RE: POE process getting too busy

Hi Rocco,

thanks for your hints - would it help to start a debuggable run, e.g. with =
enbugger and trepan,=20
to find out where the problem happens?

Best regards,
	Markus=20

-----Original Message-----
From: Rocco Caputo [mailto:[email protected]]=20
Sent: den 25 augusti 2012 10:37
To: POE Mailing List
Subject: Re: POE process getting too busy

Since this problem is platform-specific, the best I can manage without acce=
ss to the machine is advice.

Web searches imply that Solaris may be broken, the program may have run out=
 of file descriptors, an OS upgrade may have broken compatibility with an o=
lder build of Perl, or some other issue:

https://community.emc.com/thread/111914
http://dbaspot.com/solaris/242660-high-cpu-utilization-solaris-10-a.html
http://www.mail-archive.com/[email protected]/msg04283.html
http://developerweb.net/viewtopic.php?id=3D5481
http://www.symantec.com/business/support/index?page=3Dcontent&pmv=3Dprint&i=
mpressions=3D&viewlocale=3D&id=3DTECH163245
http://wesunsolve.net/bugid/id/6404383

--
Rocco Caputo <[email protected]>

On Aug 21, 2012, at 06:09, Markus Jansen wrote:

> Hi,
>=20
> thanks a lot for the immediate answer, I also changed the code immediatel=
y, and started another long-term test run.
> Just found the process 99% busy again - the good news is that the signal =
pipe does not seem to be the culprit :-).
>=20
> Any other suggestions are highly welcome ...
>=20
> Thanks & best regards,
> 	Markus
>=20
> -----Original Message-----
> From: Tod McQuillin [mailto:[email protected]]
> Sent: den 16 augusti 2012 02:46
> To: Markus Jansen
> Cc: [email protected]
> Subject: Re: POE process getting too busy
>=20
> On Wed, 15 Aug 2012, Markus Jansen wrote:
>=20
>> I have discovered an annoying phenomenon, where after some while=20
>> (days, weeks) a process (which is part of a multi-server POE network) al=
l of a sudden goes berzerk by using all resources of its CPU.
>> The good news is that the process itself remains fully functional, but f=
rom a system usage/load perspective, the situation is quite intolerable.
>=20
> This sounds very familiar to me.
>=20
> I encountered a similar problem on solaris and was able to make it stop b=
y putting the following line of code at the beginning of my POE program:
>=20
> BEGIN { eval "sub POE::Kernel::USE_SIGNAL_PIPE () { 0 }" }
>=20
> There seems to be a problem with the signal pipe on some platforms, but I=
 haven't yet done more research to track down what's going wrong.
> --
> Tod