Failed to checkpoint a messaeg store

We just changed over to a single external broker over TCP because of
problems we were having with broker networking.  We put some light load
on it and this popped up in the broker output about an hour later:

ERROR JournalPersistenceAdapter      - Failed to checkpoint a message
store:
edu.emory.mathcs.backport.java.util.concurrent.ExecutionException:
java.io.IOException: Not started.
edu.emory.mathcs.backport.java.util.concurrent.ExecutionException:
java.io.IOException: Not started.
        at
edu.emory.mathcs.backport.java.util.concurrent.FutureTask.getResult(FutureTask.java:299)
        at
edu.emory.mathcs.backport.java.util.concurrent.FutureTask.get(FutureTask.java:118)
        at
org.apache.activemq.store.journal.JournalPersistenceAdapter.doCheckpoint(JournalPersistenceAdapter.java:377)
        at
org.apache.activemq.store.journal.JournalPersistenceAdapter$2.iterate(JournalPersistenceAdapter.java:121)
        at
org.apache.activemq.thread.DedicatedTaskRunner.runTask(DedicatedTaskRunner.java:87)
        at
org.apache.activemq.thread.DedicatedTaskRunner.access$000(DedicatedTaskRunner.java:24)
        at
org.apache.activemq.thread.DedicatedTaskRunner$1.run(DedicatedTaskRunner.java:38)
Caused by: java.io.IOException: Not started.
        at
org.apache.activemq.store.jdbc.TransactionContext.rollback(TransactionContext.java:164)
        at
org.apache.activemq.store.jdbc.JDBCPersistenceAdapter.rollbackTransaction(JDBCPersistenceAdapter.java:308)
        at
org.apache.activemq.store.journal.JournalPersistenceAdapter.rollbackTransaction(JournalPersistenceAdapter.java:189)
        at
org.apache.activemq.util.TransactionTemplate.run(TransactionTemplate.java:61)
        at
org.apache.activemq.store.journal.JournalMessageStore.checkpoint(JournalMessageStore.java:246)
        at
org.apache.activemq.store.journal.JournalMessageStore.checkpoint(JournalMessageStore.java:220)
        at
org.apache.activemq.store.journal.JournalPersistenceAdapter$4.call(JournalPersistenceAdapter.java:347)
        at
edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:176)
        at
edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at
edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:595)

Is this something to worry about? :)

--
Christopher G. Stach II