Task was destroyed but it is pending!

[cbrauckmiller]

I'm new to PyShark and having a problem that someone probably knows the answer to.

I'm looping through a PCAPNG and copying a DTLS sequence number to a list for further analysis.

The issue I have is that after a few seconds, the script stops and python throws this error:

Task was destroyed but it is pending!
task: <Task pending name='Task-15746' coro=<Capture.close_async() running at C:\Users\craig\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\pyshark\capture\capture.py:463>>
C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.2800.0_x64__qbz5n2kfra8p0\lib\asyncio\base_events.py:641: RuntimeWarning: coroutine 'Capture.close_async' was never awaited

Is this a bug in PyShark or something I'm doing wrong?

Thanks in advance.

[KimiNewt]

I believe that error is actually with it failing to close after another error has occurred, so the real issue is beforehand.
Can you:
a. Make sure it doesn't actually finish the task before crashing
b. Run your capture with debug=True and see if anything else shows up

[cbrauckmiller]

Hi there! Thanks for the quick reply.

Just so you know, my code is pretty basic. See below:

`import pyshark

capture = pyshark.FileCapture('socket.pcapng',display_filter="dtls")

# dtls = p.dtls.record_sequence_number
# src_ip = p.ip.src
# dst_ip = p.ip.dst
# src_port = p.udp.srcport
# dst_port = p.udp.dstport
# print(src_ip,':',src_port,'  to ',dst_ip,':',dst_port,' on sequence number',dtls)
#src_port = p.tcp.src
#print(src_ip,dtls)

socket_to_pop = []
pop_to_socket = []

for p in capture:
src_ip = p.ip.src
dst_ip = p.ip.dst
src_port = p.udp.srcport
dst_port = p.udp.dstport
dtls_seq_num = p.dtls.record_sequence_number

if src_ip == '75.144.155.29' and dst_ip == '149.20.200.62' and dst_port == '443':
    socket_to_pop.append(int(dtls_seq_num))

print(socket_to_pop)

`

I will look to see how to enable debug. I assume this is one of the option parameters?

[cbrauckmiller]

I'm not sure why the page is showing no indents in my code, but they are there :)

[cbrauckmiller]

When I added the capture.set_debug() to my code just below the 'capture = pyshark....' line, I get this output.

