Hi, Just type "sudo twistd" and the errors will go away. (You may already know of this work-around)
I agree with you that it would be nice for these to never show up in the first place. I looked at the ticket you mention, but it seems that the cleaner solution would be to resolve these issues at install/upgrade time. -Alex On Wed, Jun 17, 2009 at 12:47 PM, Rutt, Benjamin<[email protected]> wrote: > I recently installed python-2.6.1 and then twisted-8.2.0 (outside of the > python tree). One of my users is complaining that when he uses trial to > test some twisted programs, although his test passes, he has to stare at a > stack trace like this which mentions dropin.cache.new failing to be written: > > $ cat foo.py > #!/sw/external/python-2.6.1/bin/python > > from twisted.trial import unittest > > class MyTestClass(unittest.TestCase): > def test_foobar(self): > print 'hello, world!' > self.failUnless(1 == 1) > $ /sw/external/twisted-8.2.0/bin/trial ./foo.py > /sw/external/twisted-8.2.0/lib/python/twisted/persisted/sob.py:12: > DeprecationWarning: the md5 module is deprecated; use hashlib instead > > import os, md5, sys > /sw/external/twisted-8.2.0/lib/python/twisted/python/filepath.py:12: > DeprecationWarning: the sha module is deprecated; use the hashlib module > instead > > import sha > /sw/external/twisted-8.2.0/lib/python/twisted/web/microdom.py:181: > SyntaxWarning: assertion is always true, perhaps remove parentheses? > > assert (oldChild.parentNode is self, > Traceback (most recent call last): > File "/sw/external/twisted-8.2.0/lib/python/twisted/python/usage.py", line > 241, in parseOptions > self.postOptions() > File "/sw/external/twisted-8.2.0/lib/python/twisted/scripts/trial.py", > line 293, in postOptions > self['reporter'] = self._loadReporterByName(self['reporter']) > File "/sw/external/twisted-8.2.0/lib/python/twisted/scripts/trial.py", > line 279, in _loadReporterByName > for p in plugin.getPlugins(itrial.IReporter): > File "/sw/external/twisted-8.2.0/lib/python/twisted/plugin.py", line 200, > in getPlugins > allDropins = getCache(package) > --- <exception caught here> --- > File "/sw/external/twisted-8.2.0/lib/python/twisted/plugin.py", line 179, > in getCache > dropinPath.setContent(pickle.dumps(dropinDotCache)) > File "/sw/external/twisted-8.2.0/lib/python/twisted/python/filepath.py", > line 623, in setContent > f = sib.open('w') > File "/sw/external/twisted-8.2.0/lib/python/twisted/python/filepath.py", > line 433, in open > return open(self.path, mode+'b') > exceptions.IOError: [Errno 30] Read-only file system: > '/sw/external/twisted-8.2.0/lib/python/twisted/plugins/dropin.cache.new' > > foo > MyTestClass > test_foobar ... hello, world! > [OK] > > ------------------------------------------------------------------------------- > Ran 1 tests in 0.023s > > PASSED (successes=1) > > I would consider this to be an install bug. Evidently, trial uses plugins, > which upon reading > http://twistedmatrix.com/projects/core/documentation/howto/plugin.html#auto3 > I find that plugins need up-to-date dropin.cache files to be built, or else > they'll be built dynamically; the latter step fails in my case due to my > site-wide install being on a read-only directory. The docs say "when > installing or removing software which provides Twisted plugins, the site > administrator should be sure the cache is regenerated"; however all I did > was install twisted itself, not any specific plugins. All I did to install > twisted was 'python setup.py install --home=...' and at no later point did I > ever add new plugins to it. Why can't the install take care of initial > dropin.cache generation for me? > > I see a related issue http://twistedmatrix.com/trac/ticket/2409. > > Regardless of whether ticket 2409 goes anywhere, should I raise an issue > that the install should really take care of initial dropin.cache generation, > much like python install takes care of std lib .py->.pyc generation? > > Thanks. > > _______________________________________________ > Twisted-Python mailing list > [email protected] > http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python > > -- Alex Clemesha clemesha.org _______________________________________________ Twisted-Python mailing list [email protected] http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
