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https://issues.apache.org/jira/browse/BEAM-4036?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kenneth Knowles updated BEAM-4036:
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This Jira ticket has a pull request attached to it, but is still open. Did the
pull request resolve the issue? If so, could you please mark it resolved? This
will help the project have a clear view of its open issues.
> Pickler enters infinite recursion with self-referential classes
> ---------------------------------------------------------------
>
> Key: BEAM-4036
> URL: https://issues.apache.org/jira/browse/BEAM-4036
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Chuan Yu Foo
> Priority: P3
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> The pickler recurses infinitely and dies with maximum recursion limit
> exceeded when a module contains a self-referential class (or any class which
> is part of a cycle).
> Here's a minimal example:
> {code}
> class RecursiveClass(object):
> SELF_TYPE = None
> def __init__(self, datum)
> self.datum = 'RecursiveClass:%s' % datum
> RecursiveClass.SELF_TYPE = RecursiveClass
> {code}
> If this is in a module, then the pickler will enter the infinite recursion
> when trying to pickle any nested class in that module.
>
> An actual example is with typing.Type, which is part of a cycle typing.Type
> -> type -> object -> typing.Type. If a module contains an attribute that
> refers to typing.Type, such as a type alias, it will trigger this bug.
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