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On Tue, May 04, 2010 at 01:06:15PM -0700, Sid Stuart wrote:
> We upgraded ldirectord last week to heartbeat-ldirectord.x86_64
> 2.1.4-11.el5 from the Fedora EPEL repository. After the upgrade we started
> seeing error messages like,
>
> [Tue May 4 11:09:36 2010|www.228|3608] system(/sbin/ipvsadm -e -t
> 216.246.59.228:80 -r 172.20.1.121:80 -m -w 20) failed: No child processes
> [Tue May 4 11:09:36 2010|www.228|3608] Restored real server:
> 172.20.1.121:80 (216.246.59.228:80) (Weight set to 20)
>
> ipvsadm -l shows the operation worked, but the message is a concern. Does
> anyone know of a fix?
Hi,
that is rather curious. Are you able to reproduce the problem?
If so, could you try applying the following patch to ldirectord
and see if it sheds any light on the problem?
Index: agents/ldirectord/ldirectord.in
===================================================================
--- agents.orig/ldirectord/ldirectord.in 2010-05-05 18:15:06.000000000
+1000
+++ agents/ldirectord/ldirectord.in 2010-05-05 18:19:53.000000000 +1000
@@ -819,6 +819,11 @@ use Sys::Hostname;
use POSIX qw(setsid :sys_wait_h);
use Sys::Syslog qw(:DEFAULT setlogsock);
+use IPC::Open3;
+use Symbol qw(gensym);
+
+$| = 1;
+
BEGIN
{
# wrap exit() to preserve replacability
@@ -4380,12 +4385,33 @@ sub system_wrapper
{
my (@args)=(@_);
- my $status;
+ my $status, $pid, @log;
&ld_log("Running system(@args)") if $DEBUG>2;
- $status = system(@args);
- if($status != 0) {
- &ld_log("system(@args) failed: $!");
+
+
+ my $pid = open3(gensym, ">&STDERR", \*PH, @args);
+ while( <PH> ) {
+ push @log, $_;
+ }
+ waitpid($pid, 0);
+ $status = $?;
+
+ if($status == -1) {
+ &ld_log("system(@args) failed to execute: $!");
+ } elsif ($status & 127) {
+ &ld_log("system(@args) died with signal " . ($status & 127) .
+ ", " . ($status & 128) ? "with" : "without" .
+ " coredump");
+ } elsif ($status != 0) {
+ &ld_log("system(@args) failed with exit-status " .
+ ($status >> 8));
+ }
+
+ if ($status != 0) {
+ foreach (@log) {
+ &ld_log("stdio/stderr: $_");
+ }
}
return($status)
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