[Dev] Error in MB 3.0.0 Alpha

2015-07-09 Thread Lahiru Sandaruwan 
Hi,

I was running a load test and found the error [1]. Is this a known error?

Thanks.

[1]

[2015-07-10 10:55:10,727]  INFO
{org.wso2.andes.subscription.SubscriptionStore} -  New local subscription
ADDED [QU001]ID=4@NODELahirus-MacBook-Pro-2.local/
10.100.1.152/T=1436505910725/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=true
[2015-07-10 10:55:23,131]  INFO
{org.wso2.andes.subscription.SubscriptionStore} -  Local Subscription
Removed [QU001]ID=4@NODELahirus-MacBook-Pro-2.local/
10.100.1.152/T=1436505921201/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=false
[2015-07-10 10:56:10,123]  INFO
{org.wso2.andes.subscription.SubscriptionStore} -  New local subscription
ADDED [QU001]ID=5@NODELahirus-MacBook-Pro-2.local/
10.100.1.152/T=1436505970121/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=true
[2015-07-10 10:56:10,266] ERROR
{org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
330294 ] Exception occurred while processing inbound events.Event type:
ACKNOWLEDGEMENT_EVENT
java.lang.NullPointerException
at
org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
at
org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
at
org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
at
org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
at
org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
at
org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
at
org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
[2015-07-10 10:56:10,997] ERROR
{org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
333063 ] Exception occurred while processing inbound events.Event type:
STATE_CHANGE_EVENT
java.lang.NullPointerException
at
org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
at
org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
at
org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
at
org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
at
org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
at
org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
at
org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
[2015-07-10 10:56:11,000] ERROR
{org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
333163 ] Exception occurred while processing inbound events.Event type:
ACKNOWLEDGEMENT_EVENT
java.lang.NullPointerException
at
org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
at
org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
at
org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
at
org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
at
org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
at
org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
at
org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
[2015-07-10 10:56:11,002] ERROR
{org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
334710 ] Exception occurred while processing inbound events.Event type:
STATE_CHANGE_EVENT
java.lang.NullPointerException
at
org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
at
org.wso2.andes.kernel.OnflightMessageTracker$MsgData.ac

Re: [Dev] Error in MB 3.0.0 Alpha

2015-07-09 Thread Hemika Kodikara 
Hi Lahiru,

Can you attach the client implementation ?

Regards,
Hemika

Hemika Kodikara
Software Engineer
WSO2 Inc.
lean . enterprise . middleware
http://wso2.com

Mobile : +9477762

On Fri, Jul 10, 2015 at 10:59 AM, Lahiru Sandaruwan 
wrote:

> Hi,
>
> I was running a load test and found the error [1]. Is this a known error?
>
> Thanks.
>
> [1]
>
> [2015-07-10 10:55:10,727]  INFO
> {org.wso2.andes.subscription.SubscriptionStore} -  New local subscription
> ADDED [QU001]ID=4@NODELahirus-MacBook-Pro-2.local/
> 10.100.1.152/T=1436505910725/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=true
> [2015-07-10 10:55:23,131]  INFO
> {org.wso2.andes.subscription.SubscriptionStore} -  Local Subscription
> Removed [QU001]ID=4@NODELahirus-MacBook-Pro-2.local/
> 10.100.1.152/T=1436505921201/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=false
> [2015-07-10 10:56:10,123]  INFO
> {org.wso2.andes.subscription.SubscriptionStore} -  New local subscription
> ADDED [QU001]ID=5@NODELahirus-MacBook-Pro-2.local/
> 10.100.1.152/T=1436505970121/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=true
> [2015-07-10 10:56:10,266] ERROR
> {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
> 330294 ] Exception occurred while processing inbound events.Event type:
> ACKNOWLEDGEMENT_EVENT
> java.lang.NullPointerException
> at
> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
> at
> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
> at
> org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
> at
> org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
> at
> org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
> at
> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
> at
> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
> at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> [2015-07-10 10:56:10,997] ERROR
> {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
> 333063 ] Exception occurred while processing inbound events.Event type:
> STATE_CHANGE_EVENT
> java.lang.NullPointerException
> at
> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
> at
> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
> at
> org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
> at
> org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
> at
> org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
> at
> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
> at
> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
> at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> [2015-07-10 10:56:11,000] ERROR
> {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
> 333163 ] Exception occurred while processing inbound events.Event type:
> ACKNOWLEDGEMENT_EVENT
> java.lang.NullPointerException
> at
> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
> at
> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
> at
> org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
> at
> org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
> at
> org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
> at
> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
> at
> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
> at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>

