Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/966#discussion_r36357066
--- Diff:
flink-core/src/main/java/org/apache/flink/api/common/io/ReplicatingInputFormat.java
---
@@ -59,7 +60,7 @@
* @see org.apache.flink.api.common.operators.base.FilterOperatorBase
* @see org.apache.flink.api.common.operators.base.MapPartitionOperatorBase
*/
-public final class ReplicatingInputFormat<OT, S extends InputSplit>
implements InputFormat<OT, S> {
+public final class ReplicatingInputFormat<OT, S extends InputSplit>
extends RichInputFormat<OT, S> {
--- End diff --
The `ReplicatingInputFormat` can wrap any kind of `InputFormat` (with or
without RuntimeContext).
Therefore, it needs to extend `RichInputFormat` but overwrite the
`setRuntimeContext()` method and forward the context to its wrapped IF, if this
is also a `RichInputFormat`.
Please check the updated JavaDocs as well. The wrapped IF does not need to
be rich.
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