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Potential Python problem in Ubuntu 12.04 LTS 64Bit and fuerte?

asked 2012-06-22 07:22:21 -0600

updated 2014-01-28 17:12:46 -0600

ngrennan gravatar image

Hi all,

currently I have installed a fresh Ubuntu 12.04 LTS 6 4Bit and ROS fuerte. Unfortunately I noticed several problems by using it. The most weirdest issue is given by executing the roscore which is prompting python failure messages "AttributeError("'_DummyThread' object has no attribute '_Thread__block'",)".

So if I just start the core by :

roscore

the system prompts following results:

... logging to /home/tlinder/.ros/log/c84ccda0-bc8c-11e1-986c-0024d76d2f84/roslaunch-fhg-thorsten-2827.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://localhost:52473/
ros_comm version <unversioned>

SUMMARY
========

PARAMETERS
 * /rosdistro
 * /rosversion

NODES

auto-starting new master
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[master]: started with pid [2852]
ROS_MASTER_URI=http://localhost:11311/

setting /run_id to c84ccda0-bc8c-11e1-986c-0024d76d2f84
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[rosout-1]: started with pid [2865]
started core service [/rosout]

So as you can see, some python components are crashing and producing this errors:

Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored

Edit1:

It seems to be a known bug of python 2.7 which is still open.

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2 Answers

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answered 2012-06-22 07:42:36 -0600

rlinsalata gravatar image

updated 2012-06-22 07:43:35 -0600

A couple people have been noticing/asking about this issue (http://answers.ros.org/question/34304/exception-attributeerror-when-starting-roscore/?answer=34307#post-id-34307).

Apparently it is a Python-internal bug, which we just need to wait for the fix to be released (both tickets closed):

(Though, I have to wonder if it is related to any of the hiccups I've been encountering in some of the basic python tutorial/example code, e.g. tf, turtle_tf)

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answered 2012-12-07 07:27:36 -0600

comvis_user gravatar image

I am also having the problem of "Exception AttributeError" when running roscore using Ubuntu 12.04 and ROS fuerte. How did you solved this issue?

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Asked: 2012-06-22 07:22:21 -0600

Seen: 3,901 times

Last updated: Dec 07 '12