amazon web services - ERROR de chispa extraño en AWS EMR

amazon-web-services apache-spark

Question

Tengo un script PySpark realmente simple que crea un marco de datos a partir de algunos datos de parquet en S3 y luego el método de count() llamadas count() e imprime el número de registros.

Ejecuto el script en el clúster de AWS EMR y veo la siguiente información WARN extraña:

17/12/04 14:20:26 WARN ServletHandler:
javax.servlet.ServletException: java.util.NoSuchElementException: None.get
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:489)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228)
at org.spark_project.jetty.servlet.ServletHolder.handle(ServletHolder.java:845)
at org.spark_project.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1689)
at org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter.doFilter(AmIpFilter.java:164)
at org.spark_project.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
at org.spark_project.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
at org.spark_project.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
at org.spark_project.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
at org.spark_project.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
at org.spark_project.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.spark_project.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:461)
at org.spark_project.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
at org.spark_project.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
at org.spark_project.jetty.server.Server.handle(Server.java:524)
at org.spark_project.jetty.server.HttpChannel.handle(HttpChannel.java:319)
at org.spark_project.jetty.server.HttpConnection.onFillable(HttpConnection.java:253)
at org.spark_project.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
at org.spark_project.jetty.io.FillInterest.fillable(FillInterest.java:95)
at org.spark_project.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.spark_project.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.spark_project.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.util.NoSuchElementException: None.get
at scala.None$.get(Option.scala:347)
at scala.None$.get(Option.scala:345)
at org.apache.spark.status.api.v1.MetricHelper.submetricQuantiles(AllStagesResource.scala:313)
at org.apache.spark.status.api.v1.AllStagesResource$$anon$1.build(AllStagesResource.scala:178)
at org.apache.spark.status.api.v1.AllStagesResource$.taskMetricDistributions(AllStagesResource.scala:181)
at org.apache.spark.status.api.v1.OneStageResource$$anonfun$taskSummary$1.apply(OneStageResource.scala:71)
at org.apache.spark.status.api.v1.OneStageResource$$anonfun$taskSummary$1.apply(OneStageResource.scala:62)
at org.apache.spark.status.api.v1.OneStageResource$$anonfun$withStageAttempt$1.apply(OneStageResource.scala:130)
at org.apache.spark.status.api.v1.OneStageResource$$anonfun$withStageAttempt$1.apply(OneStageResource.scala:126)
at org.apache.spark.status.api.v1.OneStageResource.withStage(OneStageResource.scala:97)
at org.apache.spark.status.api.v1.OneStageResource.withStageAttempt(OneStageResource.scala:126)
at org.apache.spark.status.api.v1.OneStageResource.taskSummary(OneStageResource.scala:62)
at sun.reflect.GeneratedMethodAccessor153.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473)
... 28 more
17/12/04 14:20:26 WARN HttpChannel: //ip-172-31-81-10.ec2.internal:4040/api/v1/applications/application_1512395256824_0002/stages/3/0/taskSummary?proxyapproved=true
javax.servlet.ServletException: java.util.NoSuchElementException: None.get
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:489)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228)
at org.spark_project.jetty.servlet.ServletHolder.handle(ServletHolder.java:845)
at org.spark_project.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1689)
at org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter.doFilter(AmIpFilter.java:164)
at org.spark_project.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
at org.spark_project.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
at org.spark_project.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
at org.spark_project.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
at org.spark_project.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
at org.spark_project.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.spark_project.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:461)
at org.spark_project.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
at org.spark_project.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
at org.spark_project.jetty.server.Server.handle(Server.java:524)
at org.spark_project.jetty.server.HttpChannel.handle(HttpChannel.java:319)
at org.spark_project.jetty.server.HttpConnection.onFillable(HttpConnection.java:253)
at org.spark_project.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
at org.spark_project.jetty.io.FillInterest.fillable(FillInterest.java:95)
at org.spark_project.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.spark_project.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.spark_project.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.util.NoSuchElementException: None.get
at scala.None$.get(Option.scala:347)
at scala.None$.get(Option.scala:345)
at org.apache.spark.status.api.v1.MetricHelper.submetricQuantiles(AllStagesResource.scala:313)
at org.apache.spark.status.api.v1.AllStagesResource$$anon$1.build(AllStagesResource.scala:178)
at org.apache.spark.status.api.v1.AllStagesResource$.taskMetricDistributions(AllStagesResource.scala:181)
at org.apache.spark.status.api.v1.OneStageResource$$anonfun$taskSummary$1.apply(OneStageResource.scala:71)
at org.apache.spark.status.api.v1.OneStageResource$$anonfun$taskSummary$1.apply(OneStageResource.scala:62)
at org.apache.spark.status.api.v1.OneStageResource$$anonfun$withStageAttempt$1.apply(OneStageResource.scala:130)
at org.apache.spark.status.api.v1.OneStageResource$$anonfun$withStageAttempt$1.apply(OneStageResource.scala:126)
at org.apache.spark.status.api.v1.OneStageResource.withStage(OneStageResource.scala:97)
at org.apache.spark.status.api.v1.OneStageResource.withStageAttempt(OneStageResource.scala:126)
at org.apache.spark.status.api.v1.OneStageResource.taskSummary(OneStageResource.scala:62)
at sun.reflect.GeneratedMethodAccessor153.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473)

Aunque parece que no falla el trabajo. Tengo el recuento devuelto con éxito.

Solo me pregunto si alguien sabe por qué sucede esto y cómo deshacerse de él.

Gracias

Answer 1

Esos mensajes de advertencia se pueden suprimir agregando las siguientes líneas a /etc/spark/conf/log4j.properties :

log4j.logger.org.spark_project.jetty.server.HttpChannel=ERROR
log4j.logger.org.spark_project.jetty.servlet.ServletHandler=ERROR

No vi ningún impacto en el rendimiento ni en la estabilidad laboral. Ahora mis registros son muy legibles :)

Answer 2

Para aquellos que usan AWS EMR con Spark, también recibí el mismo mensaje de error al ejecutar mis trabajos de Spark en

• emr-5.10.0
• emr-5.11.0
• emr-5.11.1
• emr-5.12.0

Simplemente degradar a emr-5.9.0 te ayudará a resolver este problema.

Espero eso ayude.