Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Hi all

When running multiple HTTP requests via LWP, I occasionally get this error: select failed: no child processes. If I catch the error, and wait a little, I can repeat the request successfully.

The code from LWP::Protocol::http which throws this error is this:

269 SELECT: 270 { 271 my $nfound = select($rbits, $wbits, undef, $se +l_timeout); 272 if ($nfound < 0) { 273 if ($!{EINTR} || $!{EAGAIN}) { 274 if ($time_before) { 275 $sel_timeout = $sel_timeout_before + - (time - $time_before); 276 $sel_timeout = 0 if $sel_timeout < + 0; 277 } 278 redo SELECT; 279 } 280 die "select failed: $!"; 281 } 282 }

It seems I am running into some system limit, but I can't figure out which. ulimit -a on this (linux) system outputs this:

core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 27968 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 16384 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 27968 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited

And the limits as reported by BSD::Resource are as follows:

RLIMIT_CPU : -1 RLIMIT_OPEN_MAX : 16384 RLIMIT_LOCKS : -1 RLIMIT_VMEM : -1 RLIMIT_FSIZE : -1 RLIMIT_STACK : 10485760 RLIMIT_MEMLOCK : 32768 RLIMIT_NOFILE : 16384 RLIMIT_DATA : -1 RLIMIT_NPROC : 27968 RLIMIT_OFILE : 16384 RLIMIT_AS : -1 RLIMIT_CORE : 0 RLIMIT_RSS : -1

Any ideas what I can change to get around this?

thanks

Clint


In reply to No child processes - system limit? by clinton

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others pondering the Monastery: (5)
As of 2022-12-08 03:52 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?