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From Jørgen Løland (JIRA) <j...@apache.org>
Subject [jira] Commented: (DERBY-3359) The log shipper needs to be modified to vary the shipping intervals dynamically (based on load)
Date Mon, 11 Feb 2008 12:22:09 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12567603#action_12567603
] 

Jørgen Løland commented on DERBY-3359:
--------------------------------------

I tried running replication with the new log shipper. Seems mf is never initialized in ReplicationLogBuffer.

Master-side start replication (slave side behaves normally):

$ ij
ij version 10.4
ij> connect 'jdbc:derby:t1';
ij> connect 'jdbc:derby:t1;startMaster=true;slaveHost=localhost';
ij(CONNECTION1)> Exception in thread "Thread-1" java.lang.NullPointerException
        at org.apache.derby.impl.services.replication.buffer.ReplicationLogBuffer.switchDirtyBuffer(ReplicationLogBuffer.java:319)
        at org.apache.derby.impl.services.replication.buffer.ReplicationLogBuffer.next(ReplicationLogBuffer.java:187)
        at org.apache.derby.impl.services.replication.master.AsynchronousLogShipper.shipALogChunk(AsynchronousLogShipper.java:213)
        at org.apache.derby.impl.services.replication.master.AsynchronousLogShipper.run(AsynchronousLogShipper.java:165)


> The log shipper needs to be modified to vary the shipping intervals dynamically (based
on load)
> -----------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3359
>                 URL: https://issues.apache.org/jira/browse/DERBY-3359
>             Project: Derby
>          Issue Type: Sub-task
>            Reporter: V.Narayanan
>            Assignee: V.Narayanan
>         Attachments: DynamicLogShipping_v1.diff, DynamicLogShipping_v1.stat, DynamicLogShipping_v2.diff,
DynamicLogShipping_v2.stat, DynamicLogShipping_v3.diff, DynamicLogShipping_v3.stat
>
>


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