Still happens with F26:

kf5-akonadi-server.x86_64            17.04.1-3.fc26  @@commandline
kf5-akonadi-server-debuginfo.x86_64  17.04.1-3.fc26  @fedora-debuginfo
kf5-akonadi-server-mysql.x86_64      17.04.1-3.fc26  @@commandline

=====================================
Application: akonadi_control (akonadi_control), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9aa1f3bd40 (LWP 1805))]

Thread 2 (Thread 0x7f9a8d8db700 (LWP 1817)):
#0  0x00007f9aa0042a9d in poll () at /lib64/libc.so.6
#1  0x00007f9a9ad14c97 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f9a9ad16a8a in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f9a91f8cba9 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f9aa0c66c9e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f9a9fd2636d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f9aa004eb8f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f9aa1f3bd40 (LWP 1805)):
[KCrash Handler]
#6  0x00007f9a9ff7466b in raise () at /lib64/libc.so.6
#7  0x00007f9a9ff76470 in abort () at /lib64/libc.so.6
#8  0x00007f9aa0c55527 in  () at /lib64/libQt5Core.so.5
#9  0x00005608d8c387fa in akInit(QString const&) (appName=...) at /usr/src/debug/akonadi-17.04.1/src/shared/akdebug.cpp:195
#10 0x00005608d8c36822 in AkApplicationBase::init() (this=0x7ffc82c78a40) at /usr/src/debug/akonadi-17.04.1/src/shared/akapplication.cpp:61
#11 0x00005608d8c16b88 in AkApplicationImpl<QGuiApplication>::AkApplicationImpl(int&, char**, QLoggingCategory const&) (loggingCategory=..., argv=0x7ffc82c78ba8, argc=@0x7ffc82c789bc: 1, this=0x7ffc82c78a40) at /usr/src/debug/akonadi-17.04.1/src/shared/akapplication.h:83
#12 0x00005608d8c16b88 in main(int, char**) (argc=<optimized out>, argv=0x7ffc82c78ba8) at /usr/src/debug/akonadi-17.04.1/src/akonadicontrol/main.cpp:55

Still happens with F27.

akonadi.x86_64                         1.13.0-107.fc27   @fedora	 
akonadi-import-wizard.x86_64           17.08.1-1.fc27	 @fedora	 
kdepimlibs-akonadi.x86_64              4.14.10-22.fc27   @fedora	 
kf5-akonadi-calendar.x86_64            17.08.1-1.fc27	 @fedora	 
kf5-akonadi-contacts.x86_64            17.08.1-1.fc27	 @fedora	 
kf5-akonadi-mime.x86_64                17.08.1-1.fc27	 @fedora	 
kf5-akonadi-notes.x86_64               17.08.1-1.fc27	 @fedora	 
kf5-akonadi-search.x86_64              17.08.1-1.fc27	 @fedora	 
kf5-akonadi-server.x86_64              17.08.1-3.fc27	 @updates-testing
kf5-akonadi-server-debuginfo.x86_64    17.08.1-3.fc27	 @updates-testing-debuginfo
kf5-akonadi-server-debugsource.x86_64  17.08.1-3.fc27	 @updates-testing
kf5-akonadi-server-mysql.x86_64        17.08.1-3.fc27	 @updates-testing
kf5-kmailtransport-akonadi.x86_64      17.08.1-1.fc27	 @fedora	 
kf5-libkdepim-akonadi.x86_64           17.08.1-1.fc27	 @fedora	 
kf5-mailimporter-akonadi.x86_64        17.08.1-1.fc27	 @fedora	 
kf5-pimcommon-akonadi.x86_64           17.08.1-1.fc27	 @fedora	 

qt5-qtbase.x86_64                      5.9.2-1.fc27	 @updates-testing
qt5-qtbase-common.noarch               5.9.2-1.fc27	 @updates-testing
qt5-qtbase-debuginfo.x86_64            5.9.2-1.fc27	 @updates-testing-debuginfo
qt5-qtbase-debugsource.x86_64          5.9.2-1.fc27	 @updates-testing
qt5-qtbase-devel-debuginfo.x86_64      5.9.2-1.fc27	 @updates-testing-debuginfo
qt5-qtbase-gui.x86_64                  5.9.2-1.fc27	 @updates-testing
qt5-qtbase-gui-debuginfo.x86_64        5.9.2-1.fc27	 @updates-testing-debuginfo
qt5-qtbase-mysql.x86_64                5.9.2-1.fc27	 @updates-testing

