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 06 Nov 2009, Jimmy Ngai, Forum, Run multiple frontend on the same host
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 27 Nov 2009, Stefan Ritt, Forum, Run multiple frontend on the same host
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07 Dec 2009, Jimmy Ngai, Forum, Run multiple frontend on the same host
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08 Dec 2009, Stefan Ritt, Forum, Run multiple frontend on the same host 
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12 Dec 2009, Jimmy Ngai, Forum, Run multiple frontend on the same host
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Message ID: 682
Entry time: 27 Nov 2009
In reply to: 669
Reply to this: 687
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| Author: |
Stefan Ritt |
| Topic: |
Forum |
| Subject: |
Run multiple frontend on the same host |
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> Dear All,
>
> I want to run two frontend programs (one for trigger and one for slow control)
> concurrently on the same computer, but I failed. The second frontend said:
>
> Semaphore already present
> There is another process using the semaphore.
> Or a process using the semaphore exited abnormally.
> In That case try to manually release the semaphore with:
> ipcrm sem XXX.
>
> The two frontends are connected to the same experiment. Is there any way I can
> overcome this problem?
That might be related to the RPC mutex, which gets created system wide now. I
modified this in midas.c rev. 4628, so there will be one mutex per process. Can you
try that temporary patch and tell me if it works for you? |