Re: [Dev] Error in MB 3.0.0 Alpha

2015-07-10 Thread Pumudu Ruhunage 
Hi Lahiru,

Can you please provide the load test scenario you used to reproduce it?

Thanks,

On Fri, Jul 10, 2015 at 11:50 AM, Lahiru Sandaruwan 
wrote:

> Hi Hemika,
>
> Attached the Java client.
>
> Thanks.
>
> On Fri, Jul 10, 2015 at 11:20 AM, Hemika Kodikara  wrote:
>
>> Hi Lahiru,
>>
>> Can you attach the client implementation ?
>>
>> Regards,
>> Hemika
>>
>> Hemika Kodikara
>> Software Engineer
>> WSO2 Inc.
>> lean . enterprise . middleware
>> http://wso2.com
>>
>> Mobile : +9477762
>>
>> On Fri, Jul 10, 2015 at 10:59 AM, Lahiru Sandaruwan 
>> wrote:
>>
>>> Hi,
>>>
>>> I was running a load test and found the error [1]. Is this a known error?
>>>
>>> Thanks.
>>>
>>> [1]
>>>
>>> [2015-07-10 10:55:10,727]  INFO
>>> {org.wso2.andes.subscription.SubscriptionStore} -  New local subscription
>>> ADDED [QU001]ID=4@NODELahirus-MacBook-Pro-2.local/
>>> 10.100.1.152/T=1436505910725/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=true
>>> [2015-07-10 10:55:23,131]  INFO
>>> {org.wso2.andes.subscription.SubscriptionStore} -  Local Subscription
>>> Removed [QU001]ID=4@NODELahirus-MacBook-Pro-2.local/
>>> 10.100.1.152/T=1436505921201/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=false
>>> [2015-07-10 10:56:10,123]  INFO
>>> {org.wso2.andes.subscription.SubscriptionStore} -  New local subscription
>>> ADDED [QU001]ID=5@NODELahirus-MacBook-Pro-2.local/
>>> 10.100.1.152/T=1436505970121/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=true
>>> [2015-07-10 10:56:10,266] ERROR
>>> {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
>>> 330294 ] Exception occurred while processing inbound events.Event type:
>>> ACKNOWLEDGEMENT_EVENT
>>> java.lang.NullPointerException
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
>>> at
>>> org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
>>> at
>>> org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
>>> at
>>> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
>>> at
>>> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
>>> at
>>> com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>>> at java.lang.Thread.run(Thread.java:745)
>>> [2015-07-10 10:56:10,997] ERROR
>>> {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
>>> 333063 ] Exception occurred while processing inbound events.Event type:
>>> STATE_CHANGE_EVENT
>>> java.lang.NullPointerException
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
>>> at
>>> org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
>>> at
>>> org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
>>> at
>>> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
>>> at
>>> org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
>>> at
>>> com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>>> at java.lang.Thread.run(Thread.java:745)
>>> [2015-07-10 10:56:11,000] ERROR
>>> {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
>>> 333163 ] Exception occurred while processing inbound events.Event type:
>>> ACKNOWLEDGEMENT_EVENT
>>> java.lang.NullPointerException
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
>>> at
>>> org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
>>> at
>>> org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
>>> at
>>> org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(A

Re: [Dev] Error in MB 3.0.0 Alpha

2015-07-10 Thread Lahiru Sandaruwan 
Hi Pumudu,

Just run Sender and Receiver in the attached client.

Thanks.

