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https://issues.apache.org/jira/browse/FLINK-3311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15296342#comment-15296342
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ASF GitHub Bot commented on FLINK-3311:
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Github user zentol commented on the pull request:
https://github.com/apache/flink/pull/1771#issuecomment-220975120
I finally was able to fix the restart issue. there were 2 massive bugs in
the CassandraCommitter:
- within open() the checkpoint entry was always overridden
- within close() the checkpoint entry was always deleted
in addition i have made the following changes:
- renamed GenericAtLeastOnceSink to GenericWriteAheadSink
- implemented a caching of the last committed checkpointID in the
CassandraCommitter
It's rather obvious that more tests are required.
> Add a connector for streaming data into Cassandra
> -------------------------------------------------
>
> Key: FLINK-3311
> URL: https://issues.apache.org/jira/browse/FLINK-3311
> Project: Flink
> Issue Type: New Feature
> Components: Streaming Connectors
> Reporter: Robert Metzger
> Assignee: Andrea Sella
>
> We had users in the past asking for a Flink+Cassandra integration.
> It seems that there is a well-developed java client for connecting into
> Cassandra: https://github.com/datastax/java-driver (ASL 2.0)
> There are also tutorials out there on how to start a local cassandra instance
> (for the tests):
> http://prettyprint.me/prettyprint.me/2010/02/14/running-cassandra-as-an-embedded-service/index.html
> For the data types, I think we should support TupleX types, and map standard
> java types to the respective cassandra types.
> In addition, it seems that there is a object mapper from datastax to store
> POJOs in Cassandra (there are annotations for defining the primary key and
> types)
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