[DERBY-3508] Log receiver thread fails with NPE at failover when master has died

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 10.4.1.3
• Fix Version/s: 10.4.1.3, 10.5.1.1
• Component/s: Replication
• Assignee: Jorgen Loland
• Reporter: Oystein Grovlen
• Created: 07/Mar/08 09:43
• Updated: 04/May/09 18:22
• Resolved: 13/Mar/08 20:40

Description

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=''