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From Gary Tully <gary.tu...@gmail.com>
Subject Re: Error at broker end in performance test
Date Thu, 11 Aug 2011 15:46:52 GMT
you are experiencing: https://issues.apache.org/jira/browse/AMQ-3434

that is resolved in the current 5.6-SNAPSHOT if you want to give that a whirl

On 11 August 2011 03:47, kaustubh khasnis <kaustubh.khasnis@gmail.com> wrote:
> Hi,
> I was running a performance test in which I tried to add a backlog of around
> 4-5 M messages over 10 virtual topic,pushed by around 100 producers and then
> tried to drain them by equal number of consumers , with 10 consumers forming
> a group of virtual topic consumer. in middle of draining I encountered with
> following exception in broker log. Can anyone please tell me what went
> wrong?? After the exception as well, the broker and consumers continued
> their normal operations.
>
> 2011-08-11 02:36:19,067 ERROR
> [org.apache.activemq.broker.region.cursors.AbstractStoreCursor]
> QueueStorePrefetch1976196437 - Failed to fill batch
> java.lang.NullPointerException
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.findNextPage(BTreeNode.java:110)
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.hasNext(BTreeNode.java:121)
>    at
> org.apache.activemq.store.kahadb.MessageDatabase$MessageOrderIndex$MessageOrderIterator.hasNext(MessageDatabase.java:2359)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$5.execute(KahaDBStore.java:491)
>    at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recoverNextMessages(KahaDBStore.java:485)
>    at
> org.apache.activemq.store.ProxyMessageStore.recoverNextMessages(ProxyMessageStore.java:88)
>    at
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:97)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:260)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:145)
>    at
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.hasNext(StoreQueueCursor.java:131)
>    at
> org.apache.activemq.broker.region.Queue.doPageInForDispatch(Queue.java:1713)
>    at
> org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1932)
>    at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1440)
>    at org.apache.activemq.broker.region.Queue.wakeup(Queue.java:1643)
>    at
> org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:394)
>    at
> org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:383)
>    at
> org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:549)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:197)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:87)
>    at
> org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:465)
>    at org.apache.activemq.command.MessageAck.visit(MessageAck.java:229)
>    at
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306)
>    at
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
>    at
> org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:116)
>    at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
>    at
> org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:218)
>    at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:127)
>    at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>    at java.lang.Thread.run(Thread.java:662)
> 2011-08-11 02:36:19,070 ERROR
> [org.apache.activemq.broker.region.cursors.AbstractStoreCursor]
> QueueStorePrefetch1976196437 - Failed to fill batch
> java.lang.RuntimeException: java.lang.NullPointerException
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:263)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:145)
>    at
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.hasNext(StoreQueueCursor.java:131)
>    at
> org.apache.activemq.broker.region.Queue.doPageInForDispatch(Queue.java:1713)
>    at
> org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1932)
>    at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1440)
>    at org.apache.activemq.broker.region.Queue.wakeup(Queue.java:1643)
>    at
> org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:394)
>    at
> org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:383)
>    at
> org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:549)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:197)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:87)
>    at
> org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:465)
>    at org.apache.activemq.command.MessageAck.visit(MessageAck.java:229)
>    at
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306)
>    at
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
>    at
> org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:116)
>    at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
>    at
> org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:218)
>    at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:127)
>    at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>    at java.lang.Thread.run(Thread.java:662)
> Caused by: java.lang.NullPointerException
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.findNextPage(BTreeNode.java:110)
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.hasNext(BTreeNode.java:121)
>    at
> org.apache.activemq.store.kahadb.MessageDatabase$MessageOrderIndex$MessageOrderIterator.hasNext(MessageDatabase.java:2359)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$5.execute(KahaDBStore.java:491)
>    at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recoverNextMessages(KahaDBStore.java:485)
>    at
> org.apache.activemq.store.ProxyMessageStore.recoverNextMessages(ProxyMessageStore.java:88)
>    at
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:97)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:260)
>    ... 25 more
> 2011-08-11 02:36:19,071 ERROR [org.apache.activemq.broker.region.Queue]
> Failed to page in more queue messages
> java.lang.RuntimeException: java.lang.RuntimeException:
> java.lang.NullPointerException
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:148)
>    at
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.hasNext(StoreQueueCursor.java:131)
>    at
> org.apache.activemq.broker.region.Queue.doPageInForDispatch(Queue.java:1713)
>    at
> org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1932)
>    at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1440)
>    at org.apache.activemq.broker.region.Queue.wakeup(Queue.java:1643)
>    at
> org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:394)
>    at
> org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:383)
>    at
> org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:549)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:197)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:87)
>    at
> org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:465)
>    at org.apache.activemq.command.MessageAck.visit(MessageAck.java:229)
>    at
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306)
>    at
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
>    at
> org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:116)
>    at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
>    at
> org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:218)
>    at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:127)
>    at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>    at java.lang.Thread.run(Thread.java:662)
> Caused by: java.lang.RuntimeException: java.lang.NullPointerException
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:263)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:145)
>    ... 24 more
> Caused by: java.lang.NullPointerException
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.findNextPage(BTreeNode.java:110)
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.hasNext(BTreeNode.java:121)
>    at
> org.apache.activemq.store.kahadb.MessageDatabase$MessageOrderIndex$MessageOrderIterator.hasNext(MessageDatabase.java:2359)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$5.execute(KahaDBStore.java:491)
