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https://issues.apache.org/jira/browse/FLINK-5527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834715#comment-15834715
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ASF GitHub Bot commented on FLINK-5527:
---------------------------------------
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/3193
[FLINK-5527][query] querying a non-existing key is inconsistent among state
backends
Querying for a non-existing key for a state that has a default value set
currently results in an UnknownKeyOrNamespace exception when the
MemoryStateBackend or FsStateBackend is used but results in the default
value
if RocksDBStateBackend is set.
This removes the special handling from the RocksDBStateBackend and makes it
consistent with the other two back-ends, i.e. returning null which results
in the mentioned UnknownKeyOrNamespace exception.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/NicoK/flink flink-5613
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3193.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3193
----
commit a767d4ec9e855558c39d3902fc633b331fb64163
Author: Nico Kruber <[email protected]>
Date: 2017-01-17T13:26:16Z
[FLINK-5527][query] querying a non-existing key is inconsistent among state
backends
Querying for a non-existing key for a state that has a default value set
currently results in an UnknownKeyOrNamespace exception when the
MemoryStateBackend or FsStateBackend is used but results in the default
value
if RocksDBStateBackend is set.
This removes the special handling from the RocksDBStateBackend and makes it
consistent with the other two back-ends, i.e. returning null which results
in the mentioned UnknownKeyOrNamespace exception.
----
> QueryableState: requesting a non-existing key in MemoryStateBackend or
> FsStateBackend does not return the default value
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-5527
> URL: https://issues.apache.org/jira/browse/FLINK-5527
> Project: Flink
> Issue Type: Improvement
> Components: Queryable State
> Affects Versions: 1.2.0
> Reporter: Nico Kruber
> Assignee: Nico Kruber
>
> Querying for a non-existing key for a state that has a default value set
> currently results in an UnknownKeyOrNamespace exception when the
> MemoryStateBackend or FsStateBackend is used. It should return the default
> value instead just like the RocksDBStateBackend.
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