App Engine dev server: bad runtime process port ['']
Question: I get following error message when I run the local dev server:

    
    
    bad runtime process port ['']
    
    Traceback (most recent call last):
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 565, in <module>
        main()
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 547, in main
        known_paths = addusersitepackages(known_paths)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 278, in addusersitepackages
        user_site = getusersitepackages()
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 253, in getusersitepackages
        user_base = getuserbase() # this will also set USER_BASE
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 242, in getuserbase
        from sysconfig import get_config_var
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sysconfig.py", line 104, in <module>
        _PROJECT_BASE = os.path.dirname(_safe_realpath(sys.executable))
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sysconfig.py", line 99, in _safe_realpath
        return realpath(path)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/posixpath.py", line 366, in realpath
        if islink(component):
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/posixpath.py", line 136, in islink
        return stat.S_ISLNK(st.st_mode)
    AttributeError: 'module' object has no attribute 'S_ISLNK'
    

I have tried to revert a couple of days and run the project in a well known
working state, I get the same error. No problem to upload to google. Other
projects work locally. I use the 1.8.1 SDK.


Answer: I had similar problems locally. I solved deleting all the files .pyc and
reload page.

