Argus CaptureSession hangs on destruction when error occurs

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

Hi all,

Whenever an error occurs with processing frames during a CaptureSession, it stalls when it is being destructed.

I reproduced this problem by building the argus_userautoexposure sample and adding a timeout to the acquireFrame function: UniqueObj<Frame> frame(iFrameConsumer->acquireFrame(1000000000)); I then disconnected the sensor and ran the sample. It will hang on the destruction of the Argus::CaptureSession UniqueObj.

(gdb) bt
#0  futex_abstimed_wait_cancelable (private=0, abstime=0xffffffffecf8, clockid=<optimized out>, 
    expected=0, futex_word=0xfffff0000f78) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0xffffffffecf8, clockid=<optimized out>, 
    mutex=0xaaaaaab0f9e0, cond=0xfffff0000f50) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0xfffff0000f50, mutex=0xaaaaaab0f9e0, abstime=0xffffffffecf8)
    at pthread_cond_wait.c:665
#3  0x0000fffff71a8fcc in NvOsConditionWaitTimeout ()
   from /usr/lib/aarch64-linux-gnu/tegra/libnvos.so
#4  0x0000fffff7271104 in nvcamerautils::ConditionVariable::wait(nvcamerautils::Mutex const&, nvcamerautils::UnscaledTimeout const&) const () from /usr/lib/aarch64-linux-gnu/tegra/libnvcamerautils.so
#5  0x0000fffff7f15bc0 in ?? () from /usr/lib/aarch64-linux-gnu/tegra/libnvargus_socketclient.so
#6  0x0000fffff7f18aa4 in ?? () from /usr/lib/aarch64-linux-gnu/tegra/libnvargus_socketclient.so
#7  0x0000fffff7e7979c in ?? () from /usr/lib/aarch64-linux-gnu/tegra/libnvargus_socketclient.so
#8  0x0000aaaaaaabc434 in Argus::UniqueObj<Argus::CaptureSession>::reset (this=0xffffffffef28, 
    obj=0x0) at /usr/src/jetson_multimedia_api/argus/include/Argus/Types.h:471
#9  0x0000aaaaaaabb790 in Argus::UniqueObj<Argus::CaptureSession>::~UniqueObj (this=0xffffffffef28, 
    __in_chrg=<optimized out>) at /usr/src/jetson_multimedia_api/argus/include/Argus/Types.h:478
#10 0x0000aaaaaaab7718 in ArgusSamples::execute (options=...)
    at /usr/src/jetson_multimedia_api/argus/samples/userAutoExposure/main.cpp:176
#11 0x0000aaaaaaab7884 in main (argc=1, argv=0xfffffffff488)
    at /usr/src/jetson_multimedia_api/argus/samples/userAutoExposure/main.cpp:541

I’m expecting it to throw an error and then shutdown, instead of hanging. Any advice would be appreciated!

Thanks in advance

3

Suppose the error handle is the error after the streaming start.
For your case maybe return failed by the sensor driver open() or power_on() function.

5

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