==================================================================

Application: akonadi_control (akonadi_control), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f47cf097d40 (LWP 2121))]

Thread 2 (Thread 0x7f47bb482700 (LWP 2125)):
#0  0x00007f47cc9c0c0b in poll () from /lib64/libc.so.6
#1  0x00007f47c722bfe7 in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007f47c722ddda in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f47be0219c9 in QXcbEventReader::run() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007f47cd62b036 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f47cc69b609 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f47cc9cd1bf in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f47cf097d40 (LWP 2121)):
[KCrash Handler]
#6  0x00007f47cc8ea69b in raise () from /lib64/libc.so.6
#7  0x00007f47cc8ec3b1 in abort () from /lib64/libc.so.6
#8  0x00007f47cd619831 in QMessageLogger::fatal(char const*, ...) const () from /lib64/libQt5Core.so.5
#9  0x0000561c0cecec2a in akInit (appName=...) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akdebug.cpp:195
#10 0x0000561c0ceccc42 in AkApplicationBase::init (this=0x7ffee4979f90) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akapplication.cpp:61
#11 0x0000561c0ceac458 in AkApplicationImpl<QGuiApplication>::AkApplicationImpl (loggingCategory=..., argv=0x7ffee497a0f8, argc=@0x7ffee4979f0c: 1, this=0x7ffee4979f90) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akapplication.h:83
#12 main (argc=<optimized out>, argv=0x7ffee497a0f8) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/akonadicontrol/main.cpp:55

#8  0x00007f47cd619831 in QMessageLogger::fatal(char const*, ...) const () from /lib64/libQt5Core.so.5

This logged some potential extra information to your user log/journal, can you please try to find this snippet and post that here?

The crash happened again, the data is from this new crash.

I found a message which is there just when the crash occurs:
Oct 22 09:14:22 omega akonadi_control[2073]: Cannot remove old log file - running on a readonly filesystem maybe?

I am going to attach also the full journal/log.

Created attachment 1341750 [details]
Output from journalctl -b

The new crash report is similar/the same as the previous one:

Application: akonadi_control (akonadi_control), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc9cb46bd40 (LWP 2073))]

Thread 2 (Thread 0x7fc9b7856700 (LWP 2075)):
#0  0x00007fc9c8d948bb in poll () from /lib64/libc.so.6
#1  0x00007fc9c35fffe7 in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007fc9c3601dda in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007fc9ba3f59c9 in QXcbEventReader::run() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007fc9c99ff036 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007fc9c8a6f609 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fc9c8da0e6f in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fc9cb46bd40 (LWP 2073)):
[KCrash Handler]
#6  0x00007fc9c8cbe69b in raise () from /lib64/libc.so.6
#7  0x00007fc9c8cc03b1 in abort () from /lib64/libc.so.6
#8  0x00007fc9c99ed831 in QMessageLogger::fatal(char const*, ...) const () from /lib64/libQt5Core.so.5
#9  0x00005630e443fc2a in akInit (appName=...) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akdebug.cpp:195
#10 0x00005630e443dc42 in AkApplicationBase::init (this=0x7ffe1c47b850) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akapplication.cpp:61
#11 0x00005630e441d458 in AkApplicationImpl<QGuiApplication>::AkApplicationImpl (loggingCategory=..., argv=0x7ffe1c47b9b8, argc=@0x7ffe1c47b7cc: 1, this=0x7ffe1c47b850) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akapplication.h:83
#12 main (argc=<optimized out>, argv=0x7ffe1c47b9b8) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/akonadicontrol/main.cpp:55

I slowly learn how the debuginfo thingy works. Installed more related debuginfo files and got, hopefully, a better report.
Executable: akonadi_control PID: 2069 Signal: Aborted (6) Time: 10/22/17 15:20:19

The above mentioned message is still there:
Oct 22 15:20:16 omega akonadi_control[2069]: Cannot remove old log file - running on a readonly filesystem maybe?

