salt: Salt-master: Could not deserialize msgpack message

Hello,

Today salt-master welcomed me with such message:

2015-01-05 17:12:08,160 [salt.payload     ][CRITICAL][26157] Could not deserialize msgpack message: This o
ften happens when trying to read a file not in binary mode.Please open an issue and include the following
error:
2015-01-05 17:12:08,183 [salt.log.setup   ][ERROR   ][26157] An un-handled exception was caught by salt's
global exception handler:
UnpackValueError:
Traceback (most recent call last):
  File "/usr/bin/salt", line 10, in <module>
    salt_main()
  File "/usr/lib/python2.7/dist-packages/salt/scripts.py", line 351, in salt_main
    client.run()
  File "/usr/lib/python2.7/dist-packages/salt/cli/salt.py", line 191, in run
    for full_ret in cmd_func(**kwargs):
  File "/usr/lib/python2.7/dist-packages/salt/client/__init__.py", line 594, in cmd_cli
    **kwargs):
  File "/usr/lib/python2.7/dist-packages/salt/client/__init__.py", line 1235, in get_cli_event_returns
    expect_minions=(verbose or show_timeout)
  File "/usr/lib/python2.7/dist-packages/salt/client/__init__.py", line 885, in get_iter_returns
    for raw in ret_iter:
  File "/usr/lib/python2.7/dist-packages/salt/client/__init__.py", line 809, in get_returns_no_block
    raw = event.get_event_noblock()
  File "/usr/lib/python2.7/dist-packages/salt/utils/event.py", line 450, in get_event_noblock
    mtag, data = self.unpack(raw, self.serial)
  File "/usr/lib/python2.7/dist-packages/salt/utils/event.py", line 296, in unpack
    data = serial.loads(mdata)
  File "/usr/lib/python2.7/dist-packages/salt/payload.py", line 95, in loads
    return msgpack.loads(msg, use_list=True)
  File "_unpacker.pyx", line 119, in msgpack._unpacker.unpackb (msgpack/_unpacker.cpp:119)
UnpackValueError

While running any state.* command on any minion.

Running ubuntu 14.04 and salt:

root@salt-master:~#  salt --versions-report
           Salt: 2015.2.0-37-g0452b43
         Python: 2.7.6 (default, Mar 22 2014, 22:59:56)
         Jinja2: 2.7.2
       M2Crypto: 0.21.1
 msgpack-python: 0.3.0
   msgpack-pure: Not Installed
       pycrypto: 2.6.1
        libnacl: Not Installed
         PyYAML: 3.10
          ioflo: Not Installed
          PyZMQ: 14.0.1
           RAET: Not Installed
            ZMQ: 4.0.4
           Mako: 0.9.1

About this issue

Original URL
State: closed
Created 9 years ago
Comments: 63 (27 by maintainers)

Most upvoted comments

I ran into this problem today while fiddling about with configuration and testing features and found my problem to be a mismatch in hash_type. I had entered SHA256 as suggested by the salt-master log-file in /etc/salt/master, while the accepted value was sha256. Apparently case sensitive. I’m not sure if this helps anyone, but it fixed the problem for me.

embercoat on May 13, 2016