Failure of unittest_pilz_joint_trajectory_controller_is_executing (Travis)

[martiniil]

Commit

1489a9f from here: #408

Log

[ROSUNIT] Outputting test results to /root/target_ws/build/pilz_control/test_results/pilz_control/rostest-test_unittest_pilz_joint_trajectory_controller_is_executing.xml


terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::condition_error> >'


  what():  boost::condition_variable::do_wait_until failed in pthread_cond_timedwait: Invalid argument

Full log: https://travis-ci.org/github/PilzDE/pilz_robots/jobs/703499360

Some thoughts

I don't think that this is related to the changes of #408.

This is a sporadic failure. I haven't seen it locally, so far. I have no clue, which part of the code generates this failure. We are not directly using boost in pilz_control.

Google showed me this: boostorg/thread#308

[martiniil]

More links which might help:
ros/actionlib#143
ros/actionlib#41
https://answers.ros.org/question/326853/boost-mutex-error-when-using-simpleactionclient-with-stdunique_ptr/

[martiniil]

The std::future used in the test should not be a problem. If the thread is not completed, the destructor of the future object is blocking. The result would be

RLTestTimeoutException: max time [60.0s] allotted for test

[martiniil]

Did not occur for 28 days and I am not able to reproduce it.