There are no readonly filesystems (that I know of). I will attach the full journal/log.

============================================================
Application: akonadi_control (akonadi_control), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
27	  return SYSCALL_CANCEL (nanosleep, requested_time, remaining);
[Current thread is 1 (Thread 0x7f57f1680d40 (LWP 2069))]

Thread 2 (Thread 0x7f57dda6b700 (LWP 2073)):
#0  0x00007f57eefa98bb in __GI___poll (fds=fds@entry=0x7f57dda6ac08, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f57e9814fe7 in poll (__timeout=-1, __nfds=1, __fds=0x7f57dda6ac08) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x562e8675a1c0, cond=cond@entry=0x562e8675a200, vector=vector@entry=0x0, count=count@entry=0x0) at xcb_conn.c:479
#3  0x00007f57e9816dda in xcb_wait_for_event (c=0x562e8675a1c0) at xcb_in.c:693
#4  0x00007f57e060a9c9 in QXcbEventReader::run() () from /lib64/libQt5XcbQpa.so.5
#5  0x00007f57efc14036 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#6  0x00007f57eec84609 in start_thread (arg=0x7f57dda6b700) at pthread_create.c:465
#7  0x00007f57eefb5e6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f57f1680d40 (LWP 2069)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f57eeed53b1 in __GI_abort () at abort.c:79
#8  0x00007f57efc02831 in QMessageLogger::fatal(char const*, ...) const () from /lib64/libQt5Core.so.5
#9  0x0000562e8473ac2a in akInit (appName=...) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akdebug.cpp:195
#10 0x0000562e84738c42 in AkApplicationBase::init (this=0x7ffc8535f6b0) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akapplication.cpp:61
#11 0x0000562e84718458 in AkApplicationImpl<QGuiApplication>::AkApplicationImpl (loggingCategory=..., argv=0x7ffc8535f818, argc=@0x7ffc8535f62c: 1, this=0x7ffc8535f6b0) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akapplication.h:83
#12 main (argc=<optimized out>, argv=0x7ffc8535f818) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/akonadicontrol/main.cpp:55

Created attachment 1341787 [details]
Output from journalctl -b

The qtbase debuginfo package got updated, it matches the qtbase version now.
The crash report seems more complete, it shows the "Cannot remove old log file - running on a readonly filesystem maybe?" message from the journal:
Nov 05 09:15:11 omega akonadi_control[2042]: Cannot remove old log file - running on a readonly filesystem maybe?

Executable: akonadi_control PID: 2042 Signal: Aborted (6) Time: 11/5/17 09:15:14

Application: akonadi_control (akonadi_control), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
27	  return SYSCALL_CANCEL (nanosleep, requested_time, remaining);
[Current thread is 1 (Thread 0x7f9b165bcd40 (LWP 2042))]

