Re: NullPointerException

I am running TINI1.12. Since posting this message I found some 
synchronization errors in the program. Monitor is a producer of status 
information. Method sendR1200InfoMessage gets called to use that status 
information. There is another thread that can also invoke 
sendR1200InfoMessage asynchronously. I wonder if the 
NullPointerException can be caused by this error.

Bryan Armstrong wrote:

> Wes Stupar wrote:
>
>> My TINI400 program has a nasty bug that causes the 
>> NullPointerException. Here is an example of the stack trace:
>> java.lang.NullPointerException
>>   in com.iqstor.IQcom.unitInformationMessage.<init>(@JPC=43)
>>   in com.iqstor.IQcom.r1200InformationBroadcastMessage.<init>(@JPC=2)
>>   in com.iQstor.esp2r12.UDPCom.sendR1200InfoMessage(@JPC=35003a)
>>   in com.iQstor.esp2r12.Monitor.run(@JPC=22029a)
>>   in java.lang.Thread.run(@JPC=22001a)
>>   in com.iQstor.esp2r12.TCPCom.run(@JPC=
>> Can someone help me interpret this trace? It was truncated, 
>> presumeably due to the crash. It seems to have been in the TCPCom 
>> thread (there are 6 threads running plus slush) and the Monitor 
>> thread. Is this a normal trace, to show two threads? Does the <init> 
>> mean that it is in the constructor of the class? The class 
>> r1200InformationBroadcastMessage extends unitInformationMessage.
>>
>> I have not been able to spot a place in the constructor for 
>> unitInformationMessage that could give rise to a null pointer. Any 
>> ideas would be appreciated.
>
>
> This looks like a dump from the Monitor thread, see the run() method. 
> Then, the function sendR1200InfoMessage was called.  Then two 
> constructors were called.
>
> What TINI version are you using?
>


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