Github user darionyaphet commented on a diff in the pull request:
https://github.com/apache/storm/pull/1515#discussion_r68347350
--- Diff: storm-core/src/jvm/org/apache/storm/topology/TopologyBuilder.java
---
@@ -113,6 +113,15 @@ public StormTopology createTopology() {
Map<String, Bolt> boltSpecs = new HashMap<>();
Map<String, SpoutSpec> spoutSpecs = new HashMap<>();
maybeAddCheckpointSpout();
+
+ if (_spouts.size() == 0) {
+ throw new IllegalArgumentException("Spouts is not set");
+ }
+
+ if (_bolts.size() == 0) {
--- End diff --
only have spout and don't have bolt is a strange use case . In my mine
spout should just read message into topology , any other operation should move
into bolts .
I have remove the check of `_bolts.size()` .
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