custom PYTHON_EGG_CACHE path for fcgi_frontend = 100% cpu

[xuefer@…]

I'm running trac using fcgi_frontend. by setting PYTHON_EGG_CACHE=some path, even to the default value of PYTHON_EGG_CACHE, will cause python/trac to read egg file again and again, but never read the files in PYTHON_EGG_CACHE folder. (only .mo files are read)

strace -e open -fp ...

[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7531] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 37
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25
[pid  7532] open("/usr/local/lib/python2.7/site-packages/Trac-1.0.6post2-py2.7.egg", O_RDONLY) = 25

without setting any PYTHON_EGG_CACHE (or re-install with zip_safe = False) it's just fine.

[anonymous]

python —version Python 2.7.9

[anonymous]

hrm.. the statement about PYTHON_EGG_CACHE seems false. i still need to use zip_safe to by pass the egg issue

[Jun Omae]

It seems to be a setuptools issue. If setuptools 5.4 - 5.6 is using, it would lead performance degradation. See TracInstall#Usingeasy_install.

Could you please post versions of using libraries from System Information in your /about page?

[anonymous]

System Information

Package	Version
Trac	1.0.6post2
Babel	1.3
Genshi	0.7 (with speedups)
Pygments	2.0.1
pysqlite	2.6.0
Python	2.7.9 (default, Mar 1 2015, 12:57:24) [GCC 4.9.2]
pytz	2012c
setuptools	5.5.1
SQLite	3.8.7.1
Subversion	1.8.10 (r1615264)
jQuery	1.7.2
jQuery UI	1.8.21
jQuery Timepicker	1.0.1

exactly as you describe. sorry that i didn't read "Mandatory Dependencies" because i couldn't figure out the packages' version before my Trac setup is up again

i just check setup.py it says install_requires = [ 'setuptools>=0.6b1', ... ], but i can get it installed without satisfying the requirement

this is Linux lighttpd.net 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt9-3~deb8u1 (2015-04-24) x86_64 GNU/Linux

[Jun Omae]

Closing as an InstallationIssue.

Currently, when setuptools 5.4-5.6 is detected, Trac issues the warning to stderr of trac-admin and web server. If wsgi.errors is available, use it instead of the stderr, e.g. mod_wsgi. Introduced in [13116].

$ /dev/shm/setuptools/bin/trac-admin
Warning: Detected setuptools version 5.4. The environment variable 'PKG_RESOURCES_CACHE_ZIP_MANIFESTS' must be set to avoid significant performance degradation.
trac-admin - The Trac Administration Console 1.0.6post2

Usage: trac-admin </path/to/projenv> [command [subcommand] [option ...]]

Invoking trac-admin without command starts interactive mode.

help     Show documentation
initenv  Create and initialize a new environment

See also ​pypa-setuptools-issue:240.