G:\Mac Files On G>python3 shark.py
2022-06-12 09:50:01,295 - FileCapture - DEBUG - Creating TShark subprocess with parameters: C:/Program Files/Wireshark/tshark.exe -l -n -T pdml -Y dtls -r socket.pcapng
2022-06-12 09:50:01,295 - FileCapture - DEBUG - Executable: C:/Program Files/Wireshark/tshark.exe
2022-06-12 09:50:01,303 - FileCapture - DEBUG - TShark subprocess (pid 2648) created
2022-06-12 09:50:13,069 - FileCapture - DEBUG - EOF reached (sync)
2022-06-12 09:50:13,069 - FileCapture - DEBUG - Cleanup Subprocess (pid 2648)
[31379384, 31379385, 31379386, 31379387, 31379388, 31379389, 31379390, 31379391, 31379392, 31379393, 31379394, 31379395, 31379396, 31379397, 31379398, 31379399, 31379400, 31379401, 31379402, 31379403, 31379404, 31379405, 31379406, 31379407, 31379408, 31379409, 31379410, 31379411, 31379412, 31379413, 31379414, 31379415, 31379416, 31379417, 31379418, 31379419, 31379420, 31379421, 31379422, 31379423, 31379424, 31379425, 31379426, 31379427, 31379428, 31379429, 31379430, 31379431, 31379432, 31379433, 31379434, 31379435, 31379436, 31379437, 31379438, 31379439, 31379440, 31379441, 31379442, 31379443, 31379444, 31379445, 31379446, 31379447, 31379448, 31379449, 31379450, 31379451, 31379452, 31379453, 31379454, 31379455, 31379456, 31379457, 31379458, 31379459, 31379460, 31379461, 31379462, 31379463, 31379464, 31379465, 31379466, 31379467, 31379468, 31379469, 31379470, 31379471, 31379472, 31379473, 31379474, 31379475, 31379476, 31379477, 31379478, 31379479, 31379480, 31379481, 31379482, 31379483, 31379484, 31379485, 31379486, 31379487, 31379488, 31379489, 31379490, 31379491, 31379492, 31379493, 31379494, 31379495, 31379496, 31379497, 31379498, 31379499, 31379500, 31379501, 31379502, 31379503, 31379504, 31379505, 31379506, 31379507, 31379508, 31379509, 31379510, 31379511, 31379512, 31379513, 31379514, 31379515, 31379516, 31379517, 31379518, 31379519, 31379520, 31379521, 31379522, 31379523, 31379524, 31379525, 31379526, 31379527, 31379528, 31379529, 31379530, 31379531, 31379532, 31379533, 31379534, 31379535, 31379536, 31379537, 31379538, 31379539, 31379540, 31379541, 31379542, 31379543, 31379544, 31379545, 31379546, 31379547, 31379548, 31379549, 31379550, 31379551, 31379552, 31379553, 31379554, 31379555, 31379556, 31379557, 31379558, 31379559, 31379560, 31379561, 31379562, 31379563, 31379564, 31379565, 31379566, 31379567, 31379568, 31379569, 31379570, 31379571, 31379572, 31379573, 31379574, 31379575, 31379576, 31379577, 31379578, 31379579, 31379580, 31379581, 31379582, 31379583, 31379584, 31379585, 31379586, 31379587, 31379588, 31379589, 31379590, 31379591, 31379592, 31379593, 31379594, 31379595, 31379596, 31379597, 31379598, 31379599, 31379600, 31379601, 31379602, 31379603, 31379604, 31379605, 31379606, 31379607, 31379608, 31379609, 31379610, 31379611, 31379612, 31379613, 31379614, 31379615, 31379616, 31379617, 31379618, 31379619, 31379620, 31379621, 31379622, 31379623, 31379624, 31379625, 31379626, 31379627, 31379628, 31379629, 31379630, 31379631, 31379632, 31379633, 31379634, 31379635, 31379636, 31379637, 31379638, 31379639, 31379640, 31379641, 31379642, 31379643, 31379644, 31379645, 31379646, 31379647, 31379648, 31379649, 31379650, 31379651, 31379652, 31379653, 31379654, 31379655, 31379656, 31379657, 31379658, 31379659, 31379660, 31379661, 31379662, 31379663, 31379664, 31379665, 31379666, 31379667, 31379668, 31379669, 31379670, 31379671, 31379672, 31379673, 31379674, 31379675, 31379676, 31379677, 31379678, 31379679, 31379680, 31379681, 31379682, 31379683, 31379684, 31379685, 31379686, 31379687, 31379688, 31379689, 31379690, 31379691, 31379692, 31379693, 31379694, 31379695, 31379696, 31379697, 31379698, 31379699, 31379700, 31379701, 31379702, 31379703, 31379704, 31379705, 31379706, 31379707, 31379708, 31379709, 31379710, 31379711, 31379712, 31379713, 31379714, 31379715, 31379716, 31379717, 31379718, 31379719, 31379720, 31379721, 31379722, 31379723, 31379724, 31379725, 31379726, 31379727, 31379728, 31379729, 31379730, 31379731, 31379732, 31379733, 31379734, 31379735, 31379736, 31379737, 31379738, 31379739, 31379740, 31379741, 31379742, 31379743, 31379744, 31379745, 31379746, 31379747, 31379748, 31379749, 31379750, 31379751, 31379752, 31379753, 31379754, 31379755, 31379756, 31379757, 