Hello! I'm currently using Apache Storm 0.9.4 and have question about thread-safety of *SpoutOutputCollector*. Is it safe to call *emit *method from different threads? In documentation (http://storm.apache.org/documentation/Concepts.html) it is said that *OutputCollector *is not thread-safe, and all emits, acks, and fails must happen on the same thread. But in Javadoc ( https://storm.apache.org/apidocs/backtype/storm/spout/ISpout.html) it is said that *SpoutOutputCollector* is thread-safe and should be saved as an instance variable of this spout object. Please, provide a little bit more details about thread-safety of *SpoutOutputCollector* and validity of calling *emit *method from different threads.
Thanks. Best regards, Evgeniy
