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[Pydev-users] [Users] Debug Exception - dictionary changed size dur

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The following forum message was posted by mkoenig65 at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4560990:

We are having a problem debugging our application using the pydev debugger.
We have a application that creates and destroy threads and when a break point
is set in the main thread we occasionally get the following exception

  File "C:\eclipse\plugins\org.python.pydev.debug_1.6.3.2010100513\pysrc\pydevd_
frame.py", line 102, in trace_dispatch
    self.doWaitSuspend(thread, frame, event, arg)
  File "C:\eclipse\plugins\org.python.pydev.debug_1.6.3.2010100513\pysrc\pydevd_
frame.py", line 25, in doWaitSuspend
    self._args[0].doWaitSuspend(*args, **kwargs)
  File "C:\eclipse\plugins\org.python.pydev.debug_1.6.3.2010100513\pysrc\pydevd.py",
line 687, in doWaitSuspend
    self.processInternalCommands()
  File "C:\eclipse\plugins\org.python.pydev.debug_1.6.3.2010100513\pysrc\pydevd.py",
line 399, in processInternalCommands
    [b]for tId in self.RUNNING_THREAD_IDS.keys():[/b]
RuntimeError: dictionary changed size during iteration


>From the code I am assuming this is being caused by one of our background threads
being destroyed changing the self.RUNNING_THREAD_IDS to change.

Has anyone else ran into this? If this is a bug in the debbuger code does anyone
know the issue so I can monitor it.? And last is there a recommend work around/code
change for this.

Thanks 

[Pydev-users] [Users] RE: Debug Exception - dictionary changed size dur

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The following forum message was posted by fabioz at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4560990:

What's your Python version?

Cheers,

Fabio

[Pydev-users] [Users] RE: Debug Exception - dictionary changed size dur

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The following forum message was posted by darrellrmay at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4560990:

I encounter this too with my version is  " PyDev for Eclipse	2.1.0.2011052613"
running on Ubuntu.


If you look in this version at pydevd.py on line 404, you have:

            for tId in self.RUNNING_THREAD_IDS.keys():
                try:
                    if not DictContains(foundThreads, tId):
                        self.processThreadNotAlive(tId)
                except:
                    sys.stderr.write('Error iterating through %s (%s) - %s\n'
% (foundThreads, foundThreads.__class__, dir(foundThreads)))
                    raise

processThreadNotAlive is the method that modifies RUNNING_THREAD_IDS.

They need to fix this by either making a copy of that list and iterate over
that, or make a list of thread id's that we want to delete, and delete them
after this loop iteration.
You can't change this list while iterating over it.

I'm going to patch it tonight and test it.

[Pydev-users] [Users] RE: Debug Exception - dictionary changed size dur

[SourceForge.net <no...@so...>]

The following forum message was posted by darrellrmay at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4560990:

This patch seemed to work for me...

--- pydevd.py.old	2011-06-29 10:15:43.463040992 -0400
+++ pydevd.py	2011-06-29 10:13:00.154231186 -0400
@@ -52,6 +52,7 @@
 import pydevd_io
 from pydevd_additional_thread_info import PyDBAdditionalThreadInfo 
 import time
+import copy
 threadingEnumerate = threading.enumerate
 threadingCurrentThread = threading.currentThread
 
@@ -400,7 +401,8 @@
                     if hasattr(t, 'doKill'):
                         t.doKill()
             
-            for tId in self.RUNNING_THREAD_IDS.keys():
+            runningThreadsCopy = copy.copy(self.RUNNING_THREAD_IDS)
+            for tId in runningThreadsCopy.keys():
                 try:
                     if not DictContains(foundThreads, tId):
                         self.processThreadNotAlive(tId)


cheers,
Darrell.

[Pydev-users] [Users] RE: Debug Exception - dictionary changed size dur

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The following forum message was posted by fabioz at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4560990:

I'm sorry I didn't answer on this thread, but this should be already fixed for
PyDev 2.2 (see release notes at: http://pydev.org/)

Cheers,

Fabio

p.s.: If the current release doesn't work for you, please let me know.