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Date: Fri, 12 Oct 2012 15:03:03 +0000 (UTC)
From: "Brandon Williams (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <102979204.37602.1350054183473.JavaMail.jiratomcat@arcas>
In-Reply-To: <1773030523.17890.1349834402981.JavaMail.jiratomcat@arcas>
Subject: [jira] [Commented] (CASSANDRA-4786) NPE in migration stage after
 creating an index
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    [ https://issues.apache.org/jira/browse/CASSANDRA-4786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13475049#comment-13475049 ] 

Brandon Williams commented on CASSANDRA-4786:
---------------------------------------------

If what we're seeing here is racy memtable switch behavior, then this is only being seen by schema changes since they flush two tables so close together, so we have a greater overall problem.  [~slebresne], can you take a look?
                
> NPE in migration stage after creating an index
> ----------------------------------------------
>
>                 Key: CASSANDRA-4786
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4786
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Brandon Williams
>            Assignee: Pavel Yaskevich
>             Fix For: 1.2.0 beta 2
>
>
> The dtests are generating this error after trying to create an index in cql2:
> {noformat}
> ERROR [MigrationStage:1] 2012-10-09 20:54:12,796 CassandraDaemon.java (line 132) Exception in thread Thread[MigrationStage:1,5,main]
> java.lang.NullPointerException
>     at org.apache.cassandra.db.ColumnFamilyStore.reload(ColumnFamilyStore.java:162)
>     at org.apache.cassandra.db.DefsTable.updateColumnFamily(DefsTable.java:549)
>     at org.apache.cassandra.db.DefsTable.mergeColumnFamilies(DefsTable.java:479)
>     at org.apache.cassandra.db.DefsTable.mergeSchema(DefsTable.java:344)
>     at org.apache.cassandra.service.MigrationManager$1.call(MigrationManager.java:256)
>     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
>     at java.util.concurrent.FutureTask.run(FutureTask.java:138)
>     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)
> ERROR [Thrift:1] 2012-10-09 20:54:12,797 CustomTThreadPoolServer.java (line 214) Error occurred during processing of message.
> java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.NullPointerException
>     at org.apache.cassandra.utils.FBUtilities.waitOnFuture(FBUtilities.java:348)
>     at org.apache.cassandra.service.MigrationManager.announce(MigrationManager.java:238)
>     at org.apache.cassandra.service.MigrationManager.announceColumnFamilyUpdate(MigrationManager.java:209)
>     at org.apache.cassandra.cql.QueryProcessor.processStatement(QueryProcessor.java:714)
>     at org.apache.cassandra.cql.QueryProcessor.process(QueryProcessor.java:816)
>     at org.apache.cassandra.thrift.CassandraServer.execute_cql_query(CassandraServer.java:1656)
>     at org.apache.cassandra.thrift.Cassandra$Processor$execute_cql_query.getResult(Cassandra.java:3721)
>     at org.apache.cassandra.thrift.Cassandra$Processor$execute_cql_query.getResult(Cassandra.java:3709)
>     at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:32)
>     at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:34)
>     at org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:196)
>     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>     at java.lang.Thread.run(Thread.java:662)
> Caused by: java.util.concurrent.ExecutionException: java.lang.NullPointerException
>     at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
>     at java.util.concurrent.FutureTask.get(FutureTask.java:83)
>     at org.apache.cassandra.utils.FBUtilities.waitOnFuture(FBUtilities.java:344)
>     ... 13 more
> Caused by: java.lang.NullPointerException
>     at org.apache.cassandra.db.ColumnFamilyStore.reload(ColumnFamilyStore.java:162)
>     at org.apache.cassandra.db.DefsTable.updateColumnFamily(DefsTable.java:549)
>     at org.apache.cassandra.db.DefsTable.mergeColumnFamilies(DefsTable.java:479)
>     at org.apache.cassandra.db.DefsTable.mergeSchema(DefsTable.java:344)
>     at org.apache.cassandra.service.MigrationManager$1.call(MigrationManager.java:256)
>     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
>     at java.util.concurrent.FutureTask.run(FutureTask.java:138)
>     ... 3 more
> {noformat}

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