What causing this error in Linux server?

MichaelBalack
MichaelBalack used Ask the Experts™
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This is a SuSE 11 with SP3 virtual machine. In /var/log/message, i found a line as follows,

     "2019-07-19T17:03:17.852797+08:00 zlnx01 org.a11y.atspi.Registry[24075]: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server "localhost:10.0"")

What is this error about? Does this refer to the "X windows" of sshd. btw, only sshd is running (remote desktop). This error only happens once. Does this sort of soft error?

Thanks in advance.
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MichaelBalackSenior System Engineer

Author

Commented:
more details in /var/log/messages during that time,

2019-07-19T17:03:17.849403+08:00 zlnx01 sshd[9732]: pam_unix(sshd:session): session closed for user root
2019-07-19T17:03:17.852797+08:00 zlnx01 org.a11y.atspi.Registry[24075]: XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server "localhost:10.0"
2019-07-19T17:03:17.853171+08:00 zlnx01 org.a11y.atspi.Registry[24075]:       after 110 requests (110 known processed) with 0 events remaining.
nociSoftware Engineer
Distinguished Expert 2018
Commented:
It refers to X11 application(client), running into a problem on display localhost:10.0

ssh using remote X session will typically  be connect to through  localhost:10.0...
So some program running on the remote platform mentions trouble using the localhost:10.0 display (whch is accross a sshd-tunnel)  you local display.

So anything breaking this connection, or causing timeouts on ssh session, local X display problems, network issues etc. can cause this.
Closing the ssh session will break a tunnel ==> all connection running through this tunnel.


(Oh btw,   the X(org) server is the server here, serving a display panel, keyboard, mouse etc..   to some application running connected to it.
(The running application is effectively the keyboard/mouse/display client...).
Fractional CTO
Distinguished Expert 2018
Commented:
EAGAIN (try again) is what Error 11 means.

So... if it only occurs once then clears up, this means something failed once + then worked.

Searching for - org.a11y.atspi.Registry XIO fatal IO error 11 - turns up many Distros reporting this problem, with the normal fix being to just ignore the problem.

Start by visiting your Distro's related support forums.

Also, you mentioned you're using virtualization, so, if you don't really use X11, just remove all traces of X11.
MichaelBalackSenior System Engineer

Author

Commented:
Thanks for both experts, really appreciate with the explanation.

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