AWS EMR 上的奇怪火花错误

Question

我有一个非常简单的 PySpark 脚本，它从 S3 上的一些镶木地板数据创建数据框，然后调用 count() 方法并打印出记录数。

我运行 AWS EMR 集群上的脚本，我看到以下奇怪的 WARN 信息：

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$ReadCallback.succeeded(AbstractConnection.java:273)
    at org.spark_project.jetty.io.FillInterest.fillable(FillInterest.java:95)
    at org.spark_project.jetty.io.SelectChannelEndPoint.run(SelectChannelEndPoint.java:93)
    at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
    at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
    at org.spark_project.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
    at org.spark_project.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
    at org.spark_project.jetty.util.thread.QueuedThreadPool.run(QueuedThreadPool.java:589)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.util.NoSuchElementException: None.get
    at scala.None$.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$$anon.build(AllStagesResource.scala:178)
    at org.apache.spark.status.api.v1.AllStagesResource$.taskMetricDistributions(AllStagesResource.scala:181)
    at org.apache.spark.status.api.v1.OneStageResource$$anonfun$taskSummary.apply(OneStageResource.scala:71)
    at org.apache.spark.status.api.v1.OneStageResource$$anonfun$taskSummary.apply(OneStageResource.scala:62)
    at org.apache.spark.status.api.v1.OneStageResource$$anonfun$withStageAttempt.apply(OneStageResource.scala:130)
    at org.apache.spark.status.api.v1.OneStageResource$$anonfun$withStageAttempt.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.invoke(ResourceMethodInvocationHandlerFactory.java:81)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.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.run(ServerRuntime.java:326)
    at org.glassfish.jersey.internal.Errors.call(Errors.java:271)
    at org.glassfish.jersey.internal.Errors.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.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.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.build(AllStagesResource.scala:178)
    at org.apache.spark.status.api.v1.AllStagesResource$.taskMetricDistributions(AllStagesResource.scala:181)
    at org.apache.spark.status.api.v1.OneStageResource$$anonfun$taskSummary.apply(OneStageResource.scala:71)
    at org.apache.spark.status.api.v1.OneStageResource$$anonfun$taskSummary.apply(OneStageResource.scala:62)
    at org.apache.spark.status.api.v1.OneStageResource$$anonfun$withStageAttempt.apply(OneStageResource.scala:130)
    at org.apache.spark.status.api.v1.OneStageResource$$anonfun$withStageAttempt.apply(OneStageResource.scala:126)
    at org.apache.spark.status.api.v1.OneStageResource.withStage(OneStageResource.scala:97)
    at org.apache.spark.status.api.v1.OneStageResource.withStageAttempt(OneStageResource.scala:126)
    at org.apache.spark.status.api.v1.OneStageResource.taskSummary(OneStageResource.scala:62)
    at sun.reflect.GeneratedMethodAccessor153.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.invoke(ResourceMethodInvocationHandlerFactory.java:81)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.run(AbstractJavaResourceMethodDispatcher.java:144)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$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.run(ServerRuntime.java:326)
    at org.glassfish.jersey.internal.Errors.call(Errors.java:271)
    at org.glassfish.jersey.internal.Errors.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)

虽然看起来它并没有失败。我成功返回了计数。

只是想知道是否有人知道为什么会发生这种情况以及如何摆脱它。

谢谢

Answer 1

可以通过将以下行添加到 /etc/spark/conf/log4j.properties 来抑制这些警告消息：

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

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

我没有发现对性能和工作稳定性有任何影响。现在我的日志可读性更强了:)

Answer 2

对于那些将 AWS EMR 与 Spark 结合使用的人，我在

中执行我的 Spark 作业时也收到了相同的错误消息

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

只需降级到emr-5.9.0即可帮助您解决此问题。

希望对您有所帮助。

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