[jira] [Assigned] (CASSANDRA-8090) NullPointerException when using prepared statements

["Benjamin Lerer (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-8090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benjamin Lerer reassigned CASSANDRA-8090:
-----------------------------------------

    Assignee: Benjamin Lerer

> NullPointerException when using prepared statements
> ---------------------------------------------------
>
>                 Key: CASSANDRA-8090
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8090
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Carl Yeksigian
>            Assignee: Benjamin Lerer
>
> Due to the changes in CASSANDRA-4914, using a prepared statement from multiple threads leads to a race condition where the simple selection may be reset from a different thread, causing the following NPE:
> {noformat}
> java.lang.NullPointerException: null
> 	at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63) ~[main/:na]
> 	at org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.build(Selection.java:372) ~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:1120) ~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:283) ~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:260) ~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:213) ~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:63) ~[main/:na]
> 	at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:226) ~[main/:na]
> 	at org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:481) ~[main/:na]
> 	at org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:133) ~[main/:na]
> 	at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:438) [main/:na]
> 	at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:334) [main/:na]
> 	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [netty-all-4.0.23.Final.jar:4.0.23.Final]
> 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [netty-all-4.0.23.Final.jar:4.0.23.Final]
> 	at io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32) [netty-all-4.0.23.Final.jar:4.0.23.Final]
> 	at io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324) [netty-all-4.0.23.Final.jar:4.0.23.Final]
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_67]
> 	at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:163) [main/:na]
> 	at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:103) [main/:na]
> 	at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]
> {noformat}
> Reproduced this using the stress tool:
> {noformat}
>  ./tools/bin/cassandra-stress user profile=tools/cqlstress-example.yaml ops\(insert=1,simple1=1\)
> {noformat}
> You'll need to change the {noformat}select:{noformat} line to be /1000 to prevent the illegal query exceptions.



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