Re: No child processes - system limit?

Normally, you'd get this error (ECHILD) if you wait for a child, but there is no child, e.g.

$ perl -e 'die $! if wait == -1'
No child processes at -e line 1.
[download]

In other words, I'm not sure if this is (directly) related to some resource limit at all... (though, of course, it might be a follow-up error of some code doing a wait for a child that never had been created, due to a resource limit like memory, or max children per user).

Comment on Re: No child processes - system limit? Select or Download Code

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Re^2: No child processes - system limit? by clinton (Priest) on Apr 01, 2010 at 14:15 UTC
Well, the reason I'm thinking resource limit is that this only occurs when busy, and then a couple of seconds later it works fine again. The docs for select indicate that this is the `select(2)` system call, but the docs for that say the following: ...On error, -1 is returned, and errno is set appropriately;... and lists the following errors: EBADF An invalid file descriptor was given in one of the sets. (Perhaps a file descriptor that was already closed, or one on which an error has occurred.) EINTR A signal was caught; see signal(7). EINVAL nfds is negative or the value contained within timeout is invalid. ENOMEM unable to allocate memory for internal tables. ... none of which correspond to the `no child processes`, and leaving me at a bit of a loss	[reply] [d/l] [select]
Re^3: No child processes - system limit? by almut (Canon) on Apr 01, 2010 at 14:26 UTC
What do you get for `$ getconf CHILD_MAX` [download] (or `getconf -a`, just in case...)	[reply] [d/l] [select]
Re^4: No child processes - system limit? by clinton (Priest) on Apr 01, 2010 at 14:39 UTC
for `getconf CHILD_MAX` i get: 27968 for `getconf -a` Read more... (13 kB) any of these mean anything to you?	[reply] [d/l] [select]
Re^5: No child processes - system limit? by almut (Canon) on Apr 01, 2010 at 15:04 UTC
Re^6: No child processes - system limit? by clinton (Priest) on Apr 01, 2010 at 15:36 UTC


go ahead... be a heretic
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