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https://issues.apache.org/jira/browse/CASSANDRA-5211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brandon Williams updated CASSANDRA-5211:
----------------------------------------
Attachment: 5211.txt
Confirmed that a null tokens list won't cause this. Regardless of how we got
here, it's more correct to confirm the existence of the dc and rack than just
the dc, so patch to do so.
> Migrating Clusters with gossip tables that have old dead nodes causes NPE,
> inability to join cluster
> ----------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-5211
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5211
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.2.1
> Reporter: Rick Branson
> Assignee: Brandon Williams
> Attachments: 5211.txt
>
>
> I had done a removetoken on this cluster when it was 1.1.x, and it had a
> "ghost" entry for the removed node still in the stored ring data. When the
> nodes loaded the table up after conversion to 1.2 and attempting to migrate
> to VNodes, I got the following traceback:
> ERROR [WRITE-/10.0.0.0] 2013-01-31 18:35:44,788 CassandraDaemon.java (line
> 133) Exception in thread Thread[WRITE-/10.0.0.0,5,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:73)
> at org.apache.cassandra.cql.jdbc.JdbcUTF8.compose(JdbcUTF8.java:93)
> at org.apache.cassandra.db.marshal.UTF8Type.compose(UTF8Type.java:32)
> at
> org.apache.cassandra.cql3.UntypedResultSet$Row.getString(UntypedResultSet.java:96)
> at
> org.apache.cassandra.db.SystemTable.loadDcRackInfo(SystemTable.java:402)
> at
> org.apache.cassandra.locator.Ec2Snitch.getDatacenter(Ec2Snitch.java:117)
> at
> org.apache.cassandra.locator.DynamicEndpointSnitch.getDatacenter(DynamicEndpointSnitch.java:127)
> at
> org.apache.cassandra.net.OutboundTcpConnection.isLocalDC(OutboundTcpConnection.java:74)
> at
> org.apache.cassandra.net.OutboundTcpConnection.connect(OutboundTcpConnection.java:270)
> at
> org.apache.cassandra.net.OutboundTcpConnection.run(OutboundTcpConnection.java:142)
> This is because these ghost nodes had a NULL tokens list in the system/peers
> table. A workaround was to delete the offending row in the system/peers table
> and restart the node.
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