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From "Philip Thompson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-7873) java.util.ConcurrentModificationException seen after selecting from system_auth
Date Wed, 03 Sep 2014 20:29:51 GMT
Philip Thompson created CASSANDRA-7873:
------------------------------------------

             Summary: java.util.ConcurrentModificationException seen after selecting from
system_auth
                 Key: CASSANDRA-7873
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7873
             Project: Cassandra
          Issue Type: Bug
         Environment: OSX and Ubuntu 14.04
            Reporter: Philip Thompson
             Fix For: 3.0


The dtest auth_test.py:TestAuth.system_auth_ks_is_alterable_test is failing on trunk only
with the following stack trace:

{code}
Unexpected error in node1 node log:
ERROR [Thrift:1] 2014-09-03 15:48:08,389 CustomTThreadPoolServer.java:219 - Error occurred
during processing of message.
java.util.ConcurrentModificationException: null
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859) ~[na:1.7.0_65]
	at java.util.ArrayList$Itr.next(ArrayList.java:831) ~[na:1.7.0_65]
	at org.apache.cassandra.service.RowDigestResolver.resolve(RowDigestResolver.java:71) ~[main/:na]
	at org.apache.cassandra.service.RowDigestResolver.resolve(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:1228) ~[main/:na]
	at org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:1154) ~[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.auth.Auth.selectUser(Auth.java:257) ~[main/:na]
	at org.apache.cassandra.auth.Auth.isExistingUser(Auth.java:76) ~[main/:na]
	at org.apache.cassandra.service.ClientState.login(ClientState.java:178) ~[main/:na]
	at org.apache.cassandra.thrift.CassandraServer.login(CassandraServer.java:1486) ~[main/:na]
	at org.apache.cassandra.thrift.Cassandra$Processor$login.getResult(Cassandra.java:3579) ~[thrift/:na]
	at org.apache.cassandra.thrift.Cassandra$Processor$login.getResult(Cassandra.java:3563) ~[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$WorkerProcess.run(CustomTThreadPoolServer.java:201)
~[main/:na]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_65]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_65]
	at java.lang.Thread.run(Thread.java:745) [na:1.7.0_65]
{code}

That exception is thrown when the following query is sent:
{code}
"""SELECT strategy_options
                          FROM system.schema_keyspaces
                          WHERE keyspace_name = 'system_auth'"""
{code}
The test alters the RF of the system_auth keyspace, then shuts down and restarts the cluster.



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