[lttng-dev] Python lttngust module import error

Hi,

I'm observing an issue recently wrt import of python3 lttng module.
Following is the error and need your help to find out what is wrong.

>>> import lttngust
Exception in thread system:
Traceback (most recent call last):
  File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.7/threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.7/dist-packages/lttngust/agent.py", line 291, in _client_thread_target
    client = _TcpClient(name, _SESSIOND_HOST, port, reg_queue)
  File "/usr/local/lib/python3.7/dist-packages/lttngust/agent.py", line 76, in __init__
    raise e
  File "/usr/local/lib/python3.7/dist-packages/lttngust/agent.py", line 73, in __init__
    self._log_handler = lttngust.loghandler._Handler()
  File "/usr/local/lib/python3.7/dist-packages/lttngust/loghandler.py", line 32, in __init__
    self.agent_lib = ctypes.cdll.LoadLibrary(_Handler._LIB_NAME)
  File "/usr/lib/python3.7/ctypes/__init__.py", line 434, in LoadLibrary
    return self._dlltype(name)
  File "/usr/lib/python3.7/ctypes/__init__.py", line 356, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: liblttng-ust-python-agent.so: cannot open shared object file: No such file or directory


>>>

I have installed liblttng-ust-python-agent.so

/# ldconfig -p | grep liblttng
      liblttng-ust.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust.so.0
      liblttng-ust-tracepoint.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-tracepoint.so.0
      liblttng-ust-python-agent.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-python-agent.so.0
      liblttng-ust-pthread-wrapper.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-pthread-wrapper.so.0
      liblttng-ust-libc-wrapper.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-libc-wrapper.so.0
      liblttng-ust-fork.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-fork.so.0
      liblttng-ust-fd.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-fd.so.0
      liblttng-ust-dl.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-dl.so.0
      liblttng-ust-cyg-profile.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-cyg-profile.so.0
      liblttng-ust-cyg-profile-fast.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-cyg-profile-fast.so.0
      liblttng-ust-ctl.so.4 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ust-ctl.so.4
      liblttng-ctl.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/liblttng-ctl.so.0


Regards,
Lakshmi

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