xulrunner often freeze at dnsResolve() when using autoproxy

Bug #474008 reported by Sheng Yang on 2009-11-04
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
firefox-3.5 (Ubuntu)
Undecided
Unassigned

Bug Description

Binary package hint: firefox-3.5

After upgrade to 9.10 and firefox 3.5, I noticed that on the some pages, the firefox would be freezed for a while(tens of seconds), then continue to work. At first I don't know what cause this, and suspect website's js. But at one time when freezing, firefox told me:

>A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see >if the script will complete.
>
>Script: file:///usr/lib/xulrunner-1.9.1.4/components/nsProxyAutoConfig.js:133

Then I know the reason. I am using autoproxy script in the company, then I tried one certain proxy and it work. So seems the following function is the root cause(I don't have this problem when using firefox 3.0):

129 // wrapper for resolving hostnames called by PAC file
130 function dnsResolve(host) {
131 host = XPCSafeJSObjectWrapper(host);
132 try {
133 return dns.resolve(host, 0).getNextAddrAsString();
134 } catch (e) {
135 return null;
136 }
137 }

So I believe there is some reasons that dns.resolve() didn't return quickly. But seems not due to my proxy server.

Thanks in advance to look into this.

Micah Gersten (micahg) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 417757, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.

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