Thread 2 (Thread 0x7f9b02945700 (LWP 2059)):
#0  0x00007f9b13eb28bb in __GI___poll (fds=fds@entry=0x7f9b02944bf8, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f9b0e6f3fe7 in poll (__timeout=-1, __nfds=1, __fds=0x7f9b02944bf8) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x5632dc9911f0, cond=cond@entry=0x5632dc991230, vector=vector@entry=0x0, count=count@entry=0x0) at xcb_conn.c:479
#3  0x00007f9b0e6f5dda in xcb_wait_for_event (c=0x5632dc9911f0) at xcb_in.c:693
#4  0x00007f9b054e4929 in QXcbEventReader::run (this=0x5632dc990740) at qxcbconnection.cpp:1330
#5  0x00007f9b14b20b92 in QThreadPrivate::start (arg=0x5632dc990740) at thread/qthread_unix.cpp:368
#6  0x00007f9b13b8d609 in start_thread (arg=0x7f9b02945700) at pthread_create.c:465
#7  0x00007f9b13ebee6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f9b165bcd40 (LWP 2042)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f9b13dde3b1 in __GI_abort () at abort.c:79
#8  0x00007f9b14b0e637 in qt_message_fatal (context=..., message=<synthetic pointer>...) at global/qlogging.cpp:1690
#9  QMessageLogger::fatal (this=this@entry=0x7ffe74272450, msg=msg@entry=0x5632db5e6830 "Cannot remove old log file - running on a readonly filesystem maybe?") at global/qlogging.cpp:796
#10 0x00005632db5dcc2a in akInit (appName=...) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akdebug.cpp:195
#11 0x00005632db5dac42 in AkApplicationBase::init (this=0x7ffe742725f0) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akapplication.cpp:61
#12 0x00005632db5ba458 in AkApplicationImpl<QGuiApplication>::AkApplicationImpl (loggingCategory=..., argv=0x7ffe74272758, argc=@0x7ffe7427256c: 1, this=0x7ffe742725f0) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/shared/akapplication.h:83
#13 main (argc=<optimized out>, argv=0x7ffe74272758) at /usr/src/debug/kf5-akonadi-server-17.08.1-3.fc27.x86_64/src/akonadicontrol/main.cpp:55

So, apparently akonadi sees that there are existing log files at:
~/.local/share/akonadi/*.old
and/or
~/.local/share/akonadi/db_data/*.old

and hits an error trying to remove them.  Do any of those exist for you?  Can you try deleting them?

I am sorry for the late reply. I was travelling abroad.
The .old files were there. They were 'fresh' from the last startup. There was no indication showing why Akondi could not remove them (permissions, etc.).

$ ll ~/.local/share/akonadi/*.old
-rw-rw-r--. 1 tomasz tomasz 148 Nov 29 08:20 /home/tomasz/.local/share/akonadi/akonadi_control.error.old
-rw-rw-r--. 1 tomasz tomasz  32 Nov 29 08:20 /home/tomasz/.local/share/akonadi/akonadiserver.error.old

$ ll ~/.local/share/akonadi/db_data/*.old
-rw-rw-r--. 1 tomasz tomasz 17385157 Nov 29 08:20 /home/tomasz/.local/share/akonadi/db_data/mysql.err.old

I logged out and removed them. They were back after KDE startup. I looked into them and found message like 'Cannot connect to / initialize database'. 
I logged out again and renamed/removed all akonadi files:
ll -d ~/.*/*akonadi*
ll -d ~/.*/*/*akonadi*
ll -d ~/.*/*/*/*akonadi*
ll -d ~/.*/*/*/*/*akonadi*

It fixed the problem, even KAlarm started to work, first time since ~F24.
My problem is solved. Thanks for the help!

Unfortunately, the bug in Akonadi stays. The following is my opinion, please take it with a grain of salt. Why the so called 'modern desktop' data have to spread over so many places? What was wrong with the single ~/.akonadi directory approach?
We users learned to accept that things go wrong sometimes, and need to be fixed. But, is it not easier to rename/remove a single .akonadi directory, recover it from backups, compare with old ones, than do it on data spread through .config .kde .local/share and since the removal also in .cache?

The issue is back. However there is a slight difference in the logs, it says 'cannot rename' instead of 'cannot remove':

Dec 01 06:24:55 omega akonadi_control[2119]: Cannot rename log file - running on a readonly filesystem maybe?

$ ll ~/.local/share/akonadi/*.old ~/.local/share/akonadi/db_data/*.old
-rw-rw-r--. 1 tomasz tomasz    96 Dec  1 06:31 /home/tomasz/.local/share/akonadi/akonadi_control.error.old
-rw-rw-r--. 1 tomasz tomasz   102 Dec  1 06:25 /home/tomasz/.local/share/akonadi/akonadiserver.error.old
-rw-rw-r--. 1 tomasz tomasz 16197 Dec  1 06:25 /home/tomasz/.local/share/akonadi/db_data/mysql.err.old

Any thoughts? 