31379758, 31379759, 31379760, 31379761, 31379762, 31379763, 31379764, 31379765, 31379766, 31379767, 31379768, 31379769, 31379770, 31379771, 31379772, 31379773, 31379774, 31379775, 31379776, 31379777, 31379778, 31379779, 31379780, 31379781, 31379782, 31379783, 31379784, 31379785, 31379786, 31379787, 31379788, 31379789, 31379790, 31379791, 31379792, 31379793, 31379794, 31379795, 31379796, 31379797, 31379798, 31379799, 31379800, 31379801, 31379802, 31379803, 31379804, 31379805, 31379806, 31379807, 31379808, 31379809, 31379810, 31379811, 31379812, 31379813, 31379814, 31379815, 31379816, 31379817, 31379818, 31379819, 31379820, 31379821, 31379822, 31379823, 31379824, 31379825, 31379826, 31379827, 31379828, 31379829, 31379830, 31379831, 31379832, 31379833, 31379834, 31379835, 31379836, 31379837, 31379838, 31379839, 31379840, 31379841, 31379842, 31379843, 31379844, 31379845, 31379846, 31379847, 31379848, 31379849, 31379850, 31379851, 31379852, 31379853, 31379854, 31379855, 31379856, 31379857, 31379858, 31379859, 31379860, 31379861, 31379862, 31379863, 31379864, 31379865, 31379866, 31379867, 31379868, 31379869, 31379870, 31379871, 31379872, 31379873, 31379874, 31379875, 31379876, 31379877, 31379878, 31379879, 31379880, 31379881, 31379882, 31379883, 31379884, 31379885, 31379886, 31379887, 31379888, 31379889, 31379890, 31379891, 31379892, 31379893, 31379894, 31379895, 31379896, 31379897, 31379898, 31379899, 31379900, 31379901, 31379902, 31379903, 31379904, 31379905, 31379906, 31379907, 31379908, 31379909, 31379910, 31379911, 31379912, 31379913, 31379914, 31379915, 31379916, 31379917, 31379918, 31379919, 31379920, 31379921, 31379922, 31379923, 31379924, 31379925, 31379926, 31379927, 31379928, 31379929, 31379930, 31379931, 31379932, 31379933, 31379934, 31379935, 31379936, 31379937, 31379938, 31379939, 31379940, 31379941, 31379942, 31379943, 31379944, 31379945, 31379946, 31379947, 31379948, 31379949, 31379950, 31379951, 31379952, 31379953, 31379954, 31379955, 31379956, 31379957, 31379958, 31379959, 31379960, 31379961, 31379962, 31379963, 31379964, 31379965, 31379966, 31379967, 31379968, 31379969, 31379970, 31379971, 31379972, 31379973, 31379974, 31379975, 31379976, 31379977, 31379978, 31379979, 31379980, 31379981, 31379982, 31379983, 31379984, 31379985, 31379986, 31379987, 31379988, 31379989, 31379990, 31379991, 31379992, 31379993, 31379994, 31379995, 31379996, 31379997, 31379998, 31379999, 31380000, 31380001, 31380002, 31380003, 31380004, 31380005, 31380006, 31380007, 31380008, 31380009, 31380010, 31380011, 31380012, 31380013, 31380014, 31380015, 31380016, 31380017, 31380018, 31380019, 31380020, 31380021, 31380022, 31380023, 31380024, 31380025, 31380026, 31380027, 31380028, 31380029, 31380030, 31380031, 31380032, 31380033, 31380034, 31380035, 31380036, 31380037, 31380038, 31380039, 31380040, 31380041, 31380042, 31380043, 31380044, 31380045, 31380046, 31380047, 31380048, 31380049, 31380050, 31380051, 31380052, 31380053, 31380054, 31380055, 31380056, 31380057, 31380058, 31380059, 31380060, 31380061, 31380062, 31380063, 31380064, 31380065, 31380066, 31380067, 31380068, 31380069, 31380070, 31380071, 31380072, 31380073, 31380074, 31380075, 31380076, 31380077, 31380078, 31380079, 31380080, 31380081, 31380082, 31380083, 31380084, 31380085, 31380086, 31380087, 31380088, 31380089, 31380090, 31380091, 31380092, 31380093, 31380094, 31380095, 31380096, 31380097, 31380098, 31380099, 31380100, 31380101, 31380102, 31380103, 31380104, 31380105, 31380106, 31380107, 31380108, 31380109, 31380110, 31380111, 31380112, 31380113, 31380114, 31380115, 31380116, 31380117, 31380118, 31380119, 31380120, 31380121, 31380122, 31380123, 31380124, 31380125, 31380126, 31380127, 31380128, 31380129, 31380130, 31380131, 31380132, 31380133, 31380134, 31380135, 31380136, 31380137, 31380138, 31380139, 31380140, 31380141, 31380142, 31380143, 31380144, 31380145, 31380146, 31380147, 31380148, 31380149, 31380150, 31380151, 31380152, 31380153, 31380154, 31380155, 31380156, 31380157, 31380158, 31380159, 31380160, 31380161, 31380162, 31380163, 31380164, 31380165, 31380166, 31380167, 31380168, 31380169, 31380170, 31380171, 31380172, 31380173, 31380174, 31380175, 31380176, 31380177, 31380178, 31380179, 31380180, 31380181, 31380182, 31380183, 31380184, 