[ python-Bugs-1176467 ] Python garbage collector isn't detecting deadlocks
Bugs item #1176467, was opened at 2005-04-04 09:29 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1176467&group_id=5470 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nathan Marushak (nmarushak) Assigned to: Nobody/Anonymous (nobody) Summary: Python garbage collector isn't detecting deadlocks Initial Comment: BACKGROUND INFORMATION: Python version: Python 2.3.3 (#1, May 7 2004, 10:31:40) Operating System: Linux 2.6.7-1.494.2.2smp #1 SMP Tue Aug 3 09:59:49 EDT 2004 i686 i686 i386 GNU/Linux PROBLEM: The 2.3.3 garbage collector does not appear to detect deadlocks that occur when 2 objects reference one another. I checked the existing bug list, albeit briefly, to see if a similar bug had already been entered. I did not find an existing entry, but I apologize if this is a duplicate. I've attached a short example output file that demonstrates the issue. It would be beneficial if the "gc" module could detect when 2 objects have no other outstanding references except to one another. If modifying gc is not possible for some reason, then updating the Python gc documentation to illustrate this issue would be helpful. WORKAROUND: The problem can be worked around by ensuring each object removes the circular reference when it no longer needs to refer to the other object. -- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1176467&group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[ python-Bugs-1176467 ] Python garbage collector isn't detecting deadlocks
Bugs item #1176467, was opened at 2005-04-04 16:29 Message generated for change (Comment added) made by nascheme You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1176467&group_id=5470 Category: None Group: None >Status: Closed >Resolution: Invalid Priority: 5 Submitted By: Nathan Marushak (nmarushak) >Assigned to: Neil Schemenauer (nascheme) Summary: Python garbage collector isn't detecting deadlocks Initial Comment: BACKGROUND INFORMATION: Python version: Python 2.3.3 (#1, May 7 2004, 10:31:40) Operating System: Linux 2.6.7-1.494.2.2smp #1 SMP Tue Aug 3 09:59:49 EDT 2004 i686 i686 i386 GNU/Linux PROBLEM: The 2.3.3 garbage collector does not appear to detect deadlocks that occur when 2 objects reference one another. I checked the existing bug list, albeit briefly, to see if a similar bug had already been entered. I did not find an existing entry, but I apologize if this is a duplicate. I've attached a short example output file that demonstrates the issue. It would be beneficial if the "gc" module could detect when 2 objects have no other outstanding references except to one another. If modifying gc is not possible for some reason, then updating the Python gc documentation to illustrate this issue would be helpful. WORKAROUND: The problem can be worked around by ensuring each object removes the circular reference when it no longer needs to refer to the other object. -- >Comment By: Neil Schemenauer (nascheme) Date: 2005-04-04 18:22 Message: Logged In: YES user_id=35752 The gc is working as intended and as documented. Please refer to the gc module documentation, especially the section on the "garbage" attribute. Your objects are not collected because they have __del__ methods. -- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1176467&group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[ python-Bugs-1175396 ] codecs.readline sometimes removes newline chars
Bugs item #1175396, was opened at 2005-04-02 17:14 Message generated for change (Comment added) made by doerwalter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1175396&group_id=5470 Category: Python Library Group: Python 2.4 >Status: Closed >Resolution: Accepted Priority: 5 Submitted By: Irmen de Jong (irmen) Assigned to: Walter Dörwald (doerwalter) Summary: codecs.readline sometimes removes newline chars Initial Comment: In Python 2.4.1 i observed a new bug in codecs.readline, it seems that with certain inputs it removes newline characters from the end of the line Probably related to bug #1076985 (Incorrect behaviour of StreamReader.readline leads to crash) and bug #1098990 codec readline() splits lines apart (both with status closed) so I'm assigning this to Walter. See the attached files that demonstrate the problem. Reproduced with Python 2.4.1 on windows XP and on Linux. The problem does not occur with Python 2.4. (btw, it seems bug #1076985 was fixed in python 2.4.1, but the other one (#1098990) not? ) -- >Comment By: Walter Dörwald (doerwalter) Date: 2005-04-05 00:01 Message: Logged In: YES user_id=89016 Checked in a fix as: Lib/codecs.py 1.42/1.43 Lib/test/test_codecs.py 1.22 Lib/codecs.py 1.35.2.6 Lib/test/test_codecs.py 1.15.2.4 Are you really sure, that the fix for #1098990 is not in 2.4.1? According to the tracker for #1098990 the fix was in lib/codecs.py revision 1.35.2.2 and revision 1.35.2.3 is the one that got the r241c1 tag, so the fix should be in 2.4.1. -- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1175396&group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[ python-Bugs-1168983 ] ftplib.py string index out of range
Bugs item #1168983, was opened at 2005-03-23 02:05
Message generated for change (Comment added) made by isandler
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1168983&group_id=5470
Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: David Carroll (vmlinuxz)
Assigned to: Nobody/Anonymous (nobody)
Summary: ftplib.py string index out of range
Initial Comment:
The following code works great on all of the 2.3.x
releases I have used.
