[mythtv-commits] Ticket #6983: deadlock on readReadyLock and socket lock
MythTV
mythtv at cvs.mythtv.org
Sat Sep 5 12:16:23 UTC 2009
#6983: deadlock on readReadyLock and socket lock
------------------------------+---------------------------------------------
Reporter: markspieth | Owner: ijr
Type: defect | Status: new
Priority: major | Milestone: unknown
Component: MythTV - General | Version: unknown
Severity: high | Resolution:
Mlocked: 0 |
------------------------------+---------------------------------------------
Description changed by markspieth:
Old description:
> there are 2 problems with customevent
>
> there is a deadlock between socket lock and readReadyLock and can happen
> on multi core machines. 4 cores or more with mythweb scheduling a program
> causes it to happen most times. doesnt seem to happen on a 2 core.
>
> There may be a better way to fix this, but the attached solution works.
>
> the 2nd is that customevent tries to send messages on sockets which are
> not connected (thus there are no listeners).
>
> it gives
> {{{
> write -> -1 565 BACKEND_MESSAGE[]:[]ASK_RECORDING 1 0 0 0[]:[]Ten
> News[]:[][]:[]A...
> writeStringList: Error, called with unconnected socket
> }}}
> type errors. pointless doing this
>
> see also #6895 for this one.
New description:
there are 2 problems with customevent
there is a deadlock between socket lock and readReadyLock and can happen
on multi core machines. 4 cores or more with mythweb scheduling a program
causes it to happen most times. doesnt seem to happen on a 2 core.
There may be a better way to fix this, but the attached solution works.
the 2nd is that customevent tries to send messages on sockets which are
not connected (thus there are no listeners).
it gives
{{{
write -> -1 565 BACKEND_MESSAGE[]:[]ASK_RECORDING 1 0 0 0[]:[]Ten
News[]:[][]:[]A...
writeStringList: Error, called with unconnected socket
}}}
type errors. pointless doing this
see also #6894 for this one.
--
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Ticket URL: <http://svn.mythtv.org/trac/ticket/6983#comment:1>
MythTV <http://www.mythtv.org/>
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