Github user prabeesh commented on a diff in the pull request:
https://github.com/apache/spark/pull/4229#discussion_r35490561
--- Diff: examples/src/main/python/streaming/mqtt_wordcount.py ---
@@ -0,0 +1,57 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+ A sample wordcount with MqttStream stream
+ Usage: mqtt_wordcount.py <broker url> <topic>
+ To work with Mqtt, Mqtt Message broker/server required.
+ Mosquitto (http://mosquitto.org/) is an open source Mqtt Broker
+ In ubuntu mosquitto can be installed using the command `$ sudo apt-get
install mosquitto`
+ Run Mqtt publisher as
+ `$ bin/run-example \
+ org.apache.spark.examples.streaming.MQTTPublisher
tcp://localhost:1883 foo`
--- End diff --
@zsxwing / @tdas, the publisher here is the Scala publisher in the MQTT
Scala word count example. Should we keep this here or we should update it to
general instruction to run MQTT publisher.
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