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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
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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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