KahaDB store file lock issue - NPE if store is locked and 
failIfDatabaseIsLocked is set. Only one try otherwise
---------------------------------------------------------------------------------------------------------------

                 Key: AMQ-2285
                 URL: https://issues.apache.org/activemq/browse/AMQ-2285
             Project: ActiveMQ
          Issue Type: Bug
          Components: Message Store
    Affects Versions: 5.3.0
            Reporter: Gary Tully
            Assignee: Gary Tully
             Fix For: 5.3.0


{code}
2009-06-10 09:37:12,462 [com.fusesource.support.StoreBrokerRunner.main()] INFO  
BrokerService - Using Persistence Adapter: 
org.apache.activemq.store.kahadb.kahadbst...@bb6598
2009-06-10 09:37:12,470 [com.fusesource.support.StoreBrokerRunner.main()] ERROR 
BrokerService - Failed to start ActiveMQ JMS Message Broker. Reason: 
java.io.IOException: File 'storeBroker1/kahadbstore/lock' could not be locked.
java.io.IOException: File 'storeBroker1/kahadbstore/lock' could not be locked.
        at org.apache.kahadb.util.LockFile.lock(LockFile.java:67)
        at 
org.apache.activemq.store.kahadb.MessageDatabase.open(MessageDatabase.java:225)
        at 
org.apache.activemq.store.kahadb.MessageDatabase.load(MessageDatabase.java:279)
        at 
org.apache.activemq.store.kahadb.MessageDatabase.start(MessageDatabase.java:164)
        at 
org.apache.activemq.broker.BrokerService.start(BrokerService.java:463)
        at 
com.fusesource.support.StoreBrokerRunner.main(StoreBrokerRunner.java:56)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283)
        at java.lang.Thread.run(Thread.java:613)
2009-06-10 09:37:12,474 [com.fusesource.support.StoreBrokerRunner.main()] INFO  
BrokerService - ActiveMQ Message Broker (slaveBroker1, null) is shutting down
2009-06-10 09:37:12,474 [com.fusesource.support.StoreBrokerRunner.main()] INFO  
TransportConnector - Connector nio://127.0.0.1:61627?useQueueForAccept=false 
Stopped
2009-06-10 09:37:12,484 [com.fusesource.support.StoreBrokerRunner.main()] ERROR 
KahaDBStore - Could not stop service: 
org.apache.activemq.store.kahadb.kahadbst...@bb6598. Reason: 
java.lang.NullPointerException
java.lang.NullPointerException
        at 
org.apache.activemq.store.kahadb.MessageDatabase.unload(MessageDatabase.java:315)
        at 
org.apache.activemq.store.kahadb.MessageDatabase.stop(MessageDatabase.java:170)
        at org.apache.activemq.util.ServiceStopper.stop(ServiceStopper.java:41)
        at org.apache.activemq.broker.BrokerService.stop(BrokerService.java:541)
        at 
org.apache.activemq.broker.BrokerService.start(BrokerService.java:509)
        at 
com.fusesource.support.StoreBrokerRunner.main(StoreBrokerRunner.java:56)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283)
        at java.lang.Thread.run(Thread.java:613)
2009-06-10 09:37:12,486 [com.fusesource.support.StoreBrokerRunner.main()] DEBUG 
ManagementContext - Probably not using JRE 1.4: mx4j.tools.naming.NamingService
2009-06-10 09:37:12,492 [com.fusesource.support.StoreBrokerRunner.main()] INFO  
BrokerService - ActiveMQ JMS Message Broker (slaveBroker1, null) stopped
2009-06-10 09:37:12,492 [com.fusesource.support.StoreBrokerRunner.main()] WARN  
BrokerService - Failed to stop broker after failure in start 
java.lang.NullPointerException
        at 
org.apache.activemq.store.kahadb.MessageDatabase.unload(MessageDatabase.java:315)
        at 
org.apache.activemq.store.kahadb.MessageDatabase.stop(MessageDatabase.java:170)
        at org.apache.activemq.util.ServiceStopper.stop(ServiceStopper.java:41)
        at org.apache.activemq.broker.BrokerService.stop(BrokerService.java:541)
        at 
org.apache.activemq.broker.BrokerService.start(BrokerService.java:509)
        at 
com.fusesource.support.StoreBrokerRunner.main(StoreBrokerRunner.java:56)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283)
        at java.lang.Thread.run(Thread.java:613)
2009-06-10 09:37:12,493 [com.fusesource.support.StoreBrokerRunner.main()] ERROR 
StoreBrokerRunner - java.io.IOException: File 'storeBroker1/kahadbstore/lock' 
could not be locked.
{code}

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