def
ftpFetch(localPath,remoteFileDate,ftpSite,ftpPass,ftpDir,ftpUser):
print "Fetching split_mgr report"
fileList=[]
processList=[]
ftp = FTP(ftpSite)
ftp.login(ftpUser,ftpPass)
ftp.dir('LIST '+ftpDir,fileList.append)
for x in range(len(fileList)):
if (string.find(fileList[x],remoteFileDate) != -1):
print fileList[x]
TMP=fileList[x]
output=localPath+str(TMP[45:])
print output
processList.append(output)
print processList
outfile = open(output,'w')
ftp.retrbinary('RETR '+ftpDir+TMP[45:],
open(output, 'wb').write)
ftp.quit()
print processList
return processList
However I get the following error under 2.4
Traceback (most recent call last):
File
"C:\Python24\lib\site-packages\PythonCard\widget.py",
line 417, in _dispatch
handler(background, aWxEvent)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\readwaitreport.py",
line 61, in on_btnRun_command
mainRwclassLoop(self, mm+dd+yy, yesterday)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\rwclass.py",
line 39, in mainRwclassLoop
processList =
ftpFetch(localPath,"split_mgr."+date[0:4],ftpSite,ftpPass,ftpDir,ftpUser)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\rwclass.py",
line 173, in ftpFetch
ftp.dir('LIST '+ftpDir,fileList.append)
File "C:\Python24\lib\ftplib.py", line 464, in dir
self.retrlines(cmd, func)
File "C:\Python24\lib\ftplib.py", line 396, in retrlines
conn = self.transfercmd(cmd)
File "C:\Python24\lib\ftplib.py", line 345, in
transfercmd
return self.ntransfercmd(cmd, rest)[0]
File "C:\Python24\lib\ftplib.py", line 328, in
ntransfercmd
if resp[0] != '1':
IndexError: string index out of range
https://lists.dulug.duke.edu/pipermail/yum/2004-August/005067.html
discusses a similar problem under Linux in the YUM
script, I have reproduced this error under 2000, and XP.
I'm a fairly new programmer, and thus very new to
python so I hope this is enough information. I will
try and keep track of this and help out with more
information in any capacity I can.
Thank you for all your hard work and dedication.
David Carroll
--
Comment By: Ilya Sandler (isandler)
Date: 2005-04-04 19:12
Message:
Logged In: YES
user_id=971153
Could you submit a minimalistic piece of code which
illustrates the problem?
As well as any input data which are required to reproduce it?
(SourceForge garbled your original example)
--
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1168983&group_id=5470
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[ python-Bugs-1168983 ] ftplib.py string index out of range
Bugs item #1168983, was opened at 2005-03-23 05:05
Message generated for change (Settings changed) made by rhettinger
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1168983&group_id=5470
Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: David Carroll (vmlinuxz)
>Assigned to: Raymond Hettinger (rhettinger)
Summary: ftplib.py string index out of range
Initial Comment:
The following code works great on all of the 2.3.x
releases I have used.
def
ftpFetch(localPath,remoteFileDate,ftpSite,ftpPass,ftpDir,ftpUser):
print "Fetching split_mgr report"
fileList=[]
processList=[]
ftp = FTP(ftpSite)
ftp.login(ftpUser,ftpPass)
ftp.dir('LIST '+ftpDir,fileList.append)
for x in range(len(fileList)):
if (string.find(fileList[x],remoteFileDate) != -1):
print fileList[x]
TMP=fileList[x]
output=localPath+str(TMP[45:])
print output
processList.append(output)
print processList
outfile = open(output,'w')
ftp.retrbinary('RETR '+ftpDir+TMP[45:],
open(output, 'wb').write)
ftp.quit()
print processList
return processList
However I get the following error under 2.4
Traceback (most recent call last):
File
"C:\Python24\lib\site-packages\PythonCard\widget.py",
line 417, in _dispatch
handler(background, aWxEvent)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\readwaitreport.py",
line 61, in on_btnRun_command
mainRwclassLoop(self, mm+dd+yy, yesterday)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\rwclass.py",
line 39, in mainRwclassLoop
processList =
ftpFetch(localPath,"split_mgr."+date[0:4],ftpSite,ftpPass,ftpDir,ftpUser)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\rwclass.py",
line 173, in ftpFetch
ftp.dir('LIST '+ftpDir,fileList.append)
File "C:\Python24\lib\ftplib.py", line 464, in dir
self.retrlines(cmd, func)
File "C:\Python24\lib\ftplib.py", line 396, in retrlines
conn = self.transfercmd(cmd)
File "C:\Python24\lib\ftplib.py", line 345, in
transfercmd
return self.ntransfercmd(cmd, rest)[0]
File "C:\Python24\lib\ftplib.py", line 328, in
ntransfercmd
if resp[0] != '1':
IndexError: string index out of range
https://lists.dulug.duke.edu/pipermail/yum/2004-August/005067.html
discusses a similar problem under Linux in the YUM
script, I have reproduced this error under 2000, and XP.