>    at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recoverNextMessages(KahaDBStore.java:485)
>    at
> org.apache.activemq.store.ProxyMessageStore.recoverNextMessages(ProxyMessageStore.java:88)
>    at
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:97)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:260)
>    ... 25 more
> 2011-08-11 02:36:19,087 ERROR
> [org.apache.activemq.broker.region.cursors.AbstractStoreCursor]
> QueueStorePrefetch1976196437 - Failed to fill batch
> java.lang.NullPointerException
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.findNextPage(BTreeNode.java:110)
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.hasNext(BTreeNode.java:121)
>    at
> org.apache.activemq.store.kahadb.MessageDatabase$MessageOrderIndex$MessageOrderIterator.hasNext(MessageDatabase.java:2359)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$5.execute(KahaDBStore.java:491)
>    at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recoverNextMessages(KahaDBStore.java:485)
>    at
> org.apache.activemq.store.ProxyMessageStore.recoverNextMessages(ProxyMessageStore.java:88)
>    at
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:97)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:260)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:145)
>    at
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.hasNext(StoreQueueCursor.java:131)
>    at
> org.apache.activemq.broker.region.Queue.doPageInForDispatch(Queue.java:1713)
>    at
> org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1932)
>    at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1440)
>    at org.apache.activemq.broker.region.Queue.wakeup(Queue.java:1643)
>    at
> org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:394)
>    at
> org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:383)
>    at
> org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:549)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:197)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:87)
>    at
> org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:465)
>    at org.apache.activemq.command.MessageAck.visit(MessageAck.java:229)
>    at
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306)
>    at
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
>    at
> org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:116)
>    at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
>    at
> org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:218)
>    at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:127)
>    at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>    at java.lang.Thread.run(Thread.java:662)
> 2011-08-11 02:36:19,089 ERROR
> [org.apache.activemq.broker.region.cursors.AbstractStoreCursor]
> QueueStorePrefetch1976196437 - Failed to fill batch
> java.lang.RuntimeException: java.lang.NullPointerException
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:263)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:145)
>    at
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.hasNext(StoreQueueCursor.java:131)
>    at
> org.apache.activemq.broker.region.Queue.doPageInForDispatch(Queue.java:1713)
>    at
> org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1932)
>    at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1440)
>    at org.apache.activemq.broker.region.Queue.wakeup(Queue.java:1643)
>    at
> org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:394)
>    at
> org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:383)
>    at
> org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:549)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:197)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:87)
>    at
> org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:465)
>    at org.apache.activemq.command.MessageAck.visit(MessageAck.java:229)
>    at
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306)
>    at
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
>    at
> org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:116)
>    at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
>    at
> org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:218)
>    at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:127)
>    at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>    at java.lang.Thread.run(Thread.java:662)
> Caused by: java.lang.NullPointerException
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.findNextPage(BTreeNode.java:110)
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.hasNext(BTreeNode.java:121)
>    at
> org.apache.activemq.store.kahadb.MessageDatabase$MessageOrderIndex$MessageOrderIterator.hasNext(MessageDatabase.java:2359)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$5.execute(KahaDBStore.java:491)
>    at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recoverNextMessages(KahaDBStore.java:485)
>    at
> org.apache.activemq.store.ProxyMessageStore.recoverNextMessages(ProxyMessageStore.java:88)
>    at
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:97)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:260)
>    ... 25 more
> 2011-08-11 02:36:19,090 ERROR [org.apache.activemq.broker.region.Queue]
> Failed to page in more queue messages
> java.lang.RuntimeException: java.lang.RuntimeException:
> java.lang.NullPointerException
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:148)
>    at
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.hasNext(StoreQueueCursor.java:131)
>    at
> org.apache.activemq.broker.region.Queue.doPageInForDispatch(Queue.java:1713)
>    at
> org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1932)
>    at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1440)
>    at org.apache.activemq.broker.region.Queue.wakeup(Queue.java:1643)
>    at
> org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:394)
>    at
> org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:383)
>    at
> org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:549)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:197)
>    at
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:77)
>    at
> org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:87)
>    at
> org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:465)
>    at org.apache.activemq.command.MessageAck.visit(MessageAck.java:229)
>    at
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306)
>    at
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
>    at
> org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:116)
>    at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
>    at
> org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:218)
>    at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:127)
>    at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>    at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>    at java.lang.Thread.run(Thread.java:662)
> Caused by: java.lang.RuntimeException: java.lang.NullPointerException
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:263)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:145)
>    ... 24 more
> Caused by: java.lang.NullPointerException
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.findNextPage(BTreeNode.java:110)
>    at
> org.apache.kahadb.index.BTreeNode$BTreeIterator.hasNext(BTreeNode.java:121)
>    at
> org.apache.activemq.store.kahadb.MessageDatabase$MessageOrderIndex$MessageOrderIterator.hasNext(MessageDatabase.java:2359)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$5.execute(KahaDBStore.java:491)
>    at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
>    at
> org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recoverNextMessages(KahaDBStore.java:485)
>    at
> org.apache.activemq.store.ProxyMessageStore.recoverNextMessages(ProxyMessageStore.java:88)
>    at
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:97)
>    at
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:260)
>    ... 25 more
>
>
> --Kaustubh
>



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