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Showing content from https://github.com/ipython/ipython/issues/1966/ below:

packer could not serialize a simple message · Issue #1966 · ipython/ipython · GitHub

I installed ipython, pyzmq, tornado, via easy_install. After installation, when I run

ipython notebook

I get.

Traceback (most recent call last):
  File "/home/skumaran/ipython/lib/python2.6/site-packages/tornado-2.3.post1-py2.6.egg/tornado/web.py", line 1021, in _execute
    getattr(self, self.request.method.lower())(*args, **kwargs)
  File "/home/skumaran/ipython/lib/python2.6/site-packages/tornado-2.3.post1-py2.6.egg/tornado/web.py", line 1794, in wrapper
    return method(self, *args, **kwargs)
  File "/home/skumaran/ipython/lib/python2.6/site-packages/IPython/frontend/html/notebook/handlers.py", line 295, in post
    kernel_id = km.start_kernel(notebook_id)
  File "/home/skumaran/ipython/lib/python2.6/site-packages/IPython/frontend/html/notebook/kernelmanager.py", line 250, in start_kernel
    kernel_id = super(MappingKernelManager, self).start_kernel(**kwargs)
  File "/home/skumaran/ipython/lib/python2.6/site-packages/IPython/frontend/html/notebook/kernelmanager.py", line 74, in start_kernel
    config=self.config,
  File "/home/skumaran/ipython/lib/python2.6/site-packages/IPython/zmq/kernelmanager.py", line 648, in __init__
    self.session = Session(config=self.config)
  File "/home/skumaran/ipython/lib/python2.6/site-packages/IPython/zmq/session.py", line 374, in __init__
    self._check_packers()
  File "/home/skumaran/ipython/lib/python2.6/site-packages/IPython/zmq/session.py", line 394, in _check_packers
    raise ValueError("packer could not serialize a simple message")
ValueError: packer could not serialize a simple message
ERROR:root:500 POST /kernels?notebook=b9460f11-8dc5-4826-8618-1c6d18a60ed3 (127.0.0.1) 17.25ms

What is the way to troubleshoot this?


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