:
ERROR [IndexSummaryManager:1] 2014-10-23 14:37:56,727 CassandraDaemon.java:166
- Exception in thread Thread[IndexSummaryManager:1,1,main]
java.lang.IllegalArgumentException: Comparison method violates its general
contract!
at java.util.TimSort.mergeLo(TimSort.java:747) ~[na:1.7.0_67]
at java.util.TimSort.mergeAt(TimSort.java:483) ~[na:1.7.0_67]
at java.util.TimSort.mergeCollapse(TimSort.java:408) ~[na:1.7.0_67]
at java.util.TimSort.sort(TimSort.java:214) ~[na:1.7.0_67]
at java.util.TimSort.sort(TimSort.java:173) ~[na:1.7.0_67]
at java.util.Arrays.sort(Arrays.java:659) ~[na:1.7.0_67]
at java.util.Collections.sort(Collections.java:217) ~[na:1.7.0_67]
at
org.apache.cassandra.io.sstable.IndexSummaryManager.redistributeSummaries(IndexSummaryManager.java:277)
~[apache-cassandra-2.1.0.jar:2.1.0]
at
org.apache.cassandra.io.sstable.IndexSummaryManager.redistributeSummaries(IndexSummaryManager.java:238)
~[apache-cassandra-2.1.0.jar:2.1.0]
at
org.apache.cassandra.io.sstable.IndexSummaryManager$1.runMayThrow(IndexSummaryManager.java:139)
~[apache-cassandra-2.1.0.jar:2.1.0]
at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
~[apache-cassandra-2.1.0.jar:2.1.0]
at
org.apache.cassandra.concurrent.DebuggableScheduledThreadPoolExecutor$UncomplainingRunnable.run(DebuggableScheduledThreadPoolExecutor.java:75)
~[apache-cassandra-2.1.0.jar:2.1.0]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
[na:1.7.0_67]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
[na:1.7.0_67]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
[na:1.7.0_67]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
[na:1.7.0_67]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
[na:1.7.0_67]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[na:1.7.0_67]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]
There's some other cases of invalid comparison methods in the past, but not
from this case.
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