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Home > Archive > Perlbal > October 2007 > Perlbal crash
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| Anup Shukla 2007-10-19, 1:12 am |
| Hi All,
We have been running 2 instances of Perlbal successfully for several months.
However one of the instances has now suffered two crashes in a weeks time.
The first crash was without any message in the logs.
The second one (happened last night) has this in the logs:
<log-snip>
crash log: Negative length at
/usr/lib/perl5/site_perl/5.8.5/Danga/Socket.pm line 1133
</log-snip>
What do i need to check for?
Any help/pointers appreciated.
Thank you.
Regards.
A.S
| |
| Anup Shukla 2007-10-19, 1:12 am |
| Anup Shukla wrote:
> Hi All,
>
> We have been running 2 instances of Perlbal successfully for several
> months.
>
> However one of the instances has now suffered two crashes in a weeks time.
>
> The first crash was without any message in the logs.
>
> The second one (happened last night) has this in the logs:
>
> <log-snip>
> crash log: Negative length at
> /usr/lib/perl5/site_perl/5.8.5/Danga/Socket.pm line 1133
> </log-snip>
>
> What do i need to check for?
>
> Any help/pointers appreciated.
>
> Thank you.
>
> Regards.
> A.S
>
Ha.. replying to my own mail ;-)
Now, i dont know much of PERL (as a matter of fact, not one bit)
But reading through Socket.pm
<snip>
# if this is too high, PERL quits(!!). reports on mailing lists
# don't seem to point to a universal answer. 5MB worked for some,
# crashed for others. 1MB works for more people. let's go with 1MB
# for now. :/
my $req_bytes = $bytes > 1048576 ? 1048576 : $bytes;
my $res = sysread($sock, $buf, $req_bytes, 0);
</snip>
Is it that $bytes (and as a result) $req_bytes is having a value < 0 and
thats causing sysread() to get crazy?
If yes, can i simply make $req_bytes = 0 if $bytes < 0 ?
I dont know if what i think makes sense.
Just a speculation.
Regards,
A.S
| |
| komtanoo.pinpimai@livetext.com 2007-10-22, 7:12 pm |
| my $req_bytes =3D $bytes > 8096 ? 8096 : $bytes;
This works for me(debian something). Every time I install Danga::Socket, =
I
will need to make this change otherwise it will fail on large file
requests. I tried 512K once, but didn't work. I believe the golden number
that works for all systems must be in the range of [8096,512K).
On Thu, October 18, 2007 10:01 pm, Anup Shukla wrote:
> Anup Shukla wrote:
>
>
> Ha.. replying to my own mail ;-)
>
>
> Now, i dont know much of PERL (as a matter of fact, not one bit)
>
>
> But reading through Socket.pm
>
>
> <snip>
> # if this is too high, PERL quits(!!). reports on mailing lists
> # don't seem to point to a universal answer. 5MB worked for some,
> # crashed for others. 1MB works for more people. let's go with 1MB
> # for now. :/
> my $req_bytes =3D $bytes > 1048576 ? 1048576 : $bytes;
>
> my $res =3D sysread($sock, $buf, $req_bytes, 0); </snip>
>
>
> Is it that $bytes (and as a result) $req_bytes is having a value < 0 an=
d
> thats causing sysread() to get crazy?
>
> If yes, can i simply make $req_bytes =3D 0 if $bytes < 0 ?
>
>
> I dont know if what i think makes sense.
> Just a speculation.
>
>
> Regards,
> A.S
>
>
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