[ic] IC hanging in accept
mike at perusion.com
Wed Apr 25 11:11:03 EDT 2007
Quoting jeff at downtowndevelopmentplan.com (jeff at downtowndevelopmentplan.com):
> Does anyone else have any thoughts on sketchy behavior of Server.pm's
> housekeeping routine? I've been eyeing it for a while. Specifically
> the part where it iterates the list of active PIDs, killing off ones
> that meet the appropriate criteria. After the parent issues the kill
> successfully, it removes the PID from its list.
> The problem is that the child might not have responded to the kill, the
> parent performs no check to see if the process actually died. With IC,
> I find this is typically because the child is hung in an accept call
> (normal behavior). The situation seems to results in children stuck in
> accept that the IC parent thinks it has killed off.
> I don't have a any fantastic ideas for a solution. I believe that
> apache hits the children's sockets with some data to knock it out of
I don't know how we could do that -- it is monitoring the same
socket as every other iteration.
> Maybe IC could maintain two lists... the normal list of PIDs and then
> the list of PIDs that it thinks it killed last time. The second list
> could be checked during housekeeping runs and killed with more force
> if they still existed.
If I knew a real good way of doing that, I would. Suggestions welcome.
I have found the behavior of 5.5 with ChildLife set to be generally good,
rarely generating leftover processes. Have you seen big problems?
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