Hi, 

  After restart of ActiveMQ 5.4.1 i get these exceptions and hence forth
there will be always this exception. 

Only way to resolve this is by deleting data folder for KahaDB. Please
suggest what could be wrong here and if there is any fix available for same.


 2010-11-02 10:09:45,163 | ERROR | Failed to page in more queue messages  |
org.apache.activemq.broker.region.Queue |
QueueThread:queue://account-notification-queue
java.lang.RuntimeException: java.lang.RuntimeException:
java.lang.NullPointerException
        at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.reset(AbstractStoreCursor.java:102)
        at
org.apache.activemq.broker.region.cursors.StoreQueueCursor.reset(StoreQueueCursor.java:157)
        at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1363)
        at
org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1503)
        at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1178)
        at
org.apache.activemq.thread.DeterministicTaskRunner.runTask(DeterministicTaskRunner.java:84)
        at
org.apache.activemq.thread.DeterministicTaskRunner$1.run(DeterministicTaskRunner.java:41)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
        at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:230)
        at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.reset(AbstractStoreCursor.java:99)
        ... 9 more
Caused by: java.lang.NullPointerException
2010-11-02 10:09:45,229 | ERROR | Failed to fill batch |
org.apache.activemq.broker.region.cursors.AbstractStoreCursor |
QueueThread:queue://account-notification-queue
java.lang.NullPointerException
2010-11-02 10:09:45,229 | ERROR | Failed to fill batch |
org.apache.activemq.broker.region.cursors.AbstractStoreCursor |
QueueThread:queue://account-notification-queue
java.lang.RuntimeException: java.lang.NullPointerException
        at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:230)
        at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.reset(AbstractStoreCursor.java:99)
        at
org.apache.activemq.broker.region.cursors.StoreQueueCursor.reset(StoreQueueCursor.java:157)
        at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1363)
        at
org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1503)
        at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1178)
        at
org.apache.activemq.thread.DeterministicTaskRunner.runTask(DeterministicTaskRunner.java:84)
        at
org.apache.activemq.thread.DeterministicTaskRunner$1.run(DeterministicTaskRunner.java:41)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
2010-11-02 10:09:45,229 | ERROR | Failed to page in more queue messages  |
org.apache.activemq.broker.region.Queue |
QueueThread:queue://account-notification-queue
java.lang.RuntimeException: java.lang.RuntimeException:
java.lang.NullPointerException
        at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.reset(AbstractStoreCursor.java:102)
        at
org.apache.activemq.broker.region.cursors.StoreQueueCursor.reset(StoreQueueCursor.java:157)
        at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1363)
        at
org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1503)
        at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1178)
        at
org.apache.activemq.thread.DeterministicTaskRunner.runTask(DeterministicTaskRunner.java:84)
        at
org.apache.activemq.thread.DeterministicTaskRunner$1.run(DeterministicTaskRunner.java:41)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
        at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:230)
        at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.reset(AbstractStoreCursor.java:99)
        ... 9 more
Caused by: java.lang.NullPointerException

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