I've been using xpra server for a while running on RHEL 6.6. I recently upgraded my Windows 10 client from xpra 2.x to xpra 3.x. I don't know if the problem I'm seeing is correlated to the new client. In the past, I was able to maintain the same xpra session for months. I pretty much leave the Windows 10 client connected 24/7, even when my laptop is locked for the evening.
The problem is that relatively frequently now (about once a week), the xpra server process crashes while I'm away from my computer, causing the client to disconnect. At the time that this happens, I may for example be running a job overnight which is periodically printing to my gnome-terminal session. Initially, I'm not aware that the server has died, so I attempt to reconnect. Once I can't reconnect, I ssh to the machine running the server and confirm that the xpra server process has exited entirely, leaving the associated Xorg process running.
If I try to recover the Xorg session with the --use-display command line switch to xpra start, the server fails to start due to an XError:
2020-06-02 23:41:05,505 Error: cannot start the xpra server Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/xpra/scripts/server.py", line 1532, in run_server app.init_components(opts) File "/usr/lib64/python2.6/site-packages/xpra/server/server_base.py", line 272, in init_components self.load_existing_windows() File "/usr/lib64/python2.6/site-packages/xpra/x11/server.py", line 407, in load_existing_windows self._add_new_or_window(window) File "/usr/lib64/python2.6/site-packages/xpra/gtk_common/error.py", line 168, in __exit__ trap._exit(True) File "/usr/lib64/python2.6/site-packages/xpra/gtk_common/error.py", line 100, in _exit raise XError(get_X_error(error)) XError: XError: BadDamage (invalid Damage parameter) 2020-06-02 23:41:05,508 XError: BadDamage (invalid Damage parameter)
Interestingly, I am able to start an xpra shadow session attached to the running instance of Xorg, but since there is no window manager, it is not very usable.
I also tried killing ALL X11 applications connected to the running Xorg instance, except for my gnome-terminal, but I still get the error when trying to start a new xpra server and recover my Xorg session.
I'd really like to figure out some way to recover my Xorg session by restarting xpra when this happens, because it seems to be occurring more and more often all of a sudden.
the xpra server process crashes while I'm away from my computer
When the server crashes, what's in your server log? (could be something like the memleak reported in #2730)
When you can't recover with
--use-display, please try adding
-d all and posting the log file. (or at least
Looks like there's an override-redirect window in a weird state, r26594 should help with that: at least the other windows should be loaded properly and the server should start. (you can apply it by hand to your server version) But I still need to understand the root error to fix it properly.
I was able to recover my Xorg instance by manually applying your patch. I have attached the log file with '-d all' for my recovery attempt prior to the patch.
I had already logged in through PuTTY and killed as many x11 applications as possible hoping to kill the one that was causing the problem. At this point, I have my gnome-terminal back, but I'm not sure which other application window was causing the problem. Could it have been something transient like an error dialog or a tooltip?
I'll try to remember to check the server log next time it crashes.
Also, I actually have a "prefixed" installation of xpra that I "installed" by manually extracting rpms to a user-writeable directory. This "prefix", along with the username, hostname, and other sensitive info are edited out of the log.
Thanks for the logs.
Here's the cause:
[36m2020-06-04 13:23:16,008 Warning: failed to manage client window 0x735ae4:[0m 848 [36m2020-06-04 13:23:16,008 window 0x735ae4 disappeared already[0m 849 [36m2020-06-04 13:23:16,008 850 Traceback (most recent call last): 851 File "/usr/lib64/python2.6/site-packages/xpra/x11/gtk2/wm.py", line 352, in _manage_client 852 win = WindowModel(self._root, gdkwindow, desktop_geometry) 853 File "/usr/lib64/python2.6/site-packages/xpra/x11/gtk2/models/window.py", line 163, in __init__ 854 self.call_setup() 855 File "/usr/lib64/python2.6/site-packages/xpra/x11/gtk2/models/core.py", line 229, in call_setup 856 self._composite.setup() 857 File "/usr/lib64/python2.6/site-packages/xpra/x11/gtk2/composite.py", line 55, in setup 858 WindowDamageHandler.setup(self) 859 File "/usr/lib64/python2.6/site-packages/xpra/x11/gtk2/window_damage.py", line 62, in setup 860 raise Unmanageable("window %#x disappeared already" % xid) 861 Unmanageable: window 0x735ae4 disappeared already[0m 862 [36m2020-06-04 13:23:16,079 XGetSelectionOwner(_XSETTINGS_S0)=0[0m 863 [36m2020-06-04 13:23:16,079 Fetching current XSettings data, owner=None[0m 864 [36m2020-06-04 13:23:16,079 default_xsettings=None[0m 865 [31m2020-06-04 13:23:16,079 Error: cannot start the xpra server 866 Traceback (most recent call last): 867 File "/usr/lib64/python2.6/site-packages/xpra/scripts/server.py", line 1531, in run_server 868 app.init(opts) 869 File "/usr/lib64/python2.6/site-packages/xpra/x11/server.py", line 195, in init 870 X11ServerBase.init(self, opts) 871 File "/usr/lib64/python2.6/site-packages/xpra/x11/x11_server_base.py", line 94, in init 872 self.x11_init() 873 File "/usr/lib64/python2.6/site-packages/xpra/gtk_common/error.py", line 168, in __exit__ 874 trap._exit(True) 875 File "/usr/lib64/python2.6/site-packages/xpra/gtk_common/error.py", line 100, in _exit 876 raise XError(get_X_error(error)) 877 XError: XError: BadWindow[0m 878 [31m2020-06-04 13:23:16,126 XError: BadWindow[0m
I am going to close this as fixed, even though the underlying bug is not really fixed. But until I can reproduce it myself, this will have to do.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2795