Normal Description
Thousands of the following errors are getting logged to system.log:
ERROR [ReadRepairStage:150152] 2012-11-15 12:31:02,815 AbstractCassandraDaemon.java (line 135) Exception in thread Thread[ReadRepairStage:150152,5,main]
java.lang.AssertionError: Wrong class type.
at org.apache.cassandra.db.CounterColumn.diff(CounterColumn.java:110)
at org.apache.cassandra.db.ColumnFamily.diff(ColumnFamily.java:248)
at org.apache.cassandra.db.ColumnFamily.diff(ColumnFamily.java:342)
at org.apache.cassandra.service.RowRepairResolver.scheduleRepairs(RowRepairResolver.java:117)
at org.apache.cassandra.service.RowRepairResolver.resolve(RowRepairResolver.java:94)
at org.apache.cassandra.service.AsyncRepairCallback$1.runMayThrow(AsyncRepairCallback.java:54)
at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
There are also many of the following errors intermingled with the above:
ERROR [ReadRepairStage:150158] 2012-11-15 12:30:34,148 CounterContext.java (line 381) invalid counter shard detected; (b29a5480-e911-11e1-0000-ce481d6d2aff, 3, 916) and (b29a5480-e911-11e1-0000-ce481d6d2aff, 3, -1590) differ only in count; will pick highest to self-heal; this indicates a bug or corruption generated a bad counter shard
I am not 100% sure whether they are related.