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Posts: 21
Registered: ‎02-08-2016

How to restart spark streaming

Hello There,

 

Can anyone please let me know how can i restart spark streaming. 

 

Below code for stop the streaming 

 

ssc.stop(stopSparkContext = false, stopGracefully = true)

 

and again when i try to start it . it is giving me bellow error 

java.lang.IllegalStateException: Adding new inputs, transformations, and output operations after stopping a context is not supported
	at org.apache.spark.streaming.dstream.DStream.validateAtInit(DStream.scala:224) ~[spark-streaming_2.11-1.4.1.jar:1.4.1]
	at org.apache.spark.streaming.dstream.DStream.<init>(DStream.scala:64) ~[spark-streaming_2.11-1.4.1.jar:1.4.1]
	at org.apache.spark.streaming.dstream.InputDStream.<init>(InputDStream.scala:41) ~[spark-streaming_2.11-1.4.1.jar:1.4.1]
	at org.apache.spark.streaming.dstream.ReceiverInputDStream.<init>(ReceiverInputDStream.scala:41) ~[spark-streaming_2.11-1.4.1.jar:1.4.1]
	at org.apache.spark.streaming.twitter.TwitterInputDStream.<init>(TwitterInputDStream.scala:46) ~[spark-streaming-twitter_2.11-1.4.1.jar:1.4.1]
	at org.apache.spark.streaming.twitter.TwitterUtils$.createStream(TwitterUtils.scala:44) ~[spark-streaming-twitter_2.11-1.4.1.jar:1.4.1]
	at org.sach.KibanaElasticSearch.TwitterTransmitter$.Fetchallinfo(TwitterTransmitter.scala:39) ~[classes/:na]
	at org.sach.KibanaElasticSearch.CallServlet.doPost(CallServlet.java:58) ~[classes/:na]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) ~[servlet-api.jar:na]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[servlet-api.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) ~[catalina.jar:8.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[catalina.jar:8.0.37]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-websocket.jar:8.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[catalina.jar:8.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[catalina.jar:8.0.37]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) ~[catalina.jar:8.0.37]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [catalina.jar:8.0.37]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [catalina.jar:8.0.37]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [catalina.jar:8.0.37]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [catalina.jar:8.0.37]
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) [catalina.jar:8.0.37]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [catalina.jar:8.0.37]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) [catalina.jar:8.0.37]
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100) [tomcat-coyote.jar:8.0.37]
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687) [tomcat-coyote.jar:8.0.37]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) [tomcat-coyote.jar:8.0.37]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) [tomcat-coyote.jar:8.0.37]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_65]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_65]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.0.37]
	at java.lang.Thread.run(Thread.java:745) [na:1.8.0_65]
Cloudera Employee
Posts: 97
Registered: ‎05-10-2016

Re: How to restart spark streaming

You are currently unable to restart a streaming context after it has been stopped.  You can instead create a new streaming context or you can restart the entire application.  You can also enable checkpointing and start the context from the checkpoints to recover from any unclean stops: http://spark.apache.org/docs/latest/streaming-programming-guide.html#checkpointing