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From shixiaogang <...@git.apache.org>
Subject [GitHub] flink issue #3524: [FLINK-6014][checkpoint] Allow the registration of state ...
Date Tue, 21 Mar 2017 01:43:16 GMT
Github user shixiaogang commented on the issue:

    Hi @StephanEwen The main reason is that we must have methods to delete those unshared
objects in failed `PendingCheckpoint`s.  The `discardState()` method is called when either
the `PendingCheckpoint` fails or the `CompletedCheckpoint` is subsumed. Under current settings,
the `discardState()` is supposed to delete only those unshared objects, and the shared objects
are deleted by the `StateRegistry`.  Hence, we must register those state handles once they
are received  so that their shared objects can be correctly deleted.

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