Bug 176216 - no way to remove stale lock file
Summary: no way to remove stale lock file
Alias: None
Product: Fedora
Classification: Fedora
Component: liferea   
(Show other bugs)
Version: 5
Hardware: All Linux
Target Milestone: ---
Assignee: Brian Pepple
QA Contact: Fedora Extras Quality Assurance
Keywords: Reopened
Depends On:
TreeView+ depends on / blocked
Reported: 2005-12-20 10:02 UTC by Tim Waugh
Modified: 2007-11-30 22:11 UTC (History)
2 users (show)

Fixed In Version: 1.0.14
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-07-17 00:44:04 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Tim Waugh 2005-12-20 10:02:42 UTC
Description of problem:
On occasion, a stale lock file ~/.liferea/lock may be left behind; this can
occur after a power outage, for instance.  When this happens, starting liferea
gives this dialog box:

'Another copy of Liferea was found to be running.  Please use it instead.  If
there is no other copy of Liferea running, please delete the "~/.liferea/lock"
lock file.'   [OK]

There ought to be a button to do that for you: to remove the lock file, and
continue.  (For example, GnuCash does this.)

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Start liferea
2. killall liferea-bin
3. Start liferea
Actual results:
Can't without opening a terminal or a file manager.

Comment 1 Brian Pepple 2006-05-31 15:01:55 UTC
The current versions should automatically remove the stale lock files if the
process that created it isn't running anymore. To allow this the lock file
contains the PID of the creating process.

So if the dialog pops up the program found the original process to be running
and continuing is not advisable.

If you are still experiencing this problem, please re-open this bug.

Comment 2 Tim Waugh 2006-06-03 11:41:52 UTC
liferea-1.0.14-2.fc5 still shows this behaviour.

What's more, it now seems to be crashing every time I log out, and so each time
I log in I am told to remove the lock file. :-/

Comment 3 Tom Georgoulias 2006-08-02 23:29:31 UTC
I've been experiencing a variation on this issue for the last few releases. 
When I quit liferea by selecting Program -> Quit using the toolbar menu, I'm ok.
 When I quit using the X button on the top, right hand side of the window, I am
prompted to remove a lock file when I try to relauch liferea.  Also, if I just
log out of Gnome and do not close any of my open applications before hand, I
will be prompted to remove a lock file when I log back in and restart liferea.

This behavior is still present in liferea-1.0.18-2.fc5, which I just installed

Comment 4 Tom Georgoulias 2006-08-02 23:36:18 UTC
Sorry, forgot to mention that when the lockfile error dialog pops up, the
liferea-bin process is still running and when I use strace -p to attach to the
process, I see something output like this scrolling by very quickly:

gettimeofday({1154562561, 258812}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=8,
events=POLLIN|POLLPRI}, {fd=10, events=POLLIN|POLLPRI}, {fd=11,
events=POLLIN|POLLPRI}, {fd=12, events=POLLIN|POLLPRI}, {fd=16, events=POLLIN}],
7, 99) = 0
gettimeofday({1154562561, 358047}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
gettimeofday({1154562561, 358326}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=8,
events=POLLIN|POLLPRI}, {fd=10, events=POLLIN|POLLPRI}, {fd=11,
events=POLLIN|POLLPRI}, {fd=12, events=POLLIN|POLLPRI}, {fd=16, events=POLLIN}],
7, 0) = 0
ioctl(3, FIONREAD, [0])                 = 0
gettimeofday({1154562561, 358756}, NULL) = 0

Comment 5 Pete Zaitcev 2006-09-16 02:01:09 UTC
Tom's issue is clearly different from the original bug where Liferea were
unable to remove obviously stale log upon restart. He has a situation where
old Liferea continus to run (erroneously, after getting WM_DELETE or such).
This needs a clone bug or a new bug.

Regarding Tim's problem, it's very curious. I used to have it too, with
his original version (from FC-4). I communicated with Lars and he seems
to have fixed this. I tested liferea-1.0.11-2.fc5 to fix the stale lock
removal. I'm on rawhide currently, and it works fine (e.g. I can kill
it with -9 and it restarts fine. However it will prompt for the lock
removal if other process hogs the PID, thus proving that the "kill with
zero signal" trick works).

Tim, when it prompts, can you check if other process sits at the old PID?
PID is in the symlink name, so:

[root@lembas zaitcev]# ls -l .liferea/lock
lrwxrwxrwx 1 zaitcev zaitcev 48 Sep  7 17:10 .liferea/lock ->
[root@lembas zaitcev]# ps -p 4583 u
zaitcev   4583  0.0  3.9 113184 20292 ?        Sl   Sep07   6:21 /usr/bin/lifere
[root@lembas zaitcev]# 

Comment 6 Pete Zaitcev 2006-09-16 02:04:56 UTC
Er... I didn't mean to close this.

Comment 7 Brian Pepple 2007-07-15 02:00:05 UTC
Tim, are you still seeing this bug?  I believe all the version in FC6 and above
don't use the lock file anymore.

Comment 8 Tim Waugh 2007-07-16 08:44:27 UTC
No, I'm not.

Comment 9 Brian Pepple 2007-07-17 00:44:04 UTC
I'm going to close this then, since liferea isn't using a lock file anymore.

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