I'm a fairly new programmer, and thus very new to
python so I hope this is enough information. I will
try and keep track of this and help out with more
information in any capacity I can.
Thank you for all your hard work and dedication.
David Carroll
--
Comment By: Ilya Sandler (isandler)
Date: 2005-04-04 21:12
Message:
Logged In: YES
user_id=971153
Could you submit a minimalistic piece of code which
illustrates the problem?
As well as any input data which are required to reproduce it?
(SourceForge garbled your original example)
--
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1168983&group_id=5470
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[ python-Bugs-1168983 ] ftplib.py string index out of range
Bugs item #1168983, was opened at 2005-03-23 02:05
Message generated for change (Comment added) made by isandler
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1168983&group_id=5470
Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: David Carroll (vmlinuxz)
Assigned to: Raymond Hettinger (rhettinger)
Summary: ftplib.py string index out of range
Initial Comment:
The following code works great on all of the 2.3.x
releases I have used.
def
ftpFetch(localPath,remoteFileDate,ftpSite,ftpPass,ftpDir,ftpUser):
print "Fetching split_mgr report"
fileList=[]
processList=[]
ftp = FTP(ftpSite)
ftp.login(ftpUser,ftpPass)
ftp.dir('LIST '+ftpDir,fileList.append)
for x in range(len(fileList)):
if (string.find(fileList[x],remoteFileDate) != -1):
print fileList[x]
TMP=fileList[x]
output=localPath+str(TMP[45:])
print output
processList.append(output)
print processList
outfile = open(output,'w')
ftp.retrbinary('RETR '+ftpDir+TMP[45:],
open(output, 'wb').write)
ftp.quit()
print processList
return processList
However I get the following error under 2.4
Traceback (most recent call last):
File
"C:\Python24\lib\site-packages\PythonCard\widget.py",
line 417, in _dispatch
handler(background, aWxEvent)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\readwaitreport.py",
line 61, in on_btnRun_command
mainRwclassLoop(self, mm+dd+yy, yesterday)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\rwclass.py",
line 39, in mainRwclassLoop
processList =
ftpFetch(localPath,"split_mgr."+date[0:4],ftpSite,ftpPass,ftpDir,ftpUser)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\rwclass.py",
line 173, in ftpFetch
ftp.dir('LIST '+ftpDir,fileList.append)
File "C:\Python24\lib\ftplib.py", line 464, in dir
self.retrlines(cmd, func)
File "C:\Python24\lib\ftplib.py", line 396, in retrlines
conn = self.transfercmd(cmd)
File "C:\Python24\lib\ftplib.py", line 345, in
transfercmd
return self.ntransfercmd(cmd, rest)[0]
File "C:\Python24\lib\ftplib.py", line 328, in
ntransfercmd
if resp[0] != '1':
IndexError: string index out of range
https://lists.dulug.duke.edu/pipermail/yum/2004-August/005067.html
discusses a similar problem under Linux in the YUM
script, I have reproduced this error under 2000, and XP.
I'm a fairly new programmer, and thus very new to
python so I hope this is enough information. I will
try and keep track of this and help out with more
information in any capacity I can.
Thank you for all your hard work and dedication.
David Carroll
--
Comment By: Ilya Sandler (isandler)
Date: 2005-04-04 20:37
Message:
Logged In: YES
user_id=971153
It turns out that the code in plain text bug report is more
or less readable, so I can see what you were trying to do...
Seems like you are doing
ftp.dir("LIST "+ftpDir)
But ftplib docs:
http://www.python.org/doc/current/lib/ftp-objects.html
say that you need to specify the directory
ftp.dir(ftpDir)
so it seems that you are using ftp.dir() incorrectly
But, even then IndexError seems like a wrong kind of
exception for this kind of error...
