Github user mbalassi commented on a diff in the pull request:
https://github.com/apache/flink/pull/804#discussion_r31912276
--- Diff:
flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java
---
@@ -412,7 +412,7 @@ public void registerType(Class<?> type) {
if (from > to) {
throw new IllegalArgumentException("Start of sequence
must not be greater than the end");
}
- return fromCollection(new NumberSequenceIterator(from, to),
BasicTypeInfo.LONG_TYPE_INFO, "Sequence Source");
+ return addSource(new StatefulSequenceSource(from, to),
"Sequence Source").setParallelism(1);
}
--- End diff --
The current behaviour was that if the user tried setting at least two as
parallelism then the stream graph generator throw an exception on execute,
telling the user that this is in fact not a parallel source.
If we enable setting it the way you proposed than it is not much use the
having a separate `generateSequence` and a `generateParallelSequence`.
Personally I am not a big fan of the distinction, but if it is there let us do
it right. Are the batch versions different?
This is not a release blocker though, a JIRA for 0.10 is an OK solution on
my side.
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