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From Jørgen Løland (JIRA) <j...@apache.org>
Subject [jira] Closed: (DERBY-3508) Log receiver thread fails with NPE at failover when master has died
Date Tue, 18 Mar 2008 09:13:24 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jørgen Løland closed DERBY-3508.
--------------------------------


> Log receiver thread fails with NPE at failover when master has died
> -------------------------------------------------------------------
>
>                 Key: DERBY-3508
>                 URL: https://issues.apache.org/jira/browse/DERBY-3508
>             Project: Derby
>          Issue Type: Bug
>          Components: Replication
>    Affects Versions: 10.4.0.0
>            Reporter: Øystein Grøvlen
>            Assignee: Jørgen Løland
>            Priority: Minor
>             Fix For: 10.4.0.0, 10.5.0.0
>
>         Attachments: derby-3508-1a.diff, derby-3508-1a.stat
>
>
> Both master and slave embedded in ij.
> I kill master and perform failover on slave. 
> The following is printed in ij:
> ij> connect 'jdbc:derby:slaveDB;user=oystein;password=pass;failover=true';
> Exception in thread "derby.slave.logger-slaveDB" java.lang.NullPointerException
>     at org.apache.derby.impl.services.replication.slave.SlaveController.setupConnection(SlaveController.java:348)
>    at org.apache.derby.impl.services.replication.slave.SlaveController.handleDisconnect(SlaveController.java:375)
>   at org.apache.derby.impl.services.replication.slave.SlaveController.access$600(SlaveController.java:62)
>  at org.apache.derby.impl.services.replication.slave.SlaveController$SlaveLogReceiverThread.run(SlaveController.java:504)
> Note that failover works, and all seems well, so this is not a major issue.
> derby.log is as follows:
> --------  BEGIN REPLICATION ERROR MESSAGE ---------
> Lost connection with the replication master of database 'slaveDB'.
> java.io.EOFException
> 	at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2552)
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1297)
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
> 	at org.apache.derby.impl.services.replication.net.SocketConnection.readMessage(SocketConnection.java:84)
> 	at org.apache.derby.impl.services.replication.net.ReplicationMessageReceive.readMessage(ReplicationMessageReceive.java:387)
> 	at org.apache.derby.impl.services.replication.slave.SlaveController$SlaveLogReceiverThread.run(SlaveController.java:477)
> ---------  END REPLICATION ERROR MESSAGE ----------
> Failover perfomed successfully for database 'slaveDB'.
> Database Class Loader started - derby.database.classpath=''

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