Github user uce commented on the issue:
https://github.com/apache/flink/pull/2194
After talking with @tillrohrmann and @StephanEwen, we discovered some
obvious cases where restoring from 1.0 savepoints won't work in 1.1, for
example if window state is involved, which is serialized in a different format
since 1.0. I think the same is true for RocksDB.
Should we by default throw an Exception when a user tries to restore a
Flink 1.0 savepoint with 1.1? On the other hand, there are cases where it
would work as expected... but if it does not work the error message will not be
very helpful.
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