On Mar 27, 2009, at 11:21 AM, Kyle McKay wrote:
> From the xcode-users mailing list:
>
>> From: Chris Espinosa <cde_at_apple.com>
>> Date: March 26, 2009 15:39:14 PDT
>> To: Xcode Users <xcode-users_at_lists.apple.com>
>> Subject: Re: Xcode 3.1.2 and Subversion 1.6
>>
>> On Mar 25, 2009, at 3:19 PM, Chris Espinosa wrote:
>>> On Mar 25, 2009, at 3:07 PM, Rob Lockstone wrote:
>>>
>>>> Has anyone tried using Xcode 3.1.2 with the subversion 1.6.0
>>>> client? I think I recall (but may be wrong) that newer versions of
>>>> Xcode don't make assumptions about the version of subversion
>>>> that's installed and simply use whatever version it finds.
>>>
>>> We have not yet qualified any version of Xcode with Subversion
>>> 1.6.0 and don't recommend replacing existing Subversion library or
>>> client code with 1.6 until we've given it the green light.
>>
>> We've discovered in internal testing that this patch in Subversion
>> 1.6:
>>
>> http://svn.collab.net/viewvc/svn?view=revision&revision=35533
>>
>> can cause Subversion 1.6 to leave behind zombie ssh processes every
>> time you save a file in Xcode, and eventually exhaust your ability
>> to spawn new processes. We don't recommend using Subversion 1.6
>> with Xcode 3.1.x at this time.
>>
>> Chris
>
> From:
>
> http://svn.apache.org/repos/asf/apr/apr/tags/1.0.0/include/apr_thread_proc.h
>
> APR_KILL_NEVER // process is never sent any signals
> APR_KILL_ALWAYS // process is sent SIGKILL on apr_pool_t cleanup
> APR_KILL_AFTER_TIMEOUT // SIGTERM, wait 3 seconds, SIGKILL
> APR_JUST_WAIT // wait forever for the process to complete
> APR_KILL_ONLY_ONCE // send SIGTERM and then wait
>
> Restoring the apr_pool_note_subprocess and using APR_KILL_NEVER would
> allow the children to be reaped provided they exit before pool
> cleanup.
>
> However, that would likely not eliminate the zombie problem in Xcode
> as pool cleanup probably happens faster than ssh cleanup and exit in
> some cases. How about using APR_KILL_AFTER_TIMEOUT or
> APR_KILL_ONLY_ONCE (or even APR_JUST_WAIT) ?
How would this interact with ssh connection pooling? The case which
drove r35533 was a user who uses ssh connection pooling for svn
connections. Having svn kill the ssh connection is obviously
hazardous to such a scheme, how would using the other APR_KILL_*
conditions behave there (and would they fix the problem with XCode)?
-Hyrum
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http://subversion.tigris.org/ds/viewMessage.do?dsForumId=462&dsMessageId=1445856
Received on 2009-03-27 17:51:51 CET