Kostas Kloudas created FLINK-5264:
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Summary: Improve error message when assigning uid to intermediate
operator.
Key: FLINK-5264
URL: https://issues.apache.org/jira/browse/FLINK-5264
Project: Flink
Issue Type: Bug
Affects Versions: 1.1.3
Reporter: Kostas Kloudas
Priority: Blocker
Fix For: 1.2.0
Currently when trying to assign uid to an intermediate operator in a chain, the
error message just says that it is not the right place, without any further
information.
We could improve the message by telling explicitly to the user on which
operator to assign the uid.
To take it one step further, I would also suggest to always ask the user to set
a uid whenever possible, even if he did not try to set it.
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