Github user f1yegor commented on the issue:
https://github.com/apache/flink/pull/1771
Looking at the code of `CassandraSinkBase` I assume that every new sink
will create own session to the cluster.
I'm creating arount 1000 streams and sinks for them, so cassandra cluster
would be saturated with openning connections.
Cassandra session could manage several connections via one session.
Could you confirm that this isn't an issue with the implementation?
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