"Malformed message" errors

[jiahao]

On ZMQ.jl master, 0.4-dev, IPython 3.0, output to stderr appears to confuse ZMQ and the output to stderr is truncated.

error("foo")

 in depwarn at ./deprecated.jl:40
 in int at deprecated.jl:29
 in print_escaped at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:70
 in _print at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:83
 in _print at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:128
 in _print at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:115
 in print at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:191
 in sprint at iostream.jl:229
 in send_ipython at /Users/jiahao/.julia/v0.4/IJulia/src/msg.jl:54
 in execute_request_0x535c5df2 at /Users/jiahao/.julia/v0.4/IJulia/src/execute_request.jl:232
 in eventloop at /Users/jiahao/.julia/v0.4/IJulia/src/IJulia.jl:123
 in anonymous at task.jl:360
WARNING: int(x) is deprecated, use Int(x) instead.
 in depwarn at ./deprecated.jl:40
 in int at deprecated.jl:29
 in print_escaped at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:70
 in _print at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:83
 in _print at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:128
 in _print at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:115
 in print at /Users/jiahao/.julia/v0.4/JSON/src/JSON.jl:191
 in sprint at iostream.jl:229
 in send_ipython at /Users/jiahao/.julia/v0.4/IJulia/src/msg.jl:54
 in execute_request_0x535c5df2 at /Users/jiahao/.julia/v0.4/IJulia/src/execute_request.jl:232
 in eventloop at /Users/jiahao/.julia/v0.4/IJulia/src/IJulia.jl:123
 in anonymous at task.jl:360

[C 17:16:47.399 NotebookApp] Malformed message: ['pyerr', '<IDS|MSG>', 'stderr', '<IDS|MSG>', 'feea04c1d65f9b1f6282b12bbbf136a2a6bc9908c3e4757ac30e5e1a258dcf46', '{"msg_id":"94e3c624-ac90-4ccc-b4cc-e81d6c23685e","msg_type":"stream","username":"username","session":"48B9A761D5C94295878DAD4BC9605B73"}', '{"msg_id":"40E35F1D8DB447FF9D2E6ABE75647703","msg_type":"execute_request","username":"username","session":"48B9A761D5C94295878DAD4BC9605B73"}', '{}', '{"name":"stderr","data":"WARNING: int(x) is deprecated, use Int(x) instead.\\n"}']
    Traceback (most recent call last):
      File "/Library/Python/2.7/site-packages/IPython/html/base/zmqhandlers.py", line 181, in _on_zmq_reply
        msg = self._reserialize_reply(msg_list, channel=channel)
      File "/Library/Python/2.7/site-packages/IPython/html/base/zmqhandlers.py", line 162, in _reserialize_reply
        msg = self.session.deserialize(msg_list)
      File "/Library/Python/2.7/site-packages/IPython/kernel/zmq/session.py", line 832, in deserialize
        raise ValueError("Invalid Signature: %r" % signature)
    ValueError: Invalid Signature: 'stderr'
[C 17:16:47.466 NotebookApp] Malformed message: ['3302ffca83da7fa7bd2463e6da1456705730662c113d8599044157df95ea3ef1', '{"msg_id":"2ce39c5d-9700-4375-8ff8-61c4dd70a2fe","msg_type":"pyerr","username":"username","session":"48B9A761D5C94295878DAD4BC9605B73"}', '{"msg_id":"40E35F1D8DB447FF9D2E6ABE75647703","msg_type":"execute_request","username":"username","session":"48B9A761D5C94295878DAD4BC9605B73"}', '{}', '{"traceback":["LoadError: foo\\nwhile loading In[1], in expression starting on line 1",""," in error at error.jl:19"],"ename":"LoadError","evalue":"LoadError: foo\\nwhile loading In[1], in expression starting on line 1","execution_count":1}']
    Traceback (most recent call last):
      File "/Library/Python/2.7/site-packages/IPython/html/base/zmqhandlers.py", line 181, in _on_zmq_reply
        msg = self._reserialize_reply(msg_list, channel=channel)
      File "/Library/Python/2.7/site-packages/IPython/html/base/zmqhandlers.py", line 161, in _reserialize_reply
        idents, msg_list = self.session.feed_identities(msg_list)
      File "/Library/Python/2.7/site-packages/IPython/kernel/zmq/session.py", line 756, in feed_identities
        idx = msg_list.index(DELIM)
    ValueError: '<IDS|MSG>' is not in list

@skariel any ideas?

[skariel]

can't reproduce, it works fine with my setup which is IPython 3.0 and one of the latest Julia nightlies...

[jiahao]

My build has the small case conversion functions deprecated. I wonder if the deprecation warnings in JSON.jl are confusing ZMQ.

[skariel]

Sounds easy to check, what happens if you remove these warnings?

[JamesWrigley]

I'm gonna close this because I cannot reproduce it on the current IJulia/ZMQ.