======================================================
Executable: akonadi_control PID: 2119 Signal: Aborted (6) Time: 12/1/17 06:24:56

Application: akonadi_control (akonadi_control), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
27        return SYSCALL_CANCEL (nanosleep, requested_time, remaining);
[Current thread is 1 (Thread 0x7f1896f8ed40 (LWP 2119))]

Thread 2 (Thread 0x7f1883317700 (LWP 2122)):
#0  0x00007f18948838bb in __GI___poll (fds=fds@entry=0x7f1883316bf8, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f188f0c4fe7 in poll (__timeout=-1, __nfds=1, __fds=0x7f1883316bf8) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x563d6cd7d280, cond=cond@entry=0x563d6cd7d2c0, vector=vector@entry=0x0, count=count@entry=0x0) at xcb_conn.c:479
#3  0x00007f188f0c6dda in xcb_wait_for_event (c=0x563d6cd7d280) at xcb_in.c:693
#4  0x00007f1885eb5a49 in QXcbEventReader::run (this=0x563d6cd7c7d0) at qxcbconnection.cpp:1335
#5  0x00007f18954f1b92 in QThreadPrivate::start (arg=0x563d6cd7c7d0) at thread/qthread_unix.cpp:368
#6  0x00007f189455e609 in start_thread (arg=0x7f1883317700) at pthread_create.c:465
#7  0x00007f189488fe6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f1896f8ed40 (LWP 2119)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f18947af3b1 in __GI_abort () at abort.c:79
#8  0x00007f18954df637 in qt_message_fatal (context=..., message=<synthetic pointer>...) at global/qlogging.cpp:1690
#9  QMessageLogger::fatal (this=this@entry=0x7fff2b4c1690, msg=msg@entry=0x563d6be7f878 "Cannot rename log file - running on a readonly filesystem maybe?") at global/qlogging.cpp:796
#10 0x0000563d6be75c62 in akInit (appName=...) at /usr/src/debug/kf5-akonadi-server-17.08.3-1.fc27.x86_64/src/shared/akdebug.cpp:203
#11 0x0000563d6be73c42 in AkApplicationBase::init (this=0x7fff2b4c1830) at /usr/src/debug/kf5-akonadi-server-17.08.3-1.fc27.x86_64/src/shared/akapplication.cpp:61
#12 0x0000563d6be53458 in AkApplicationImpl<QGuiApplication>::AkApplicationImpl (loggingCategory=..., argv=0x7fff2b4c1998, argc=@0x7fff2b4c17ac: 1, this=0x7fff2b4c1830) at /usr/src/debug/kf5-akonadi-server-17.08.3-1.fc27.x86_64/src/shared/akapplication.h:83
#13 main (argc=<optimized out>, argv=0x7fff2b4c1998) at /usr/src/debug/kf5-akonadi-server-17.08.3-1.fc27.x86_64/src/akonadicontrol/main.cpp:55

Still happens after upgrade to F28.

akonadi.x86_64                           1.13.0-109.fc28    @fedora 
akonadi-import-wizard.x86_64             17.12.3-1.fc28     @fedora 
kdepimlibs-akonadi.x86_64                4.14.10-26.fc28    @fedora 
kf5-akonadi-calendar.x86_64              17.12.3-1.fc28     @fedora 
kf5-akonadi-contacts.x86_64              17.12.3-1.fc28     @fedora 
kf5-akonadi-mime.x86_64                  17.12.3-1.fc28     @fedora 
kf5-akonadi-notes.x86_64                 17.12.3-1.fc28     @fedora 
kf5-akonadi-search.x86_64                17.12.3-1.fc28     @fedora 
kf5-akonadi-server.x86_64                17.12.3-1.fc28     @fedora 
kf5-akonadi-server-debuginfo.x86_64      17.12.3-1.fc28     @fedora-debuginfo
kf5-akonadi-server-debugsource.x86_64    17.12.3-1.fc28     @fedora-debuginfo
kf5-akonadi-server-mysql.x86_64          17.12.3-1.fc28     @fedora 
kf5-kmailtransport-akonadi.x86_64        17.12.3-1.fc28     @fedora 
kf5-libkdepim-akonadi.x86_64             17.12.3-1.fc28     @fedora 
kf5-mailimporter-akonadi.x86_64          17.12.3-1.fc28     @fedora 
kf5-pimcommon-akonadi.x86_64             17.12.3-1.fc28     @fedora 


