On 10/ 5/11 07:52 AM, Bernd Schubert wrote:
Hello,
I'm getting out of ideas how to get rid of an annoying problem:
Maximum number of clients reachedMaximum number of clients reachedMaximum number
of clients reachedMaximum number of clients reachedError: cannot open display:
:0
Somehow I get this message in my xerrors log file each and every day after a few
hours and I have no idea what causes it. So far I have
- switched from a small xdmcp client to a real desktop system
- avoided to run application over remote-X (which we are frequently doing here,
not only on xdmcp systems)
- switched from gnome to kde
- monitored X usage with xrestop
- monitored open file descriptors of X
Nothing of that has helped or revealed anything so far.
If the issue comes up, xrestop does not show much different values than after a
start of my session. Counting the number of open files with
lsof -p `pidof X` | wc -l
shows rather high number between 750 and 900, but so far not above 1000 (limit
is 1024). The /proc/$PID/fd shows even much less open FDs, usually between 150
and 250.
So it would be really nice, if there would be a way to figure out where the
limit of "Maximum number of clients" comes from.
The message in the X server comes from ErrorConnMax(), which is called when
AllocNewConnection fails, which can happen if:
- the number of connected clients has exceeed MaxClients (defaults to 256)
- malloc fails allocating memory for the new client
- NextAvailableClient is unable to find an available client id for the client
or client initialization otherwise fails
Unfortunately, the best I can offer is that the most likely explanation is
that there are indeed more clients connected than the maximum allows - perhaps
you have some clients that aren't closing down completely or are leaving
resources marked as retained on exit?
--
-Alan Coopersmith- [email protected]
Oracle Solaris Platform Engineering: X Window System
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