Github user clockfly commented on a diff in the pull request:
https://github.com/apache/storm/pull/268#discussion_r19519682
--- Diff: storm-core/src/clj/backtype/storm/daemon/worker.clj ---
@@ -378,9 +392,15 @@
_ (refresh-connections nil)
_ (refresh-storm-active worker nil)
+
+ receive-thread-shutdown (launch-receive-thread worker)
+
+ ;; make sure all messaging connections are ready for sending data,
the netty messaging
+ ;; client will drop the messages if client.send(msg) is called
before the connection
+ ;; is established.
+ _ (wait-messaging-connections-to-be-ready worker)
--- End diff --
The wait here is to solve a corner case.
When the topology boots up. Previsous approach will start spout
immediately, which will use the IConnection layer before the IConnection is
available.
The wait-messaging-connections-to-be-ready is to ensure that the connection
layer is ready before starting spout.
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