31380185, 31380186, 31380187, 31380188, 31380189, 31380190, 31380191, 31380192, 31380193, 31380194, 31380195, 31380196, 31380197, 31380198, 31380199, 31380200, 31380201, 31380202, 31380203, 31380204, 31380205, 31380206, 31380207, 31380208, 31380209, 31380210, 31380211, 31380212, 31380213, 31380214, 31380215, 31380216, 31380217, 31380218, 31380219, 31380220, 31380221, 31380222, 31380223, 31380224, 31380225, 31380226, 31380227, 31380228, 31380229, 31380230, 31380231, 31380232, 31380233, 31380234, 31380235, 31380236, 31380237, 31380238, 31380239, 31380240, 31380241, 31380242, 31380243, 31380244, 31380245, 31380246, 31380247, 31380248, 31380249, 31380250, 31380251, 31380252, 31380253, 31380254, 31380255, 31380256, 31380257, 31380258, 31380259, 31380260, 31380261, 31380262, 31380263, 31380264, 31380265, 31380266, 31380267, 31380268, 31380269, 31380270, 31380271, 31380272, 31380273, 31380274, 31380275, 31380276, 31380277, 31380278, 31380279, 31380280, 31380281, 31380282, 31380283, 31380284, 31380285, 31380286, 31380287, 31380288, 31380289, 31380290, 31380291, 31380292, 31380293, 31380294, 31380295, 31380296, 31380297, 31380298, 31380299, 31380300, 31380301, 31380302, 31380303, 31380304, 31380305, 31380306, 31380307, 31380308, 31380309, 31380310, 31380311, 31380312, 31380313, 31380314, 31380315, 31380316, 31380317, 31380318, 31380319, 31380320, 31380321, 31380322, 31380323, 31380324, 31380325, 31380326, 31380327, 31380328, 31380329, 31380330, 31380331, 31380332, 31380333, 31380334, 31380335, 31380336, 31380337, 31380338, 31380339, 31380340, 31380341, 31380342, 31380343, 31380344, 31380345, 31380346, 31380347, 31380348, 31380349, 31380350, 31380351, 31380352, 31380353, 31380354, 31380355, 31380356, 31380357, 31380358, 31380359, 31380360, 31380361, 31380362, 31380363, 31380364, 31380365, 31380366, 31380367, 31380368, 31380369, 31380370, 31380371, 31380372, 31380373, 31380374, 31380375, 31380376, 31380377, 31380378, 31380379, 31380380, 31380381, 31380382, 31380383, 31380384, 31380385, 31380386, 31380387, 31380388, 31380389, 31380390, 31380391, 31380392, 31380393, 31380394, 31380395, 31380396, 31380397, 31380398, 31380399, 31380400, 31380401, 31380402, 31380403, 31380404, 31380405, 31380406, 31380407, 31380408, 31380409, 31380410, 31380411, 31380412, 31380413, 31380414, 31380415, 31380416, 31380417, 31380418, 31380419, 31380420, 31380421, 31380422, 31380423, 31380424, 31380425, 31380426, 31380427, 31380428, 31380429, 31380430, 31380431, 31380432, 31380433, 31380434, 31380435, 31380436, 31380437, 31380438, 31380439, 31380440, 31380441, 31380442, 31380443, 31380444, 31380445, 31380446, 31380447, 31380448, 31380449, 31380450, 31380451, 31380452, 31380453, 31380454, 31380455, 31380456, 31380457, 31380458, 31380459, 31380460, 31380461, 31380462, 31380463, 31380464, 31380465, 31380466, 31380467, 31380468, 31380469, 31380470, 31380471, 31380472, 31380473, 31380474, 31380475, 31380476, 31380477, 31380478, 31380479, 31380480, 31380481, 31380482, 31380483, 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Task was destroyed but it is pending!
task: <Task pending name='Task-15483' coro=<Capture.close_async() running at C:\Users\craig\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\pyshark\capture\capture.py:463>>
C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.2800.0_x64__qbz5n2kfra8p0\lib\asyncio\base_events.py:641: RuntimeWarning: coroutine 'Capture.close_async' was never awaited

The numbers are the DTLS sequence numbers. It's almost acting like tshark thinks the file is still open???
I don't know if this is accurate. Again, I'm very new to PyShark adn Python in general.

Thanks again for your time.
Is there a place where I can donate some $$ to the project?

[cbrauckmiller]

So here is what I've tried after posting:

1. Upgraded wireshark on Windows to 3.65
2. Verified that tshark is in the path even though it doesn't seem to be an issue
3. Upgraded to Python 3.10.5
   4.. Looked at the PCAP. I noticed that the list is actually completed with the last sequence number based on my if statement. The packet is next to the last packet in the PCAP. The last packet doesn't match my needs so, I don't do anything with it

I'll supply the pcapng as there is nothing really sensitive in it.
socket.pcapng.zip