Russ Hatch created CASSANDRA-7728:
-------------------------------------
Summary: ConcurrentModificationException after upgrade to trunk
Key: CASSANDRA-7728
URL: https://issues.apache.org/jira/browse/CASSANDRA-7728
Project: Cassandra
Issue Type: Bug
Reporter: Russ Hatch
Trying to repro another issue, I ran across this exception. It occurred during
a rolling upgrade to trunk. It happening during or right after the test script
checks counters to see if they are correct.
{noformat}
java.util.ConcurrentModificationException: null
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
~[na:1.7.0_67]
at java.util.ArrayList$Itr.next(ArrayList.java:831) ~[na:1.7.0_67]
at
org.apache.cassandra.service.RowDigestResolver.getData(RowDigestResolver.java:40)
~[main/:na]
at
org.apache.cassandra.service.RowDigestResolver.getData(RowDigestResolver.java:28)
~[main/:na]
at org.apache.cassandra.service.ReadCallback.get(ReadCallback.java:110)
~[main/:na]
at
org.apache.cassandra.service.AbstractReadExecutor.get(AbstractReadExecutor.java:144)
~[main/:na]
at
org.apache.cassandra.service.StorageProxy.fetchRows(StorageProxy.java:1262)
~[main/:na]
at
org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:1188)
~[main/:na]
at
org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:256)
~[main/:na]
at
org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:212)
~[main/:na]
at
org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:61)
~[main/:na]
at
org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:186)
~[main/:na]
at
org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:205)
~[main/:na]
at
org.apache.cassandra.thrift.CassandraServer.execute_cql3_query(CassandraServer.java:1916)
~[main/:na]
at
org.apache.cassandra.thrift.Cassandra$Processor$execute_cql3_query.getResult(Cassandra.java:4588)
~[thrift/:na]
at
org.apache.cassandra.thrift.Cassandra$Processor$execute_cql3_query.getResult(Cassandra.java:4572)
~[thrift/:na]
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
~[libthrift-0.9.1.jar:0.9.1]
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
~[libthrift-0.9.1.jar:0.9.1]
at
org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:201)
~[main/:na]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
[na:1.7.0_67]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[na:1.7.0_67]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]
{noformat}
It's not happening 100% of the time, but may be triggered by running this dtest:
{noformat}
nosetests -vs
upgrade_through_versions_test.py:TestUpgradeThroughVersions.upgrade_test_mixed
{noformat}
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