[dolphin] [Bug 423818] New: After some time no kde application cant open, to many open files

[boospy]

https://bugs.kde.org/show_bug.cgi?id=423818

            Bug ID: 423818
           Summary: After some time no kde application cant open, to many
                    open files
           Product: dolphin
           Version: 20.04.2
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: linux at osit.cc
                CC: kfm-devel at kde.org
  Target Milestone: ---

benutze hier KDE Neon mit Plasma 5.19.1. Aber ich vermute mal es verhält sich
gleich zu Kubuntu. Seit einigen Wochen, wenn nicht sogar Monaten kommt es immer
wieder vor das im Betrieb einfach manche KDEapps nicht mehr öffnen. Zu diesen
zählen wissentlich Dolphin, Kate, Kdevelop, Systemsettings. Nachdem das nervt
habe ich mit Strace nachgeforscht und herausgefunden das die Apps blocken da
angeblich zu viele Files offen sind. Beim letzten mal waren 402884 files
geöffnet.

Schließt man nun ein Programm, fällt man unter die 400000 und Dolphin und Co.
öffnen sich wieder. Mit strace sah man sehr schön die Meldung.
615/5000
use KDE Neon with Plasma 5.19.1 here. But I guess it's the same with Kubuntu.
For a few weeks, if not months, it has always happened that some KDEapps simply
do not open during operation. These knowingly include Dolphin, Kate, Kdevelop,
Systemsettings. After that annoying I did some research with Strace and found
that the apps are blocking because there are supposedly too many files open.
Last time there were 402884 files open.
If you now close a program, you fall under the 400,000 and Dolphin and Co. open
again. The message was very nice to see with strace.


To REPRODUCE you have to open many programs, or wait some hours with KDE
running. At some point, applications such as Dolphin, Kate, and Co. can no
longer be opened.

If i open dolphin at CMD with strace i found this error: 


...
inotify_init()                          = -1 EMFILE (Too many open files)
...
inotify_init1(IN_CLOEXEC)               = -1 EMFILE (Too many open files)
...

After closeing some Applications, Dolphin and other apps can be opened again.
So i set some higher limits for open Files in sysct.conf.
https://deepdoc.at/dokuwiki/doku.php?id=rund_um_den_desktop:kde-neon_empfohlene_limits_laut_ubuntu

But this was not the solution. This happens even with very low numbers of open
programs. So please check this. This is a really, really annoying bug.

Very Thanks and best Regards :) :)

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