[ros-users] Crash in indigo

Tully Foote tfoote at osrfoundation.org
Sun Jul 6 22:40:54 UTC 2014


Thanks for the report. Please file a ticket on the ros_comm issue tracker
And we can follow up on the issue about the appropriate fix.


On Sun, Jul 6, 2014 at 2:38 PM, contradict <contradict at gmail.com> wrote:

> The attached program crashes when run under ros indigo. The crash is
> due to concurrent calls to rospy.get_param(), one in the test code and
> one inside SubscriberStatisticsLogger (rospy/impl/statistics.py:64).
> TransformListener subscribes to tf in a new thread
> (tf/listener.py:238).
> rospy.get_param is documented to be non-threadsafe, but I am not so
> sure about rospy.Subscriber(). If Subscriber() should be thread safe,
> then SubscriberStatisticsLogger needs to be modified to avoid
> concurrent access to the same http connection object as the rest of
> the node. Perhaps it could be given its own connection to the
> parameter server? If Subscriber() is not intended to be threadsafe,
> then TransformListenerThread needs to subscribe in __init__() instead
> of run().
> I am happy to submit a pull request wherever is appropriate.
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