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eclipsegoogle-app-enginepython-2.7pydevbreakpoints

PyDev Breakpoints in App Engine 1.7.6 broken?

I just upgraded to the App Engine 1.7.6 SDK for my python app and realised that breakpoints no longer work in PyDev (Eclipse plugin) when using the new dev_appserver.py.

Does anyone know of a way of enabling them again? I assume the new server is spawning a new process for the web server, and the debugger isn't attaching to that one. I'm not sure how to configure it to do that though.

In the meantime I am using the old_dev_appserver.py server.

Solution

  • UPDATE 2012-07-27:

    Following the comment, I verified, the issue is solved after updating to PyDev. 2.8 and App Engine 1.8.2

    OBSOLETE:

    I found the following analysis of the problem at googleappengine issues tracker

    The reason why PDB doesn't work is because dev_appserver is using stdin/stdout for interprocess communication. Python has built-in libraries for IPC: http://docs.python.org/2/library/ipc.html. dev_appserver should use these, and then stdin/stdout can be left alone so that PDB still works.

    So it seems that there is no workaround, rather than reverting to use old_dev_appserver.py

    UPDATE 2013-04-23: Inability to debug is annoying. Many developers complain about it

    1. PyDev Breakpoints in App Engine 1.7.6 broken?
    2. https://groups.google.com/forum/?fromgroups=#!topic/google-appengine/ep5BWYKpQpU
    3. https://groups.google.com/forum/?fromgroups=#!topic/google-appengine/TCQuJpF44cY
    4. https://code.google.com/p/appengine-devappserver2-experiment/issues/detail?id=28
    5. https://code.google.com/p/googleappengine/issues/detail?id=9012

    I am keeping track of the development of this issue here: http://goo.gl/XRU01