Re: Using Barrier with high load and got the error "Can't add waiter, no barriers" returned

Assuming you want all the threads across all the processes to be
synchronised, just use some constant for the barrier name, e.g.

    barrrierName="phase1"

- Phil



On 28/12/13 07:48, Thiraphat Srisati wrote:
> Thanks much Phil for your help. I will try to configure the timeout to something else and re-compile the code. Regarding the unique id, how should I revise the code to avoid duplication?
>
> Please help
>
> Thiraphat
>
> On Dec 27, 2013, at 10:15 PM, Philip Aston <[email protected]> wrote:
>
> My guess is that the console process is incorrectly determining that the
> worker process is dead and cancelling its barriers. The console relies
> on regular "heartbeat" messages from each worker process. It is possible
> that a lengthy GC or busy network might have delayed this. The console
> will consider any worker that has failed to report for 2 seconds to be
> dead. Unfortunately, this isn't configurable, so you'll have to
> recompile the code to change it. Look at
> net.grinder.console.communication.ProcessStatusImplementation.FLUSH_PERIOD.
> I've opened bug #244 to improve this in the future.
>
> Also, I see that your unique ID generator isn't working. In your log
> output, I see the same ID being repeatedly used. I'm guessing that the
> whole reason you want to use a barrier is for cross-process
> synchronisation. This implies that you want to use a well known name,
> not a generated one.
>
> - Phil
>
>> On 17/12/13 12:39, Thiraphat wrote:
>> The full error returned from a console.
>>
>> -----
>>
>>
>> D:\Distribution\AC>PATH=C:\Program Files\Java\jre6\bin;C:\Program
>> Files\OpenSSH\
>> bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program
>> Files\IBM
>> \Director\bin;C:\Program Files\Common
>> Files\IBM\ICC\cimom\bin;C:\WINDOWS\system3
>> 2\WindowsPowerShell\v1.0;D:\QueryTesting\TclClient
>>
>> D:\Distribution\AC>java -cp D:\Grinder\grinder-3.6\lib\grinder.jar;
>> net.grinder.
>> Console
>> Exception in thread "main" java.lang.IllegalStateException: Can't add
>> waiter, no
>> barriers
>>        at
>> net.grinder.synchronisation.AbstractBarrierGroups$BarrierGroupImpleme
>> ntation.addWaiter(AbstractBarrierGroups.java:217)
>>        at
>> net.grinder.console.synchronisation.ProcessBarrierGroups$1.addWaiter(
>> ProcessBarrierGroups.java:87)
>>        at
>> net.grinder.console.synchronisation.WireDistributedBarriers$3.handle(
>> WireDistributedBarriers.java:100)
>>        at
>> net.grinder.console.synchronisation.WireDistributedBarriers$3.handle(
>> WireDistributedBarriers.java:96)
>>        at
>> net.grinder.communication.MessageDispatchSender.send(MessageDispatchS
>> ender.java:116)
>>        at
>> net.grinder.console.communication.ConsoleCommunicationImplementation.
>> processOneMessage(ConsoleCommunicationImplementation.java:267)
>>        at
>> net.grinder.console.ConsoleFoundation.run(ConsoleFoundation.java:197)
>>
>>        at net.grinder.Console.run(Console.java:73)
>>        at net.grinder.Console.main(Console.java:92)
>>
>>
>


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