125266 - PAC: doesn't start up after set

Status: RESOLVED DUPLICATE of bug 99026

(Core :: Networking, defect)

Description

[Jurgen Botz]

I have a proxy.pac file that sends requests for a couple of specific domains
through Ssh forwarded connection (I'll attach this).  When I configure mozilla
for autmoatic proxy with this file (either with file:///proxy.apc url or with
http://localhost/proxy.pac) everything works as intended, proxying works great.
 But after I exit mozilla and try to start it again, no browser window comes up.
 If I have multiple profiles, the profile selector comes up and I chose my
profile and then nothing more happens, no browser window appears.

If I then kill the mozilla processes and hand-edit my prefs.js to take out the
two lines that set up the autoproxy, the mozilla starts fine again.

This is with 0.9.8 and previous builds through at least 0.9.7.  I've had
intermittent problems with mozilla giving me a browser window on start for a
while but only now tracked it down reliably to the autoproxy config.  At least
it is repeatable with the autoproxy config now, but I'm a bit suspicious that at
least in some previous builds it was intermittent, i.e. even with autoproxy
configured if I just tried starting mozilla and if failed kill processes and try
again, sometimes it would succeed.  Not 100% sure about this, at the moment it
seems 100% repeatable.

Comment 1

[Jurgen Botz]

Attachment: The proxy.pac file I use (domain names changed to protect the guilty)

Comment 2

[timeless]

perhaps bug 125219?

Comment 3

[[e-mail]]

maybe a worsening of bug 112969.

I never functional tested 0.9.6, or 0.9.7, so this may have snuck in.

Comment 4

[Jurgen Botz]

I still have this problem, and it's a real PITA.  I'd like to try to track it
down a bit more... I suspect that I'd be able to figure out what's going on if I
could strace mozilla to the point where it hangs, but strace doesn't seem to
work well with mozilla on Linux.  Is there a solution for this (strace not
working), and if so could you point me at instructions?

Comment 5

[benc]

You should try to isolate the point of failure. 

Due to the efforts of several contributors, most PAC bugs can be found by
searching the summary for "PAC:"

You might find you are using a busted function call.

The other way is to start with a very simple PAC file and grow it to some
failure point.

Comment 6

[Jurgen Botz]

Actually it has nothing to do with the contents of the PAC file... I've already
checked that and I get the same hang with even the most trivial PAC file, i.e.

function FindProxyForURL(url, host) {
        return "DIRECT";
}

Comment 7

[benc]

+qawanted

Is this Linux-only?

Comment 8

[Jurgen Botz]

Yes, this is Linux only as far as I know, and may be specific to RedHat 7.1
(with all current RH updates), as I haven't had a chance to try others.  I will
try to do so later.  I've finally gotten a version of strace that works, but I
don't see any obvious source of problems in the output... but that may be just
because I don't know what to look for, so I'm going to attach a gzipped copy in
case someone wants to look at it...

Comment 9

[Jurgen Botz]

Attachment: gzipped strace output

this is strace output for a mozilla which is hanging before opening any
windows.

Comment 10

[benc]

Temporarily "futuring" all PAC&SOCKS bugs to clear new-networking queue.

I will review later. (I promise)

If you object, and can make a case for a mozilla 1.0 fix, please reset milestone
to  "--" or email me.

Comment 11

[Jurgen Botz]

This stopped happening around the time of the .99 release.
No change in my config... it was definitely a bug, but it
seems to be gone.

Comment 12

[benc]

If you can asiciate this with a specific fix, then this is should be a dupe.

If not, then this is a works for me...

Comment 13

[benc]

This was a dupe.
+verifyme, +qawanted
prefixed summary, for the record.
Jurgen: as owner, you can verify this...

*** This bug has been marked as a duplicate of 99026 ***