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Documentation to fix #6300

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Thomas S Hatch 2014-05-14 13:54:11 -06:00
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doc/topics/troubleshooting/minion.rst
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@ -114,3 +114,16 @@ Then pass the signal to the minion when it seems to be unresponsive:
When filing an issue or sending questions to the mailing list for a problem
with an unresponsive daemon, be sure to include this information if possible.
Multiprocessing in Execution Modules
====================================
As is outlined in github issue #6300, Salt cannot use python's multiprocessing
pipes and queues from execution modules. Multiprocessing from the execution
modules is perfectly viable, it is just necessary to use Salt's event system
to communicate back with the process.
The reason for this difficulty is that python attempts to pickle all objects in
memory when communicating, and it cannot pickle function objects. Since the
Salt loader system creates and manages function objects this causes the pickle
operation to fail.