[volunteergrid2-l] Stats gatherer suddenly stopped working

[Christoph Langguth]

Subject says it all...

The stats gather seems to have crashed for some reason. Now, when I'm 
trying to start it again, I get this output:

tahoe at bender:~$ ./TAHOE_BIN/allmydata-tahoe-1.9.0/bin/tahoe start 
/home/tahoe/stats-gatherer
STARTING '/home/tahoe/stats-gatherer'
Traceback (most recent call last):
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/support/lib/python2.6/site-packages/Twisted-10.1.0-py2.6-linux-x86_64.egg/twisted/application/app.py", 
line 626, in run
     runApp(config)
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/support/lib/python2.6/site-packages/Twisted-10.1.0-py2.6-linux-x86_64.egg/twisted/scripts/twistd.py", 
line 23, in runApp
     _SomeApplicationRunner(config).run()
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/support/lib/python2.6/site-packages/Twisted-10.1.0-py2.6-linux-x86_64.egg/twisted/application/app.py", 
line 374, in run
     self.application = self.createOrGetApplication()
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/support/lib/python2.6/site-packages/Twisted-10.1.0-py2.6-linux-x86_64.egg/twisted/application/app.py", 
line 439, in createOrGetApplication
     application = getApplication(self.config, passphrase)
--- <exception caught here> ---
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/support/lib/python2.6/site-packages/Twisted-10.1.0-py2.6-linux-x86_64.egg/twisted/application/app.py", 
line 450, in getApplication
     application = service.loadApplication(filename, style, passphrase)
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/support/lib/python2.6/site-packages/Twisted-10.1.0-py2.6-linux-x86_64.egg/twisted/application/service.py", 
line 390, in loadApplication
     application = sob.loadValueFromFile(filename, 'application', 
passphrase)
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/support/lib/python2.6/site-packages/Twisted-10.1.0-py2.6-linux-x86_64.egg/twisted/persisted/sob.py", 
line 210, in loadValueFromFile
     exec fileObj in d, d
   File "tahoe-stats-gatherer.tac", line 8, in <module>
     g = stats.StatsGathererService(verbose=verbose)
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/src/allmydata/stats.py", 
line 289, in __init__
     self.stats_gatherer = PickleStatsGatherer(self.basedir, verbose)
   File 
"/home/tahoe/TAHOE_BIN/allmydata-tahoe-1.9.0/src/allmydata/stats.py", 
line 255, in __init__
     self.gathered_stats = pickle.load(f)
   File "/usr/lib/python2.6/pickle.py", line 1370, in load
     return Unpickler(file).load()
   File "/usr/lib/python2.6/pickle.py", line 858, in load
     dispatch[key](self)
   File "/usr/lib/python2.6/pickle.py", line 880, in load_eof
     raise EOFError
exceptions.EOFError:

Failed to load application:

tahoe at bender:~$

That's a beautiful stack trace, but to me it doesn't provide any useful 
information to determine what went wrong.

Does anyone have a clue how to troubleshoot the issue?
Thanks & cheers
Chris

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