So, I guess, my original request for a working code snippet
which would allow to reproduce the bug still stands..
--
Comment By: Ilya Sandler (isandler)
Date: 2005-04-04 19:12
Message:
Logged In: YES
user_id=971153
Could you submit a minimalistic piece of code which
illustrates the problem?
As well as any input data which are required to reproduce it?
(SourceForge garbled your original example)
--
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1168983&group_id=5470
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[ python-Bugs-1168983 ] ftplib.py string index out of range
Bugs item #1168983, was opened at 2005-03-23 05:05
Message generated for change (Comment added) made by rhettinger
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1168983&group_id=5470
Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: David Carroll (vmlinuxz)
>Assigned to: Nobody/Anonymous (nobody)
Summary: ftplib.py string index out of range
Initial Comment:
The following code works great on all of the 2.3.x
releases I have used.
def
ftpFetch(localPath,remoteFileDate,ftpSite,ftpPass,ftpDir,ftpUser):
print "Fetching split_mgr report"
fileList=[]
processList=[]
ftp = FTP(ftpSite)
ftp.login(ftpUser,ftpPass)
ftp.dir('LIST '+ftpDir,fileList.append)
for x in range(len(fileList)):
if (string.find(fileList[x],remoteFileDate) != -1):
print fileList[x]
TMP=fileList[x]
output=localPath+str(TMP[45:])
print output
processList.append(output)
print processList
outfile = open(output,'w')
ftp.retrbinary('RETR '+ftpDir+TMP[45:],
open(output, 'wb').write)
ftp.quit()
print processList
return processList
However I get the following error under 2.4
Traceback (most recent call last):
File
"C:\Python24\lib\site-packages\PythonCard\widget.py",
line 417, in _dispatch
handler(background, aWxEvent)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\readwaitreport.py",
line 61, in on_btnRun_command
mainRwclassLoop(self, mm+dd+yy, yesterday)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\rwclass.py",
line 39, in mainRwclassLoop
processList =
ftpFetch(localPath,"split_mgr."+date[0:4],ftpSite,ftpPass,ftpDir,ftpUser)
File "C:\Documents and
Settings\PROTECTED\Desktop\ReadWaitReport\ReadWaitReport\rwclass.py",
line 173, in ftpFetch
ftp.dir('LIST '+ftpDir,fileList.append)
File "C:\Python24\lib\ftplib.py", line 464, in dir
self.retrlines(cmd, func)
File "C:\Python24\lib\ftplib.py", line 396, in retrlines
conn = self.transfercmd(cmd)
File "C:\Python24\lib\ftplib.py", line 345, in
transfercmd
return self.ntransfercmd(cmd, rest)[0]
File "C:\Python24\lib\ftplib.py", line 328, in
ntransfercmd
if resp[0] != '1':
IndexError: string index out of range
https://lists.dulug.duke.edu/pipermail/yum/2004-August/005067.html
discusses a similar problem under Linux in the YUM
script, I have reproduced this error under 2000, and XP.
I'm a fairly new programmer, and thus very new to
python so I hope this is enough information. I will
try and keep track of this and help out with more
information in any capacity I can.
Thank you for all your hard work and dedication.
David Carroll
--
>Comment By: Raymond Hettinger (rhettinger)
Date: 2005-04-04 23:31
Message:
Logged In: YES
user_id=80475
I fixed the IndexError. It should have been a protocol
error. See Lib/ftplib.py 1.74.
Leaving the bug open so the OP can make a more detailed post
so we can see what the root issue is about.
--
Comment By: Ilya Sandler (isandler)
Date: 2005-04-04 22:37
Message:
Logged In: YES
user_id=971153
It turns out that the code in plain text bug report is more
or less readable, so I can see what you were trying to do...
Seems like you are doing
ftp.dir("LIST "+ftpDir)
But ftplib docs:
http://www.python.org/doc/current/lib/ftp-objects.html
say that you need to specify the directory
ftp.dir(ftpDir)
so it seems that you are using ftp.dir() incorrectly
But, even then IndexError seems like a wrong kind of
exception for this kind of error...
So, I guess, my original request for a working code snippet
which would allow to reproduce the bug still stands..
--
Comment By: Ilya Sandler (isandler)
Date: 2005-04-04 21:12
Message:
Logged In: YES
user_id=971153
Could you submit a minimalistic piece of code which
illustrates the problem?
As well as any input data which are required to reproduce it?
(SourceForge garbled your original example)
--
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1168983&group_id=5470
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