Gary Mills wrote:
> I'm still looking for the place where it gets blocked.

I've attached a simple dtrace hack that might help.  Save it as
"alrm.d", chmod +x, and run "./alrm.d -p <pid-of-server>".  (Or if
running from a command line, "./alrm.d -c <command-line-and-args>".)

-- 
James Carlson         42.703N 71.076W         <carls...@workingcode.com>
#!/usr/sbin/dtrace -s -

pid$target:libc.so:sigprocmask:entry
/arg0==1/
{
        self->sig = ((sigset_t *)copyin(arg1, sizeof (sigset_t)))->__sigbits[0];
}

pid$target:libc.so:sigprocmask:entry
/arg0==1 && (self->sig & 0x2000)/
{
        ustack();
}
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