(gdb) bt #0 0x00007f0e56221aa9 in QMutex::lockInline() (this=0x8) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:187 #1 0x00007f0e56221aa9 in QMutexLocker::QMutexLocker(QMutex*) (m=0x8, this=) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:109 #2 0x00007f0e56221aa9 in QAbstractSocketEngine::createSocketEngine(QAbstractSocket::SocketType, QNetworkProxy const&, QObject*) (socketType=QAbstractSocket::TcpSocket, proxy=..., parent=parent@entry=0x29dea08) at socket/qabstractsocketengine.cpp:110 #3 0x00007f0e5622dcd6 in QAbstractSocketPrivate::initSocketLayer(QAbstractSocket::NetworkLayerProtocol) (this=this@entry=0x2f363f0, protocol=QAbstractSocket::IPv4Protocol) at socket/qabstractsocket.cpp:552 #4 0x00007f0e5622f5f5 in QAbstractSocketPrivate::_q_connectToNextAddress() (this=this@entry=0x2f363f0) at socket/qabstractsocket.cpp:1000 #5 0x00007f0e5622fbdc in QAbstractSocketPrivate::_q_startConnecting(QHostInfo const&) (this=this@entry=0x2f363f0, hostInfo=...) at socket/qabstractsocket.cpp:937 #6 0x00007f0e56231dc9 in QAbstractSocket::connectToHostImplementation(QString const&, unsigned short, QFlags) (this=0x29dea08, hostName=..., port=, openMode=...) at socket/qabstractsocket.cpp:1401 #7 0x00007f0e56234d61 in QAbstractSocket::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=, _id=, _a=, _c=) at .moc/release-shared/moc_qabstractsocket.cpp:166 #8 0x00007f0e55e047bb in QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) const (this=this@entry=0x7f0db4f4e290, object=object@entry=0x29dea08, connectionType=connectionType@entry=Qt::DirectConnection, returnValue=..., val0=..., val1=..., val2=..., val3=..., val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:1664 #9 0x00007f0e55e05da2 in QMetaObject::invokeMethod(QObject*, char const*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) (obj=0x29dea08, member=member@entry=0x7f0e562642f4 "connectToHostImplementation", type=type@entry=Qt::DirectConnection, ret=..., val0=..., val1=..., val2=..., val3=..., val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:1179 #10 0x00007f0e5622d775 in QMetaObject::invokeMethod(QObject*, char const*, Qt::ConnectionType, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) (val9=..., val8=..., val7=..., val6=..., val5=..., val4=..., val3=..., val2=..., val1=..., val0=..., type=Qt::DirectConnection, member=0x7f0e562642f4 "connectToHostImplementation", obj=) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs.h:418 #11 0x00007f0e5622d775 in QAbstractSocket::connectToHost(QString const&, unsigned short, QFlags) (this=, hostName=..., port=, openMode=...) at socket/qabstractsocket.cpp:1328 #12 0x00000000004f19ea in RtspConnection::connectToHost(QUrl const&) () #13 0x00000000004fed8a in RtspConnectionManager::onTimer() () #14 0x0000000000567335 in RtspConnectionManager::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () #15 0x00007f0e55e14d41 in QObject::event(QEvent*) (this=0x5f3f010, e=) at kernel/qobject.cpp:1231 #16 0x00007f0e56684ebc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4 #17 0x00007f0e5668c017 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4 #18 0x00007f0e55dfacce in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffe8124f7a0, receiver=receiver@entry=0x5f3f010, event=event@entry=0x7f0d9c00f170) at kernel/qcoreapplication.cpp:955 #19 0x00007f0e55dfde9a in QCoreApplication::sendEvent(QObject*, QEvent*) (event=0x7f0d9c00f170, receiver=0x5f3f010) at kernel/qcoreapplication.h:231 #20 0x00007f0e55dfde9a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x2c6a0b0) at kernel/qcoreapplication.cpp:1579 #21 0x00007f0e55dfe283 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1472 #22 0x00007f0e55e2ac3e in QCoreApplication::sendPostedEvents() () at