[distcc] Re: Distcc freezes during compile

Martin Pool mbp at samba.org
Tue Feb 3 00:46:13 GMT 2004

On  2 Feb 2004, storri at torri.org wrote:
> Distcc version 2.12.1
> Platform: Redhat 9
> Compiler: gcc (GCC) 3.2.2 20030222 (Red Hat Linux 3.2.2-5)
> Action: Attempting to compile personal application

> There are six distcc hosts being used for the compiler process. Two
> hosts are running stock RedHat 9 kernels. Four hosts running distccd
> and the controller using distcc are using a custom 2.4.18 kernel
> with preemption. During the compilation process all works normally
> until the contoller freezes. The machine locked solid with no
> response to Ctrl-C (accessing controller via ssh) or direct keyboard
> access. The only method to recover control is to soft reboot the
> machine via the front switch. The machines were able to compile work
> with the 2.5 version of distcc. Attached is a compressed tarball of
> the build process from the controller.

This is a kernel bug -- applications should never hang the machine.
Switch to stock 2.4.24 and see if the problem can still be reproduced.
If it can, let us know.  If that works, see if the 2.4.24 preemption
patch works.

> I had the distccd hosts running with log level set to critical but
> there was no meaningful output from those:

You need to set the log level to debug to get useful information.
=critical means "show only critical failures."

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