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https://issues.apache.org/jira/browse/CASSANDRA-4786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13474700#comment-13474700
]
Pavel Yaskevich commented on CASSANDRA-4786:
--------------------------------------------
It looks like it's not a good idea to try to switch memtables as part of the CF
reload process as NPE happens in CFS.reload():162 which is related to ability
to change CF comparators feature (introduced in CQL3?), we can probably
minimize the effect by actually somehow checking if comparator was changed
before requesting memtable switch...
> 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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