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https://issues.apache.org/jira/browse/SPARK-30686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17027291#comment-17027291
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Behroz Sikander commented on SPARK-30686:
-----------------------------------------
Could it be linked to [https://github.com/apache/spark/pull/19748] ?
> Spark 2.4.4 metrics endpoint throwing error
> -------------------------------------------
>
> Key: SPARK-30686
> URL: https://issues.apache.org/jira/browse/SPARK-30686
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.4
> Reporter: Behroz Sikander
> Priority: Major
>
> I am using Spark-standalone in HA mode with zookeeper.
> Once the driver is up and running, whenever I try to access the metrics api
> using the following URL
> http://master_address/proxy/app-20200130041234-0123/api/v1/applications
> I get the following exception.
> It seems that the request never even reaches the spark code. It would be
> helpful if somebody can help me.
> {code:java}
> HTTP ERROR 500
> Problem accessing /api/v1/applications. Reason:
> Server Error
> Caused by:
> java.lang.NullPointerException: while trying to invoke the method
> org.glassfish.jersey.servlet.WebComponent.service(java.net.URI, java.net.URI,
> javax.servlet.http.HttpServletRequest,
> javax.servlet.http.HttpServletResponse) of a null object loaded from field
> org.glassfish.jersey.servlet.ServletContainer.webComponent of an object
> loaded from local variable 'this'
> 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:848)
> at
> org.spark_project.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:584)
> at
> org.spark_project.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
> at
> org.spark_project.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
> 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:493)
> 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:539)
> at
> org.spark_project.jetty.server.HttpChannel.handle(HttpChannel.java:333)
> at
> org.spark_project.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
> at
> org.spark_project.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
> at
> org.spark_project.jetty.io.FillInterest.fillable(FillInterest.java:108)
> 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:808)
> {code}
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