[Akonadi] [Bug 422410] EWS resource uses 100% CPU when its target server becomes inaccessible
John Scott
bugzilla_noreply at kde.org
Tue Oct 6 18:49:36 BST 2020
https://bugs.kde.org/show_bug.cgi?id=422410
John Scott <jscott at posteo.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
CC| |jscott at posteo.net
Status|REPORTED |CONFIRMED
--- Comment #1 from John Scott <jscott at posteo.net> ---
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Hash: SHA256
I can reproduce this every time on Debian Bullseye if, for example, I
disconnect my computer from the Internet but don't tell KMail to 'Go Offline.'
Two processes seem to eat the CPU, and I don't know what their relation is:
akonadi_ews_res and http_so. Here's a crummy backtrace from when I stopped the
former:
#0 0x00007f894330f4bf in __GI___poll (fds=0x5614f8a31510, nfds=8, timeout=40)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007f893e859dce in g_main_context_poll
(priority=<optimized out>, n_fds=8, fds=0x5614f8a31510, timeout=<optimized
out>, context=0x7f8930005000) at ../../../glib/gmain.c:4395
#2 g_main_context_iterate (context=context at entry=0x7f8930005000,
block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>)
at ../../../glib/gmain.c:4087
#3 0x00007f893e859eef in g_main_context_iteration (context=0x7f8930005000,
may_block=may_block at entry=1) at ../../../glib/gmain.c:4157
#4 0x00007f89438bf31b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x5614f84d4be0, flags=...)
at kernel/qeventdispatcher_glib.cpp:425
#5 0x00007f89438684db in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this at entry=0x7ffc114e3b90, flags=...,
flags at entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:136
#6 0x00007f8943870782 in QCoreApplication::exec() () at
../../include/QtCore/../../src/corelib/global/qflags.h:118
#7 0x00007f894c80faae in Akonadi::ResourceBase::init(Akonadi::ResourceBase&)
() at /lib/x86_64-linux-gnu/libKF5AkonadiAgentBase.so.5
#8 0x00005614f6c2d1c3 in ()
#9 0x00007f8943242cca in __libc_start_main (main=0x5614f6bdaa10, argc=3,
argv=0x7ffc114e3e78, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffc114e3e68) at ../csu/libc-start.c:308
#10 0x00005614f6bdf33a in ()
and from the latter:
#0 0x00007f3da04c25b6 in __ppoll (fds=fds at entry=0x7ffec64504e8,
nfds=nfds at entry=1, timeout=<optimized out>, timeout at entry=0x7ffec6450480,
sigmask=sigmask at entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1 0x00007f3da08872a0 in ppoll (__ss=<optimized out>, __timeout=<optimized
out>, __nfds=<optimized out>, __fds=<optimized out>)
at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2 qt_ppoll (timeout_ts=0x7ffec6450480, nfds=1, fds=0x7ffec64504e8) at
kernel/qcore_unix.cpp:132
#3 qt_ppoll (timeout_ts=0x7ffec6450480, nfds=1, fds=0x7ffec64504e8) at
kernel/qcore_unix.cpp:129
#4 qt_safe_poll (fds=fds at entry=0x7ffec64504e8, nfds=nfds at entry=1,
timeout_ts=0x7ffec64504f0) at kernel/qcore_unix.cpp:164
#5 0x00007f3d9c5d27a2 in qt_poll_msecs (nfds=1, timeout=<optimized out>,
fds=0x7ffec64504e8)
at
../../include/QtCore/5.14.2/QtCore/private/../../../../../src/corelib/kernel/qcore_unix_p.h:381
#6 QNativeSocketEnginePrivate::nativeSelect (this=this at entry=0x56127de01fc0,
timeout=<optimized out>, checkRead=checkRead at entry=true,
checkWrite=checkWrite at entry=false,
selectForRead=selectForRead at entry=0x7ffec64505c6,
selectForWrite=0x7ffec64505c7)
at socket/qnativesocketengine_unix.cpp:1435
#7 0x00007f3d9c5d0271 in QNativeSocketEngine::waitForReadOrWrite
(this=0x56127de02b00, readyToRead=0x7ffec64505c6,
readyToWrite=<optimized out>, checkRead=<optimized out>,
checkWrite=<optimized out>, msecs=<optimized out>, timedOut=0x0)
at socket/qnativesocketengine.cpp:1120
#8 0x00007f3d9c5c37b6 in QAbstractSocket::waitForReadyRead
(this=0x56127de038c0, msecs=60000)
at
../../include/QtCore/5.14.2/QtCore/private/../../../../../src/corelib/tools/qringbuffer_p.h:218
#9 0x00007f3d9c7b90e8 in KIO::ConnectionBackend::waitForIncomingTask
(this=0x56127de05d90, ms=60000) at ./src/core/connectionbackend.cpp:168
#10 0x00007f3d9c7b9dc5 in KIO::Connection::waitForIncomingTask (this=<optimized
out>, ms=ms at entry=60000) at ./src/core/connection.cpp:204
#11 0x00007f3d9c814cdd in KIO::SlaveBase::dispatchLoop (this=0x7ffec6450730) at
./src/core/slavebase.cpp:328
#12 0x00007f3d9b01fda2 in kdemain () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/http.so
#13 0x000056127d771c5d in ?? ()
#14 0x000056127d772d4a in ?? ()
#15 0x000056127d77373a in ?? ()
#16 0x000056127d76e63f in ?? ()
#17 0x00007f3da03f5cca in __libc_start_main (main=0x56127d76dc70, argc=5,
argv=0x7ffec6451128, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffec6451118) at
../csu/libc-start.c:308
#18 0x000056127d76f2aa in ?? ()
I'll work on getting some better ones, but I'd appreciate tips like what
breakpoints to set. I don't remember which way it was but when debugging, if I
stopped one of the programs, a new process would spawn. That makes it tricky to
pin where the fault lies: akonadi_ews_res or http_so.
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