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https://issues.apache.org/jira/browse/CASSANDRA-5334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13600264#comment-13600264
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Brandon Williams commented on CASSANDRA-5334:
---------------------------------------------
Do you know which step is causing the exception?
> NullPointerException in a mixed 1.1 / 1.2 cluster
> -------------------------------------------------
>
> Key: CASSANDRA-5334
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5334
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 1.1.9
> Reporter: Ryan McGuire
>
> I have a mixed version cluster consisting of two 1.1.9 nodes and one 1.2.2
> node upgraded from 1.1.9.
> The upgrade works, and I don't see any end user problems, however I see this
> exception in the logs on the non-upgraded nodes:
> {code}
> ERROR [MigrationStage:1] 2013-03-11 18:09:09,001 AbstractCassandraDaemon.java
> (line 135) Exception in thread Thread[MigrationStage:1,5,main]
> java.lang.NullPointerException
> at
> org.apache.cassandra.utils.ByteBufferUtil.string(ByteBufferUtil.java:167)
> at
> org.apache.cassandra.utils.ByteBufferUtil.string(ByteBufferUtil.java:124)
> at org.apache.cassandra.cql.jdbc.JdbcUTF8.getString(JdbcUTF8.java:77)
> at org.apache.cassandra.cql.jdbc.JdbcUTF8.compose(JdbcUTF8.java:97)
> at org.apache.cassandra.db.marshal.UTF8Type.compose(UTF8Type.java:35)
> at
> org.apache.cassandra.cql3.UntypedResultSet$Row.getString(UntypedResultSet.java:87)
> at
> org.apache.cassandra.config.KSMetaData.fromSchema(KSMetaData.java:256)
> at org.apache.cassandra.db.DefsTable.mergeKeyspaces(DefsTable.java:397)
> at org.apache.cassandra.db.DefsTable.mergeSchema(DefsTable.java:373)
> at
> org.apache.cassandra.db.DefsTable.mergeRemoteSchema(DefsTable.java:352)
> at
> org.apache.cassandra.db.DefinitionsUpdateVerbHandler$1.runMayThrow(DefinitionsUpdateVerbHandler.java:48)
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
> 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)
> {code}
> Steps to reproduce:
> {code}
> ccm create -v 1.1.9 1.1.9
> ccm populate -n 3
> ccm start
> ccm node1 stress
> ccm node1 down
> {code}
> edit ~/.ccm/1.1.9/cluster.conf and configure cassandra_dir to point to 1.2.2
> {code}
> ccm node1 up
> {code}
> The cluster is now a mixed version, and works for user queries, but with the
> exception above.
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