Hi,
We have a problem with DBD::Sybase appearing to hang using mod_perl with perl
5.8.5 under multiple processes. When I run it using the -X flag
(single-process), everything is fine, but when I don't use -X and it forks
children it hangs the sybase processes. The Oracle processes still respond.
DBD::Oracle-1.15 works fine in both multi-mode and single-mode.
DBD::Sybase-1.04
perl-5.8.5
mod_perl-1.29
apache-1.3.27
linux
Attached are the perl config and the loaded modules lists from
admin/perl-status.
I don't know if this helps, (this may be normal behaviour...), but the parent
process appears to be doing this:
strace -p 29080
select(0, NULL, NULL, NULL, {0, 280000}) = 0 (Timeout)
time(NULL) = 1100073030
wait4(-1, 0xbffec77c, WNOHANG, NULL) = 0
select(0, NULL, NULL, NULL, {1, 0}) = 0 (Timeout)
time(NULL) = 1100073031
wait4(-1, 0xbffec77c, WNOHANG, NULL) = 0
select(0, NULL, NULL, NULL, {1, 0}) = 0 (Timeout)
time(NULL) = 1100073032
wait4(-1, 0xbffec77c, WNOHANG, NULL) = 0
Various of the original child processes appear to be doing this:
strace -p 29087
accept(16,
And the most recent child process appears to be sitting on a read:
strace -p 29236
read(5,
Anyone have any bright ideas, please?
Ciao
Richard Foley
http://www.oreilly.com/catalog/perldebugpr/
Visit our website at http://www.ubs.com
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