thanks a lot Terry
2016-07-26 12:03 GMT+08:00 Terry Hoo <hujie.ea...@gmail.com>:
> Kevin,
>
> Try to create the StreamingContext as following:
>
> val ssc = new StreamingContext(spark.sparkContext, Seconds(2))
>
>
>
> On Tue, Jul 26, 2016 at 11:25 AM, kevin <kiss.kevin...@gmail.com> wrote:
>
>> hi,all:
>> I want to read data from kafka and regist as a table then join a jdbc
>> table.
>> My sample like this :
>>
>> val spark = SparkSession
>> .builder
>> .config(sparkConf)
>> .getOrCreate()
>>
>> val jdbcDF = spark.read.format("jdbc").options(Map("url" ->
>> "jdbc:mysql://master1:3306/demo", "driver" -> "com.mysql.jdbc.Driver",
>> "dbtable" -> "i_user", "user" -> "root", "password" -> "passok")).load()
>> jdbcDF.cache().createOrReplaceTempView("black_book")
>> val df = spark.sql("select * from black_book")
>> df.show()
>>
>> val ssc = new StreamingContext(sparkConf, Seconds(2))
>> ssc.checkpoint("checkpoint")
>>
>> val topicMap = topics.split(",").map((_, numThreads.toInt)).toMap
>> val lines = KafkaUtils.createStream(ssc, zkQuorum, group,
>> topicMap).map(_._2)
>> val words = lines.flatMap(_.split(" "))
>>
>> *I got error :*
>>
>> 16/07/26 11:18:07 WARN AbstractHandler: No Server set for
>> org.spark_project.jetty.server.handler.ErrorHandler@6f0ca692
>> +--------------------+--------+--------+
>> | id|username|password|
>> +--------------------+--------+--------+
>> |e6faca36-8766-4dc...| a| a|
>> |699285a3-a108-457...| admin| 123|
>> |e734752d-ac98-483...| test| test|
>> |c0245226-128d-487...| test2| test2|
>> |4f1bbdb2-89d1-4cc...| 119| 911|
>> |16a9a360-13ee-4b5...| 1215| 1215|
>> |bf7d6a0d-2949-4c3...| demo3| demo3|
>> |de30747c-c466-404...| why| why|
>> |644741c9-8fd7-4a5...| scala| p|
>> |cda1e44d-af4b-461...| 123| 231|
>> |6e409ed9-c09b-4e7...| 798| 23|
>> +--------------------+--------+--------+
>>
>> Exception in thread "main" org.apache.spark.SparkException: Only one
>> SparkContext may be running in this JVM (see SPARK-2243). To ignore this
>> error, set spark.driver.allowMultipleContexts = true. The currently running
>> SparkContext was created at:
>>
>> org.apache.spark.sql.SparkSession$Builder.getOrCreate(SparkSession.scala:749)
>> main.POC$.main(POC.scala:43)
>> main.POC.main(POC.scala)
>> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> java.lang.reflect.Method.invoke(Method.java:498)
>>
>> org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:724)
>> org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
>> org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
>> org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:119)
>> org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
>> at
>> org.apache.spark.SparkContext$$anonfun$assertNoOtherContextIsRunning$2.apply(SparkContext.scala:2211)
>> at
>> org.apache.spark.SparkContext$$anonfun$assertNoOtherContextIsRunning$2.apply(SparkContext.scala:2207)
>> at scala.Option.foreach(Option.scala:257)
>> at
>> org.apache.spark.SparkContext$.assertNoOtherContextIsRunning(SparkContext.scala:2207)
>> at
>> org.apache.spark.SparkContext$.markPartiallyConstructed(SparkContext.scala:2277)
>> at org.apache.spark.SparkContext.<init>(SparkContext.scala:91)
>> at
>> org.apache.spark.streaming.StreamingContext$.createNewSparkContext(StreamingContext.scala:837)
>> at
>> org.apache.spark.streaming.StreamingContext.<init>(StreamingContext.scala:84)
>> at main.POC$.main(POC.scala:50)
>> at main.POC.main(POC.scala)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:498)
>> at
>> org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:724)
>> at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
>> at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
>> at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:119)
>> at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
>>
>>
>>
>
