[Buildbot] #3101: exception while rendering logs

[Buildbot trac]

#3101: exception while rendering logs
-------------------+-------------------
Reporter:  sa2ajj  |      Owner:
    Type:  defect  |     Status:  new
Priority:  major   |  Milestone:  0.9.0
 Version:  master  |   Keywords:  web
-------------------+-------------------
 From `twistd.log`:

 {{{
 2014-12-08 18:26:39+0000 [-] while handling API request
         Traceback (most recent call last):
           File "/usr/home/bbmaster/master/lib/python2.7/site-
 packages/twisted/internet/defer.py", line 1097, in _inlineCallbacks
             result = result.throwExceptionIntoGenerator(g)
           File "/usr/home/bbmaster/master/lib/python2.7/site-
 packages/twisted/python/failure.py", line 389, in
 throwExceptionIntoGenerator
             return g.throw(self.type, self.value, self.tb)
           File "/usr/home/bbmaster/buildbot/master/buildbot/www/rest.py",
 line 374, in renderRest
             request.write(data)
           File "/usr/local/lib/python2.7/contextlib.py", line 35, in
 __exit__
             self.gen.throw(type, value, traceback)
         --- <exception caught here> ---
           File "/usr/home/bbmaster/buildbot/master/buildbot/www/rest.py",
 line 111, in handleErrors
             yield
           File "/usr/home/bbmaster/buildbot/master/buildbot/www/rest.py",
 line 308, in renderRest
             data = yield ep.get(rspec, kwargs)
           File "/usr/home/bbmaster/master/lib/python2.7/site-
 packages/twisted/internet/defer.py", line 1097, in _inlineCallbacks
             result = result.throwExceptionIntoGenerator(g)
           File "/usr/home/bbmaster/master/lib/python2.7/site-
 packages/twisted/python/failure.py", line 389, in
 throwExceptionIntoGenerator
             return g.throw(self.type, self.value, self.tb)
           File
 "/usr/home/bbmaster/buildbot/master/buildbot/data/logchunks.py", line 78,
 in get
             logid, firstline, lastline)
           File "/usr/home/bbmaster/master/lib/python2.7/site-
 packages/twisted/python/threadpool.py", line 196, in _worker
             result = context.call(ctx, function, *args, **kwargs)
           File "/usr/home/bbmaster/master/lib/python2.7/site-
 packages/twisted/python/context.py", line 118, in callWithContext
             return self.currentContext().callWithContext(ctx, func, *args,
 **kw)
           File "/usr/home/bbmaster/master/lib/python2.7/site-
 packages/twisted/python/context.py", line 81, in callWithContext
             return func(*args,**kw)
           File "/usr/home/bbmaster/buildbot/master/buildbot/db/pool.py",
 line 191, in __thd
             rv = callable(arg, *args, **kwargs)
           File "/usr/home/bbmaster/buildbot/master/buildbot/db/logs.py",
 line 83, in thd
             idx = content.rindex('\n', 0, idx - 1)
         exceptions.ValueError: substring not found
 }}}

 The outcome seems to be `500 Internal Server Error` by nginx.

--
Ticket URL: <http://trac.buildbot.net/ticket/3101>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation