Hangs during query

[akuseru]

I am in the process of understanding cassandra and have been encountering an issue that I think is related to gocql.

cass := gocql.NewCluster("127.0.0.1")
cass.Keyspace = "test"
session, err := cass.CreateSession()
defer session.Close()

//later.. looping through an inbound channel to grab data.
if err := sess.Query(insert, params...).Exec(); err != nil {
                panic(err.Error())
            }

Then suddenly in my cassandra logs i'll see:

ERROR [Native-Transport-Requests:229] 2014-04-26 22:53:08,015 ErrorMessage.java (line 222) Unexpected exception during request
java.lang.AssertionError: localhost/127.0.0.1
    at org.apache.cassandra.service.StorageProxy.submitHint(StorageProxy.java:871)
    at org.apache.cassandra.service.StorageProxy.mutate(StorageProxy.java:491)
    at org.apache.cassandra.service.StorageProxy.mutateWithTriggers(StorageProxy.java:535)
    at org.apache.cassandra.cql3.statements.ModificationStatement.executeWithoutCondition(ModificationStatement.java:542)
    at org.apache.cassandra.cql3.statements.ModificationStatement.execute(ModificationStatement.java:526)
    at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:158)
    at org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:309)
    at org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:132)
    at org.apache.cassandra.transport.Message$Dispatcher.messageReceived(Message.java:304)
    at org.jboss.netty.handler.execution.ChannelUpstreamEventRunnable.doRun(ChannelUpstreamEventRunnable.java:43)
    at org.jboss.netty.handler.execution.ChannelEventRunnable.run(ChannelEventRunnable.java:67)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

the Go program will continue running until it's interrupted or cassandra hit's a java GC then the i/o threads get closed on cassandras end.

[akuseru]

Oh cassandra version is 2.0.7

[akuseru]

Oh I found the related issue on the cassandra website. sorry!

https://issues.apache.org/jira/browse/CASSANDRA-6796

[0x6e6562]

Ironically, I was the one that raised that particular issue in the Cassandra bug tracker, but it doesn't look like it has been resolved yet. To workaround the issue, I did a nodetool scrub on the keyspace, and this made the problem go away for now.