我有一个非常简单的PySpark脚本,它从S3上的一些拼花数据创建一个数据帧,然后调用count()方法并打印出记录数.
我在AWS EMR集群上运行脚本,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$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) …