Traceback (most recent call last):
  File "/opt/csw/lib/python2.7/site-packages/buildbot/process/build.py", line 410, in startNextStep
    d = defer.maybeDeferred(s.startStep, self.remote)
  File "/opt/csw/lib/python2.7/site-packages/twisted/internet/defer.py", line 137, in maybeDeferred
    result = f(*args, **kw)
  File "/opt/csw/lib/python2.7/site-packages/twisted/internet/defer.py", line 1213, in unwindGenerator
    return _inlineCallbacks(None, gen, Deferred())
  File "/opt/csw/lib/python2.7/site-packages/twisted/internet/defer.py", line 1070, in _inlineCallbacks
    result = g.send(result)
--- <exception caught here> ---
  File "/opt/csw/lib/python2.7/site-packages/buildbot/process/buildstep.py", line 334, in startStep
    result = yield self.start()
  File "/opt/csw/lib/python2.7/site-packages/buildbot/steps/shell.py", line 258, in start
    self.startCommand(cmd, warnings)
  File "/opt/csw/lib/python2.7/site-packages/buildbot/process/buildstep.py", line 658, in startCommand
    self.stdio_log = stdio_log = self.addLog("stdio")
  File "/opt/csw/lib/python2.7/site-packages/buildbot/process/buildstep.py", line 520, in addLog
    loog = self._step_status.addLog(name)
  File "/opt/csw/lib/python2.7/site-packages/buildbot/status/buildstep.py", line 234, in addLog
    log = LogFile(self, name, logfilename)
  File "/opt/csw/lib/python2.7/site-packages/buildbot/status/logfile.py", line 240, in __init__
    self.openfile = open(fn, "w+")
exceptions.IOError: [Errno 24] Too many open files: '/home/buildbot/master/curl-threaded-solaris11-i386/3775-log-Mail_result-stdio'