937371 - process lingers after shutdown (hang) when network access is limited (down)

Status: NEW

(MailNews Core :: Networking, defect)

Description

[Mihai Hanor]

Attachment: stack traces for all threads (25beta1)

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 (Beta/Release)
Build ID: 20131025151332

Steps to reproduce:

I'm not sure this problem is a duplicate of some other "shutdown hang" issue. But it's reproducible:
1. My Thunderbird client is set to automatically connect to an IMAP server and check for new e-mails, at startup.
2. My Thunderbird client runs on a Windows 7 64 bit machine, which connects to the Internet through a router. The IMAP server is on the Internet side.
3. When there's no Internet connection available, or by emulating such a condition (dropping packets on the router and flushing the DNS cache on the machine running Thunderbird). The gateway/router is always accessible to the client machine, even if the Internet connection is down.
4. Start Thunderbird and close it in the first few seconds, while it tries to resolve the IMAP server address. At least that's what I think it tries to do.

Notes:
1. I have upgraded from release build 24.1.0 to 25beta1, I've even tried earlybird 27.0a2.
2. The Mozilla source server doesn't seem to provide sources for any of the above Thunderbird builds.


Actual results:

The Thunderbird process lingers after I have closed its window, with zero CPU usage. I have to manually terminate it.


Expected results:

The Thunderbird process should not linger in memory, minutes after I've closed the program's window.

Comment 1

[Wayne Mery (:wsmwk)]

Is it easy to reproduce?
Can you do with current Earlybird?

Comment 2

[Wayne Mery (:wsmwk)]

This is not actionable unless we are able to have more information from you.

Comment 3

[Mihai Hanor]

Sorry, I didn't get any e-mails, I'm not sure why.

To answer to your question: yes, it's fairly easy to reproduce. All I need is to start it, while my router is up and the Internet connection is down.

Comment 4

[Mihai Hanor]

As I've said in the bug report, I have tried Earlybird.

Comment 5

[Mihai Hanor]

I'll try the current version of Earlybird, tomorrow, after work. Maybe the Mozilla source server has the necessary symbols, this time.

Comment 6

[Mihai Hanor]

I've also edited my e-mail preferences, so I'm receiving the proper notifications.
If you think this is a critical issue, please change it. I've changed it to 'normal' because I thought I erroneously set it to 'critical', when I first reported the bug.

Comment 7

[Wayne Mery (:wsmwk)]

hangs are critical by definition

if possible, please use builds at https://ftp.mozilla.org/pub/mozilla.org/thunderbird/nightly/latest-comm-central/

Comment 8

[Mihai Hanor]

I have reproduced the issue with thunderbird-33.0a1.en-US.win32.installer. What do you need?

Comment 9

[Mihai Hanor]

Attachment: thunderbird-33.0a1.en-US.win32.stack_hang.txt

Comment 10

[Mihai Hanor]

The application verifier is also catching a double-free, when the daily build starts. This is not happening with the stable version, 24.6.0

Comment 11

[Mihai Hanor]

Attachment: thunderbird-33.0a1.en-US.win32.clean_stack_hang.txt

Comment 12

[Wayne Mery (:wsmwk)]

Mihai, do you Still see this when using a current beta?
http://www.mozilla.org/en-US/thunderbird/channel/

Comment 13

[Mihai Hanor]

I have just finished testing thunderbird-38.0a2.en-US.win32. I see that a watchdog is implemented in the new builds. The issue is still present. The crash reporter starts a minute (or so) after the issue is triggered.

https://crash-stats.mozilla.com/report/index/101e000f-ba0f-44d0-86a0-6b97b2150314
https://crash-stats.mozilla.com/report/index/819fd8a9-8c5a-4730-911e-9bbed2150314

Comment 14

[Mihai Hanor]

Attachment: thunderbird-38.0a2.en-US.win32.stack_hang.txt

Comment 15

[Wayne Mery (:wsmwk)]

Yes, a watchdog was implemented.

Mihai, can you give us another crash ID so we can see if the signature changed?

Comment 16

[Mihai Hanor]

Here is a crash ID for Earlybird 39.0a2

http://crash-stats.mozilla.com/report/index/bp-acb8fcb7-87e3-46ae-84c9-af6df2150509

Comment 17

[Wayne Mery (:wsmwk)]

Thanks