pydev-users

[Pydev-users] [Users] Error connecting to python process

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

The following forum message was posted by maerrie at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4945301:

Hello there,

I got a problem with the Codecompletion. It freezes for some time and after
that I get sometimes (not after every try) the following error:

Error connecting to python process (Name:C:\Python32\python.
 exe:EndName:Version3.2Executable:C:\Python32\python.exe|D:
 \eclipse\configuration\org.eclipse.
 osgi\bundles\356\1\.cp\PySrc|C:\Windows\system32\python32.
 zip|C:\Python32\DLLs|C:\Python32\lib|C:\Python32|C:
 \Python32\lib\site-
 packages@$|Image|OpenGL|__main__|_ast|_bisect|_bytesio|_codec
 s|_codecs_cn|_codecs_hk|_codecs_iso2022|_codecs_jp|_codecs_kr|_
 codecs_tw|_collections|_csv|_datetime|_fileio|_functools|_heapq|_h
 otshot|_io|_json|_locale|_lsprof|_md5|_multibytecodec|_pickle|_ran
 dom|_sha|_sha1|_sha256|_sha512|_sre|_string|_struct|_subprocess|_s
 ymtable|_thread|_warnings|_weakref|_winreg|array|atexit|audioop|
 binascii|builtins|cPickle|cStringIO|cmath|datetime|email|errno|exce
 ptions|future_builtins|gc|hashlib|imageop|imp|itertools|marshal|m
 ath|mmap|msvcrt|nt|numpy|operator|os|os.
 path|parser|pytest|scipy|signal|socket|strop|sys|thread|time|winreg|
 wx|wxPython|xxsubtype|zipimport|zlib "D:
 \eclipse\configuration\org.eclipse.
 osgi\bundles\356\1\.cp\PySrc\pycompletionserver.py" 51507 
 51506)  - the process in NOT ALIVE anymore (output=1) -  the 
 output of the process is: Std output:


Err output:
Traceback (most recent call last):
  File "D:\eclipse\configuration\org.eclipse.
   osgi\bundles\356\1\.cp\PySrc\pycompletionserver.py", line 21, in 
   <module>
    from java.lang import Thread
ImportError: No module named java.lang

During handling of the above exception, another exception 
 occurred:

Traceback (most recent call last):
  File "D:\eclipse\configuration\org.eclipse.
   osgi\bundles\356\1\.cp\PySrc\pycompletionserver.py", line 32, in 
   <module>
    import importsTipper
ImportError: No module named importsTipper

I've read here the solution with switching off the firewalls. That actually
didn't work for me.
Without the Win-firewall and disabled AntiVir the same error occurs.

Does anybody have a other solution?

Cheers,
Marius

[Pydev-users] [Users] RE: Error connecting to python process

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

The following forum message was posted by  at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4945301:

I also encountered a similar problem trying to get autocompletion going in PyDev
2.4.0 + Jython 2.5.2. My error was:

[code]java.lang.RuntimeException: Error connecting to python process (
C:\NotBackedUp\dev\apps\development_tools\jdk1.6.0_23\bin\javaw.exe
....\pycompletionserver.py 54525 54524)  - the process in still alive (killing
it now)-  the output of the process is: Std output:[/code]

Upon investigating it, I discovered that the spawn Jython interpretter process
was taking too long to run the pycompletionserver.py script so the PyDev process
was assuming it had stopped responding and was killing it before it could start.

I traced the root cause of the slow Jython startup to this issue discussed here
[url]http://geek.starbean.net/?p=347[/url]. Basically the JVM (java1.6.0_23)
was hanging while trying to create a temporary file because the SecureRandom
number generator used for generating temp file names relies on a SeedGenerator
class which builds a system entropy from the files in my computer's temp directory
(amongst other things). My temp directory (pointed to by java.io.tmpdir) had
16,000+ files, and generating a fully directory was taking more than a minute.

Anyhow, jumping to the obvious solution, I just cleaned out my temp directory
and Jython's startup time improved significantly and that allowed
the pycompletionserer.py script to startup within a period of time acceptable
to the PyDev plugin. Hope this helps someone.