"ZMQError: Interrupted system call" when saving inline figure

[mspacek]

Running ipython-qtconsole --pylab=inline, and then plot(range(10)), followed by right clicking on the inline figure and choosing either "Save Image As..." or "Save SVG As... " generates:

Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
    self.run()
  File "/home/mspacek/source/ipython/IPython/zmq/kernelmanager.py", line 388, in run
    self.ioloop.start()
  File "/usr/local/lib/python2.6/dist-packages/zmq/eventloop/ioloop.py", line 251, in start
    event_pairs = self._impl.poll(poll_timeout)
  File "poll.pyx", line 189, in zmq.core.poll.Poller.poll (zmq/core/poll.c:2108)
  File "poll.pyx", line 101, in zmq.core.poll._poll (zmq/core/poll.c:1391)
ZMQError: Interrupted system call

Exception in thread Thread-3:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
    self.run()
  File "/home/mspacek/source/ipython/IPython/zmq/kernelmanager.py", line 476, in run
    self.ioloop.start()
  File "/usr/local/lib/python2.6/dist-packages/zmq/eventloop/ioloop.py", line 251, in start
    event_pairs = self._impl.poll(poll_timeout)
  File "poll.pyx", line 189, in zmq.core.poll.Poller.poll (zmq/core/poll.c:2108)
  File "poll.pyx", line 101, in zmq.core.poll._poll (zmq/core/poll.c:1391)
ZMQError: Interrupted system call

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
    self.run()
  File "/home/mspacek/source/ipython/IPython/zmq/kernelmanager.py", line 181, in run
    self.ioloop.start()
  File "/usr/local/lib/python2.6/dist-packages/zmq/eventloop/ioloop.py", line 251, in start
    event_pairs = self._impl.poll(poll_timeout)
  File "poll.pyx", line 189, in zmq.core.poll.Poller.poll (zmq/core/poll.c:2108)
  File "poll.pyx", line 101, in zmq.core.poll._poll (zmq/core/poll.c:1391)
ZMQError: Interrupted system call

The file save dialog box does come up though, and the image saves correctly.

[takluyver]

Confirmed. Note that because the ZMQ threads are dead, we can no longer communicate with the kernel after that. I'm going to set this as critical for now because of that - tagging @minrk, @ellisonbg

[mspacek]

I just submitted another issue, #500, which might be related (?)

[takluyver]

Possibly, but at a glance, it looks unrelated.

[minrk]

I can reproduce this on Linux, but not on OSX. As far as I can tell, the QtGui.QFileDialog constructor sends a spurious SIGINT to all child threads, which is completely stupid and bizarre, but I guess we have to deal with it.

There is an issue in pyzmq where EINTR used to produce a warning and continue the loop, but now (as of 2.0.8) will raise. This will be fixed in 2.1.8 (or 2.1.7.2), but I don't think we can depend on that.

[mspacek]

I forgot to mention, I'm on Ubuntu 10.10 x86-64 with zmq and pyzmq 2.1.7.

[minrk]

Should be fixed by #501, can you test?

[mspacek]

Yup, that seemed to do it. Thanks!

By the way, what's the typical way to apply a single commit like this from github to your local branch? I tried stuff like

git cherry-pick 379a29008cb614143024
git cherry-pick 379a29008cb614143024772f7146a926ce0e9278
git cherry-pick https://github.com/minrk/ipython/commit/379a29008cb614143024772f7146a926ce0e9278

as well as git merge commands. Nothing worked. I had to download the tarball and copy the file into my branch.

[minrk]

Cherry pick requires the commit to be in your local content. So:

git remote add minrk https://github.com/minrk/ipython.git

git fetch minrk

then git cherry-pick c4a6eb452 should work.

On Jun 2, 2011, at 18:42, mspacekreply@reply.github.com wrote:

Yup, that seemed to do it. Thanks!

By the way, what's the typical way to apply a single commit like this from github to your local branch? I tried stuff like

git cherry-pick 379a29008cb614143024
git cherry-pick 379a29008cb614143024772f7146a926ce0e9278
git cherry-pick https://github.com/minrk/ipython/commit/379a29008cb614143024772f7146a926ce0e9278

as well as git merge commands. Nothing worked. I had to download the tarball and copy the file into my branch.

Reply to this email directly or view it on GitHub:
#499 (comment)

[mspacek]

Thanks minrk. I'm coming from bzr. Hopefully I'll get the hang of git eventually.