kernel/qcoreapplication.h:236 #23 0x00007f0e55e2ac3e in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x7f0d9c004ba0) at kernel/qeventdispatcher_glib.cpp:300 #24 0x00007f0e59d46e87 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0 #25 0x00007f0e59d47230 in () at /usr/lib64/libglib-2.0.so.0 #26 0x00007f0e59d472bc in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #27 0x00007f0e55e2ada6 in QEventDispatcherGlib::processEvents(QFlags) (this=0x7f0d9c000b10, flags=...) at kernel/qeventdispatcher_glib.cpp:450 #28 0x00007f0e55df9274 in QEventLoop::processEvents(QFlags) (this=this@entry=0x7f0db4f4ec40, flags=...) at kernel/qeventloop.cpp:149 #29 0x00007f0e55df95de in QEventLoop::exec(QFlags) (this=this@entry=0x7f0db4f4ec40, flags=...) at kernel/qeventloop.cpp:204 #30 0x00007f0e55cec4e6 in QThread::exec() (this=) at thread/qthread.cpp:538 #31 0x00007f0e55ceeda4 in QThreadPrivate::start(void*) (arg=0x2c69f50) at thread/qthread_unix.cpp:352 #32 0x00007f0e557c5569 in start_thread () at /lib64/libpthread.so.0 #33 0x00007f0e54c229ef in clone () at /lib64/libc.so.6 (gdb) info threads Id Target Id Frame * 1 Thread 0x7f0db4f4f700 (LWP 31501) QMutex::lockInline (this=0x8) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:187 2 Thread 0x7f0e43515700 (LWP 29533) 0x00007f0e557cb8ad in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 3 Thread 0x7f0e659a1e40 (LWP 29494) 0x00007f0e557cb8ad in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 4 Thread 0x7f0db5f51700 (LWP 31499) QList::append (this=this@entry=0x7f0db5f4feb0, t=...) at ../../include/QtCore/../../src/corelib/tools/qlist.h:507 5 Thread 0x7f0dbfedc700 (LWP 29546) 0x00007f0e557cb8ad in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 6 Thread 0x7f0d7c803700 (LWP 2855) 0x00007f0e54c18296 in ppoll () from /lib64/libc.so.6 7 Thread 0x7f0db6752700 (LWP 31498) QList::append (this=this@entry=0x7f0db6750eb0, t=...) at ../../include/QtCore/../../src/corelib/tools/qlist.h:507 8 Thread 0x7f0db5750700 (LWP 31500) QList::append (this=this@entry=0x7f0db574eeb0, t=...) at ../../include/QtCore/../../src/corelib/tools/qlist.h:507 9 Thread 0x7f0d7107e700 (LWP 15144) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 10 Thread 0x7f0da3fff700 (LWP 31502) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 11 Thread 0x7f0dbe32a700 (LWP 29552) 0x00007f0e54c1a013 in select () from /lib64/libc.so.6 12 Thread 0x7f0d7127f700 (LWP 15143) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 13 Thread 0x7f0da17fa700 (LWP 31507) 0x00007f0e557cb8ad in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 14 Thread 0x7f0da37fe700 (LWP 31503) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 15 Thread 0x7f0d73fff700 (LWP 2856) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 16 Thread 0x7f0da2ffd700 (LWP 31504) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 17 Thread 0x7f0d71b9b700 (LWP 15141) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 18 Thread 0x7f0da27fc700 (LWP 31505) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 19 Thread 0x7f0d70e7d700 (LWP 15145) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 20 Thread 0x7f0da1ffb700 (LWP 31506) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 21 Thread 0x7f0d737fe700 (LWP 2857) 0x00007f0e54c1a013 in select () from /lib64/libc.so.6 22 Thread 0x7f0d7f000700 (LWP 875) 0x00007f0e557cb8ad in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 23 Thread 0x7f0da0ff9700 (LWP 31512) 0x00007f0e54c1a013 in select () from /lib64/libc.so.6 24 Thread 0x7f0d7d004700 (LWP 1455) 0x00007f0e54c1819b in poll () from /lib64/libc.so.6 25 Thread 0x7f0d72ffd700 (LWP 2858) 0x00007f0e557cb8ad in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 (gdb)