Executable: akonadi_control PID: 1970 Signal: Aborted (6) Time: 4/30/18 15:39:13

Application: akonadi_control (akonadi_control), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
28        return SYSCALL_CANCEL (nanosleep, requested_time, remaining);
[Current thread is 1 (Thread 0x7f8c71a80940 (LWP 1970))]

Thread 2 (Thread 0x7f8c5e376700 (LWP 1980)):
#0  0x00007f8c6f9d3929 in __GI___poll (fds=fds@entry=0x7f8c5e375b78, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8c6a45304f in poll (__timeout=-1, __nfds=1, __fds=0x7f8c5e375b78) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait () at xcb_conn.c:479
#3  0x00007f8c6a454caa in xcb_wait_for_event (c=0x55a820ce73c0) at xcb_in.c:697
#4  0x00007f8c60d244d9 in QXcbEventReader::run (this=0x55a820ce6ef0) at qxcbconnection.h:409
#5  0x00007f8c706a111d in QThreadPrivate::start(void*) () at thread/qthread_unix.cpp:376
#6  0x00007f8c6f6cc564 in start_thread (arg=<optimized out>) at pthread_create.c:463
#7  0x00007f8c6f9de31f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f8c71a80940 (LWP 1970)):
[KCrash Handler]


#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007f8c6f905591 in __GI_abort () at abort.c:79
#8  0x00007f8c70667ea3 in qt_message_fatal (context=..., message=<synthetic pointer>...) at global/qlogging.cpp:1716
#9  QMessageLogger::fatal (this=this@entry=0x7fff251ade80, msg=msg@entry=0x55a82033e118 "Cannot rename log file - running on a readonly filesystem maybe?") at global/qlogging.cpp:822
#10 0x000055a820334339 in akInit(QString const&) () at /usr/src/debug/kf5-akonadi-server-17.12.3-1.fc28.x86_64/src/shared/akdebug.cpp:203
#11 0x000055a8203323a6 in AkApplicationBase::init() () at /usr/include/qt5/QtCore/qstring.h:558
#12 0x000055a82030af5c in AkApplicationImpl<QGuiApplication>::AkApplicationImpl (loggingCategory=..., argv=0x7fff251ae188, argc=@0x7fff251adf9c: 1, this=0x7fff251ae020) at /usr/src/debug/kf5-akonadi-server-17.12.3-1.fc28.x86_64/src/akonadicontrol/main.cpp:55
#13 main () at /usr/src/debug/kf5-akonadi-server-17.12.3-1.fc28.x86_64/src/akonadicontrol/main.cpp:55
#14 0x00007f8c6f9071bb in __libc_start_main (main=0x55a82030aec0 <main>, argc=1, argv=0x7fff251ae188, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff251ae178) at ../csu/libc-start.c:308
#15 0x000055a82030b6ca in _start () at /usr/include/qt5/QtCore/qloggingcategory.h:71

#9  QMessageLogger::fatal (this=this@entry=0x7fff251ade80, msg=msg@entry=0x55a82033e118 "Cannot rename log file - running on a readonly filesystem maybe?") at global/qlogging.cpp:822

Same mysql problem as before, mysql is failing, it cannot rename the mysql log file (for some reason).

