sudo ./a.out config.conf
starting 3 worker thread(s)... done.
pausing mainthread..
nbdthread waiting for all workers (0/3) to be become ready. (this usually takes a long time - some problem @CAC login system)
worker #1 ready.
worker #3 ready.
worker #2 ready.
upload queue emptied.
all workers (3/3) ready, nbdthread starting NBD_DO_IT.
upload queue no longer empty! (62454)
response length: 0:
terminate called after throwing an instance of 'std::runtime_error'
  what():  upload response length was not 27 bytes long! something went wrong
./a.out(+0x5565)[0x56204f741565]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f3ec3334980]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f3ec29cefb7]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f3ec29d0921]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x8c957)[0x7f3ec3025957]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x92ae6)[0x7f3ec302bae6]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x92b21)[0x7f3ec302bb21]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x92d54)[0x7f3ec302bd54]
./a.out(+0xa23c)[0x56204f74623c]
./a.out(+0x125ed)[0x56204f74e5ed]
./a.out(+0x13019)[0x56204f74f019]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xbd6df)[0x7f3ec30566df]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76db)[0x7f3ec33296db]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x3f)[0x7f3ec2ab171f]
./a.out:src/main.cpp:1882: received shutdown signal 6 (Aborted) from PID 12300 / UID 0. shutting down..
: Too many open files
shutting down, cleaning up.. thread doing the cleanup: 139907424507648
request socket shutting down, worker exiting.
./a.out(+0x5565)[0x56204f741565]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f3ec3334980]
/lib/x86_64-linux-gnu/libpthread.so.0(__pthread_rwlock_rdlock+0x12)[0x7f3ec332e382]
/usr/lib/x86_64-linux-gnu/libcrypto.so.1.1(CRYPTO_THREAD_read_lock+0x9)[0x7f3ec1bab969]
/usr/lib/x86_64-linux-gnu/libcrypto.so.1.1(+0x157820)[0x7f3ec1b23820]
/usr/lib/x86_64-linux-gnu/libcrypto.so.1.1(ERR_lib_error_string+0x4e)[0x7f3ec1b23c0e]
/usr/lib/x86_64-linux-gnu/libcrypto.so.1.1(ERR_error_string_n+0x6d)[0x7f3ec1b23dfd]
/usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x5f853)[0x7f3ec35a0853]
/usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x62a0f)[0x7f3ec35a3a0f]
/usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x6385a)[0x7f3ec35a485a]
/usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x13042)[0x7f3ec3554042]
/usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x1f9b6)[0x7f3ec35609b6]
/usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x35626)[0x7f3ec3576626]
/usr/lib/x86_64-linux-gnu/libcurl.so.4(curl_multi_perform+0xb4)[0x7f3ec35775c4]
/usr/lib/x86_64-linux-gnu/libcurl.so.4(curl_easy_perform+0xf4)[0x7f3ec356d434]
./a.out(+0xa27f)[0x56204f74627f]
./a.out(+0xaf23)[0x56204f746f23]
./a.out(+0xccfd)[0x56204f748cfd]
./a.out(+0xce0d)[0x56204f748e0d]
./a.out(+0x14912)[0x56204f750912]
./a.out:src/main.cpp:1882: received shutdown signal 11 (Segmentation fault) from PID 24 / UID 0. shutting down..