QNAM: Download failures after socket get's reused

 QIODevice::Write: device not open

#6  0x00000000011951f1 in qt_message (buf=..., ap=0x7fffe0b2d508, msg=0x177f690 "QIODevice::write: device not open", 
    context=..., msgType=QtWarningMsg) at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/global/qlogging.cpp:231
#7  QMessageLogger::warning (this=0x7fffe0b2d600, msg=msg@entry=0x177f690 "QIODevice::write: device not open")
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/global/qlogging.cpp:396
#8  0x00000000012f551e in QIODevice::write (this=0x7fffcc23b6d0, data=<optimized out>, maxSize=<optimized out>)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/io/qiodevice.cpp:1303
#9  0x0000000000cd6f0f in QSslSocketBackendPrivate::transmit (this=0x7fffcc190510)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/network/ssl/qsslsocket_openssl.cpp:862
#10 0x0000000000cd643b in QSslSocketBackendPrivate::startClientEncryption (this=0x7fffcc190510)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/network/ssl/qsslsocket_openssl.cpp:769
#11 0x0000000000cc45e0 in QSslSocket::startClientEncryption (this=this@entry=0x7fffcc23bf50)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/network/ssl/qsslsocket.cpp:1729
#12 0x0000000000cc50b8 in QSslSocketPrivate::_q_connectedSlot (this=0x7fffcc190510)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/network/ssl/qsslsocket.cpp:2236
#13 0x0000000000ccab79 in QSslSocket::qt_static_metacall (_o=0x5ca1, _c=23740, _id=6, _a=0xffffffffffffffff)
    at .moc/moc_qsslsocket.cpp:152
#14 0x00000000013d47ea in QMetaObject::activate (sender=sender@entry=0x7fffcc23b6d0, signalOffset=<optimized out>, 
    local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/kernel/qobject.cpp:3717
#15 0x00000000013d4ed7 in QMetaObject::activate (sender=sender@entry=0x7fffcc23b6d0, 
    m=m@entry=0x1dab620 <QAbstractSocket::staticMetaObject>, local_signal_index=local_signal_index@entry=1, 
    argv=argv@entry=0x0) at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/kernel/qobject.cpp:3582
#16 0x0000000000cabf6a in connected (this=<optimized out>) at .moc/moc_qabstractsocket.cpp:366
#17 QAbstractSocketPrivate::fetchConnectionParameters (this=this@entry=0x7fffcc190940)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/network/socket/qabstractsocket.cpp:1326
#18 0x0000000000caea48 in QAbstractSocketPrivate::_q_testConnection (this=0x7fffcc190940)
---Type <return> to continue, or q <return> to quit---c
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/network/socket/qabstractsocket.cpp:1185
#19 0x0000000000cb76cd in QWriteNotifier::event (this=0x7fffcc0ad180, e=<optimized out>)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/network/socket/qnativesocketengine.cpp:1164
#20 0x000000000068983c in QApplicationPrivate::notify_helper (this=0x1de5da0, receiver=0x7fffcc0ad180, e=0x7fffe0b2ebe0)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/widgets/kernel/qapplication.cpp:3720
#21 0x000000000068e8b0 in QApplication::notify (this=0x7fffffffdd10, receiver=0x7fffcc0ad180, e=0x7fffe0b2ebe0)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/widgets/kernel/qapplication.cpp:3503
#22 0x0000000000425509 in SDKApp<QApplication>::notify (this=<optimized out>, receiver=<optimized out>, 
    event=<optimized out>) at ../../../src/src/sdk/sdkapp.h:66
#23 0x00000000013a5bfb in QCoreApplication::notifyInternal (this=0x7fffffffdd10, receiver=0x7fffcc0ad180, 
    event=event@entry=0x7fffe0b2ebe0) at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/kernel/qcoreapplication.cpp:935
#24 0x00000000013f4f8f in sendEvent (event=0x7fffe0b2ebe0, receiver=<optimized out>)
    at ../../include/QtCore/../../../../src/qtbase/src/corelib/kernel/qcoreapplication.h:228
#25 QEventDispatcherUNIX::activateSocketNotifiers (this=this@entry=0x7fffcc19d140)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:565
#26 0x00000000013f5478 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7fffcc0f80d0, flags=..., 
    flags@entry=..., timeout=timeout@entry=0x7fffe0b2ed50)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:264
#27 0x00000000013f58e1 in QEventDispatcherUNIX::processEvents (this=0x7fffcc19d140, flags=...)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:607
#28 0x00000000013a3609 in processEvents (flags=..., this=0x7fffe0b2ee10)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/kernel/qeventloop.cpp:128
#29 QEventLoop::exec (this=this@entry=0x7fffe0b2ee10, flags=..., flags@entry=...)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/kernel/qeventloop.cpp:204
#30 0x00000000011a50d4 in exec (this=<optimized out>)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/thread/qthread.cpp:503
#31 QThread::run (this=<optimized out>) at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/thread/qthread.cpp:570
#32 0x00000000011aa62f in QThreadPrivate::start (arg=0x7fffd808dd10)
    at /home/kakoehne/dev/qt/5.4/src/qtbase/src/corelib/thread/qthread_unix.cpp:337
#33 0x00000035650079d1 in start_thread () from /lib64/libpthread.so.0
#34 0x0000003564ce88fd in clone () from /lib64/libc.so.6