Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/storm/pull/2233#discussion_r130429097
--- Diff: storm-client/src/jvm/org/apache/storm/streams/PairStream.java ---
@@ -380,6 +383,25 @@
return partitionBy(KEY).updateStateByKeyPartition(stateUpdater);
}
+ /**
+ * group the values of this stream with the values having the same key
from the other stream.
+ * <p>
+ * Note: The parallelism of this stream is carried forward to the
joined stream.
--- End diff --
carried forward to the co-grouped stream.
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