Fwiw, the akonadi code in question here is fairly straight-forward, I've no idea why your filesystem does not permit deletion/renaming sometimes:

    const QString name = QFileInfo(appName).fileName();
    const auto errorLogFile = DebugPrivate::errorLogFileName(name);
    QFileInfo infoOld(errorLogFile + QLatin1String(".old"));
    if (infoOld.exists()) {
        QFile fileOld(infoOld.absoluteFilePath());
        const bool success = fileOld.remove();
        if (!success) {
            qFatal("Cannot remove old log file - running on a readonly filesystem maybe?");
        }
    }

    QFileInfo info(errorLogFile);
    if (info.exists()) {
        QFile file(info.absoluteFilePath());
        const bool success = file.copy(errorLogFile + QLatin1String(".old"));
        if (!success) {
            qFatal("Cannot rename log file - running on a readonly filesystem maybe?");
        }
    }


I found upstream bug #392092 , so seems you're not the only one. :(

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Still present in F30:
kf5-akonadi-server.x86_64  18.12.2-2.fc30  @fedora

Executable: akonadi_control PID: 2109 Signal: Aborted (6) Time: 5/5/19 09:16:42
Application: akonadi_control (akonadi_control), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
29	  return SYSCALL_CANCEL (poll, fds, nfds, timeout);
[Current thread is 1 (Thread 0x7f6c840b5800 (LWP 2109))]

Thread 2 (Thread 0x7f6c76dc5700 (LWP 2113)):
#0  0x00007f6c872e72b7 in __GI___poll (fds=0x7f6c76dc4cb8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6c85ed638a in ?? () from /lib64/libxcb.so.1
#2  0x00007f6c85ed7ffa in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f6c76fc7918 in QXcbEventQueue::run (this=0x55dbef0c04a0) at qxcbeventqueue.cpp:228
#4  0x00007f6c8768b8a6 in QThreadPrivate::start (arg=0x55dbef0c04a0) at thread/qthread_unix.cpp:361
#5  0x00007f6c871de5a2 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f6c872f2023 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f6c840b5800 (LWP 2109)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007f6c87219895 in __GI_abort () at abort.c:79
#8  0x00007f6c87655af5 in qt_message_fatal (context=..., message=<synthetic pointer>...) at global/qlogging.cpp:1901
#9  QMessageLogger::fatal (this=this@entry=0x7ffe43400970, msg=msg@entry=0x55dbedbe0a98 "Cannot remove old log file '%s': %s") at global/qlogging.cpp:887
#10 0x000055dbedbae067 in akInit (appName=...) at /usr/include/qt5/QtCore/qarraydata.h:208
#11 0x000055dbedbd2b3b in AkApplicationBase::init (this=this@entry=0x7ffe43400b20) at /usr/include/qt5/QtCore/qstring.h:829
#12 0x000055dbedbae36f in AkApplicationImpl<QGuiApplication>::AkApplicationImpl (loggingCategory=..., argv=0x7ffe43400c88, argc=@0x7ffe43400a9c: 1, this=0x7ffe43400b20) at /usr/include/qt5/QtCore/qscopedpointer.h:52
#13 main (argc=<optimized out>, argv=0x7ffe43400c88) at /usr/src/debug/kf5-akonadi-server-18.12.2-2.fc30.x86_64/src/akonadicontrol/main.cpp:55
[Inferior 1 (process 2109) detached]

#8  0x00007f6c87655af5 in qt_message_fatal (context=..., message=<synthetic pointer>...) at global/qlogging.cpp:1901\

It added a log entry related to this crash, can you provide fresh logs?

Though ideally, this would be best reported upstream at bugs.kde.org , we in fedora have little resources to debug/fix issues of this sort ourselves without upstream collaboration (and particularly if we cannot reproduce the problem ourselves).

thanks.

Created attachment 1565281 [details]
Output of journalctl -b

I also found the following logs in my home.

.local/share/akonadi/akonadi_control.error:
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)

.local/share/akonadi/akonadi_control.error.old:
Unable to register service as "org.freedesktop.Akonadi.Control.lock" Maybe it's already running?

.local/share/akonadi/akonadiserver.error:
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)

.local/share/akonadi/akonadiserver.error.old:
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)

Please let me know, if there are other relevant logs that I can provide.

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Fedora will stop maintaining and issuing updates for Fedora 30 on 2020-05-26.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
Fedora 'version' of '30'.

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plan to fix it in a currently maintained version, simply change the 'version' 
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