On Fri, Jul 10, 2015 at 12:29 PM, Pumudu Ruhunage  wrote:

> Hi Lahiru,
>
> Can you please provide the load test scenario you used to reproduce it?
>
> Thanks,
>
> On Fri, Jul 10, 2015 at 11:50 AM, Lahiru Sandaruwan 
> wrote:
>
>> Hi Hemika,
>>
>> Attached the Java client.
>>
>> Thanks.
>>
>> On Fri, Jul 10, 2015 at 11:20 AM, Hemika Kodikara 
>> wrote:
>>
>>> Hi Lahiru,
>>>
>>> Can you attach the client implementation ?
>>>
>>> Regards,
>>> Hemika
>>>
>>> Hemika Kodikara
>>> Software Engineer
>>> WSO2 Inc.
>>> lean . enterprise . middleware
>>> http://wso2.com
>>>
>>> Mobile : +9477762
>>>
>>> On Fri, Jul 10, 2015 at 10:59 AM, Lahiru Sandaruwan 
>>> wrote:
>>>
 Hi,

 I was running a load test and found the error [1]. Is this a known
 error?

 Thanks.

 [1]

 [2015-07-10 10:55:10,727]  INFO
 {org.wso2.andes.subscription.SubscriptionStore} -  New local subscription
 ADDED [QU001]ID=4@NODELahirus-MacBook-Pro-2.local/
 10.100.1.152/T=1436505910725/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=true
 [2015-07-10 10:55:23,131]  INFO
 {org.wso2.andes.subscription.SubscriptionStore} -  Local Subscription
 Removed [QU001]ID=4@NODELahirus-MacBook-Pro-2.local/
 10.100.1.152/T=1436505921201/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=false
 [2015-07-10 10:56:10,123]  INFO
 {org.wso2.andes.subscription.SubscriptionStore} -  New local subscription
 ADDED [QU001]ID=5@NODELahirus-MacBook-Pro-2.local/
 10.100.1.152/T=1436505970121/D=true/X=false/O=null/E=amq.direct/ET=org.wso2.andes.server.exchange.DirectExchange$1@55a991d1/EUD=0/S=true
 [2015-07-10 10:56:10,266] ERROR
 {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
 330294 ] Exception occurred while processing inbound events.Event type:
 ACKNOWLEDGEMENT_EVENT
 java.lang.NullPointerException
 at
 org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
 at
 org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
 at
 org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
 at
 org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
 at
 org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
 at
 org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
 at
 org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
 at
 com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
 at
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
 at
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
 at java.lang.Thread.run(Thread.java:745)
 [2015-07-10 10:56:10,997] ERROR
 {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
 333063 ] Exception occurred while processing inbound events.Event type:
 STATE_CHANGE_EVENT
 java.lang.NullPointerException
 at
 org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
 at
 org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
 at
 org.wso2.andes.kernel.OnflightMessageTracker.handleAckReceived(OnflightMessageTracker.java:399)
 at
 org.wso2.andes.kernel.distruptor.inbound.AckHandler.ackReceived(AckHandler.java:104)
 at
 org.wso2.andes.kernel.distruptor.inbound.AckHandler.onEvent(AckHandler.java:83)
 at
 org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:127)
 at
 org.wso2.andes.kernel.distruptor.ConcurrentBatchEventHandler.onEvent(ConcurrentBatchEventHandler.java:37)
 at
 com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
 at
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
 at
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
 at java.lang.Thread.run(Thread.java:745)
 [2015-07-10 10:56:11,000] ERROR
 {org.wso2.andes.kernel.distruptor.LogExceptionHandler} -  [ Sequence:
 333163 ] Exception occurred while processing inbound events.Event type:
 ACKNOWLEDGEMENT_EVENT
 java.lang.NullPointerException
 at
 org.wso2.andes.kernel.OnflightMessageTracker$MsgData.decrementDeliveryCount(OnflightMessageTracker.java:211)
 at
 org.wso2.andes.kernel.OnflightMessageTracker$MsgData.access$700(OnflightMessageTracker.java:117)
 at