Mailman 3 November 2010 - Twisted

[Twisted-Python] twisted-python@twistedmatrix.com Rolex For You -50%
by Rolex.com Nov. 11, 2010

Nov. 11, 2010

1 0

[Twisted-Python] twisted daemonize problem
by Neal Becker Nov. 9, 2010

Nov. 9, 2010

I try to daemonize twisted, but it uses 100% cpu. The problem occurs in this code: def daemonize(log_stdout=False, out_name=None, log_stderr=False, err_name=None): """ Turn current process into a daemon """ pid = os.fork() if (pid == 0): ## os.chdir (workdir) os.setsid() maxfd = os.sysconf("SC_OPEN_MAX") for fd in range(0, maxfd): try: os.close(fd) except OSError: # ERROR (ignore) … [View More]

3 7

Re: [Twisted-Python] Inconsistency in ReconnectingClientFactory
by Brandl, Albert Nov. 9, 2010

Nov. 9, 2010

Hi! Am Mittwoch, den 03-11-2010 um 15:10 schrieb exarkun(a)twistedmatrix.com: > One reason to prefer not to have a fixed value as maxDelay is that > always picking a random values ensures that you'll never have a stampede > of clients all attempting connections at once. This should of course be avoided. On the other hand, it is convenient to have the ability to define a maximum delay (and the name of the variable suggests that the delay won't be any bigger). > It might be best … [View More]

1 0

[Twisted-Python] Conch as a file transfer server
by Laurens Van Houtven Nov. 7, 2010

Nov. 7, 2010

Hi! I've figured out vaguely how to use Conch as a file transfer client thanks to the cftp script. I'm currently trying to adapt the simple SSH server script example (link below) to do file *serving*. I can't find any example code that actually does this or documentation on this subject. There's conch's test_filetransfer which indeed does have some server parts, but being unit tests they gloss over a lot of the things I think I need to know to get this working for an actual file server. For … [View More]

3 5

[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com Nov. 7, 2010

Nov. 7, 2010

1 0

[Twisted-Python] pb.Cacheable doc question
by Stephen Waterbury Nov. 6, 2010

Nov. 6, 2010

First, the "PB Copyable: Passing Complex Types" doc is *great* and the examples are excellent -- my compliments to all who contributed! My question is about the pb.Cacheable section (http://twistedmatrix.com/documents/current/core/howto/pb-copyable.html#auto9) -- specifically the first sentence: 'Sometimes the object you want to send to the remote process is big and slow. "big" means it takes a lot of data (storage, network bandwidth, processing) to represent its state. "slow" means that … [View More]

8 19

[Twisted-Python] Catching all the exceptions in a Twisted program
by Facundo Batista Nov. 6, 2010

Nov. 6, 2010

Hello! I've just subscribed to the list, but I'm using Twisted from a while ago. I need to do something, and wasn't able to find out how to do it. Well, I *did* find out, but it's a horrible hack, and actually depends on something that may be a bug, so it's worth asking here about this :) In a project I'm doing [0], I want to catch all problems (unhandled exceptions), log them and show them in stderr after a bit massaging. My first approach was to hook me in sys.excepthook, and it worked … [View More]

2 2

[Twisted-Python] [newb] another process question
by Neal Becker Nov. 5, 2010

Nov. 5, 2010

Using this code: ... def processEnded(self, reason): print "processEnded, task %s, status %s" % (self.task, reason.value.exitCode,) Here is what I get from a normally terminated process processEnded, task ['sleep', '4']31662, status 0 But now I kill the subprocess, with SIGTERM, and I get: processEnded, task ['sleep', '15']31663, status None This seems to disagree with the twisted process doc. Instead of an exitCode, I seem to have gotten 'None' .processEnded(status): This is … [View More]

2 1

[Twisted-Python] [newb] daemon question
by Neal Becker Nov. 5, 2010

Nov. 5, 2010

I have put together a simple twisted server using xmlrpc and process. I want to run this server as a unix daemon. Specifically, detach from controlling terminal, and redirect stdout, stderr to a log file. What is the easiest approach, and where to look for documentation on this?

4 3

[Twisted-Python] Inconsistency in ReconnectingClientFactory
by Brandl, Albert Nov. 3, 2010

Nov. 3, 2010

Hi! The ReconnectingClientFactory class allows to define the instance variable maxDelay. Its documentation is "Maximum number of seconds between connection attempts." maxDelay is used in the retry() method to bound self.delay. But this happens in the _first_ step of the calculation of self.delay. Afterwards, the bounded value is modified again by applying random.normalvariate to allow for the jitter. This can result in a value that is considerably bigger than maxDelay. Is there any … [View More]

2 1

[Twisted-Python] Twisted with callInThread
by Mike Zupan Nov. 2, 2010

Nov. 2, 2010

I stripped down my app but this should give you an example of what i'm doing def run_app(f): p = Popen(['/usr/bin/app'],stdout=PIPE) while True: o = p.stdout.readline() if o == '' and p.poll() != None: break reactor.callFromThread(f, o) class Echo(Protocol): def connectionMade(self): reactor.callInThread(run_app, self.appDataReceived) def dataReceived(self, data): data = data.strip() if data == "getmore": print "… [View More]

2 1

[Twisted-Python] Immediate removal of cfreactor
by exarkun＠twistedmatrix.com Nov. 1, 2010

Nov. 1, 2010

Hello all, As reported in <http://twistedmatrix.com/trac/ticket/4652>, some problems have arisen with cfreactor. First, recent versions of Pyrex reject the Pyrex source for the support modules. This makes future development on cfreactor difficult (although Glyph's branch does resolve this problem - or at least appears to). Second, the C source files do not build with clang. This seems likely to become more important on future versions of OS X (the only platform where this code … [View More]

3 4

Re: [Twisted-Python] connectionLost never reached after calling loseConnection: stuck in CLOSE_WAIT forever
by Stefano Debenedetti Nov. 1, 2010

Nov. 1, 2010

Hello Jean-Paul, thanks for tracking this down, you rock! I promise that when I'll have payed all by debts I'll buy one of those posters of Exarkun to hang on my wall! JP wrote: > After a few runs, I managed to reproduce the problem. I instrumented the reactor with some extra logging and test_producer.py with a manhole server. > The sequence of events appears to be something like this: > > OneA has a producer of OneE > OneA has a consumer of OneB > At some point OneB … [View More]

5 8