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Posted to derby-dev@db.apache.org by "V.Narayanan (JIRA)" <ji...@apache.org> on 2008/04/07 11:08:24 UTC
[jira] Resolved: (DERBY-3454) 'java.lang.NullPointerException' is
thrown when starting a master db before a slave one
[ https://issues.apache.org/jira/browse/DERBY-3454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
V.Narayanan resolved DERBY-3454.
--------------------------------
Resolution: Fixed
Fix Version/s: 10.4.0.0
All relevant patches have been submitted and committed.
Resolving issue!
> 'java.lang.NullPointerException' is thrown when starting a master db before a slave one
> ---------------------------------------------------------------------------------------
>
> Key: DERBY-3454
> URL: https://issues.apache.org/jira/browse/DERBY-3454
> Project: Derby
> Issue Type: Bug
> Components: Replication
> Affects Versions: 10.4.0.0
> Reporter: Serge Tsv
> Assignee: V.Narayanan
> Fix For: 10.4.0.0
>
> Attachments: Derby3454.diff, Derby3454.stat
>
>
> The 'java.lang.NullPointerException' exception is thrown when a database is started in a master mode and is trying to establish a connection to an slave database socket, which is not available.
> The exception is by the MasterController#startMaster(). First, it tries to setup connection with a slave database using a transmitter:
> MasterController#setupConnection
> -> transmitter = new ReplicationMessageTransmit();
> transmitter.initConnection()
> -> new InetSocketAddress() -> createSocket() -> connect()
> The connect() method throws a ConnectException, and so fails to create a socketConn instance. The exception is then wrapped several times an propagated back to the MasterController#startMaster() method. It's caught there and then a MasterController#teardownNetwork() method is called, which tries to send a STOP message using the aforementioned transmitter, which hasn't been able to init a connection.
> A transmitter simply tries to call socketConn.writeMessage(message), which throws NPE because socketConn is null.
> Thanks!
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