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https://issues.apache.org/jira/browse/CASSANDRA-5811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13738287#comment-13738287
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Aleksey Yeschenko commented on CASSANDRA-5811:
----------------------------------------------

Interesting. For me it fails in a similar way, but on the 2.0 side:

{noformat}
java.lang.NullPointerException
>...at org.apache.cassandra.utils.ByteBufferUtil.string(ByteBufferUtil.java:167)
>...at 
>org.apache.cassandra.serializers.AbstractTextSerializer.deserialize(AbstractTextSerializer.java:39)
>...at 
>org.apache.cassandra.serializers.AbstractTextSerializer.deserialize(AbstractTextSerializer.java:26)
>...at 
>org.apache.cassandra.db.marshal.AbstractType.compose(AbstractType.java:142)
>...at 
>org.apache.cassandra.cql3.UntypedResultSet$Row.getString(UntypedResultSet.java:101)
>...at 
>org.apache.cassandra.config.CFMetaData.fromSchemaNoColumnsNoTriggers(CFMetaData.java:1599)
>...at org.apache.cassandra.config.CFMetaData.fromSchema(CFMetaData.java:1642)
>...at 
>org.apache.cassandra.config.KSMetaData.deserializeColumnFamilies(KSMetaData.java:305)
>...at org.apache.cassandra.config.KSMetaData.fromSchema(KSMetaData.java:286)
>...at org.apache.cassandra.db.DefsTables.loadFromKeyspace(DefsTables.java:139)
>...at 
>org.apache.cassandra.config.DatabaseDescriptor.loadSchemas(DatabaseDescriptor.java:497)
>...at 
>org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:236)
>...at 
>org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:443)
>...at 
>org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:486)
{noformat}
                
> NPE during upgrade
> ------------------
>
>                 Key: CASSANDRA-5811
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5811
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Brandon Williams
>            Assignee: Aleksey Yeschenko
>             Fix For: 1.2.9
>
>         Attachments: node2.log.bz2
>
>
> The upgrade_through_versions dtest occasionally fails with the following 
> error (on the 1.1 side):
> {noformat}
> ERROR [InternalResponseStage:2] 2013-07-26 12:51:10,145 
> AbstractCassandraDaemon.java (line 135) Exception in thread 
> Thread[InternalResponseStage:2,5,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$Row.getString(UntypedResultSet.java:87)
>     at org.apache.cassandra.config.KSMetaData.fromSchema(KSMetaData.java:256)
>     at org.apache.cassandra.db.DefsTable.mergeKeyspaces(DefsTable.java:397)
>     at org.apache.cassandra.db.DefsTable.mergeSchema(DefsTable.java:373)
>     at org.apache.cassandra.db.DefsTable.mergeRemoteSchema(DefsTable.java:352)
>     at 
> org.apache.cassandra.service.MigrationManager$MigrationTask$1.response(MigrationManager.java:453)
>     at 
> org.apache.cassandra.net.ResponseVerbHandler.doVerb(ResponseVerbHandler.java:45)
>     at 
> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:59)
>     at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>     at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>     at java.lang.Thread.run(Thread.java:722)
> {noformat}

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