Is any solution for this error ? . I too stuck on this to connect spark job logs and analyze ERROR [dr-el-executor-thread-1] com.linkedin.drelephant.ElephantRunner : java.security.PrivilegedActionException: java.net.ConnectExcept ion: Connection refused at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:360) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1689) at com.linkedin.drelephant.security.HadoopSecurity.doAs(HadoopSecurity.java:108) at org.apache.spark.deploy.history.SparkFSFetcher.doAsPrivilegedAction(SparkFSFetcher.scala:78) at org.apache.spark.deploy.history.SparkFSFetcher.fetchData(SparkFSFetcher.scala:74) at com.linkedin.drelephant.spark.fetchers.FSFetcher.fetchData(FSFetcher.scala:34) at com.linkedin.drelephant.spark.fetchers.FSFetcher.fetchData(FSFetcher.scala:29) at com.linkedin.drelephant.analysis.AnalyticJob.getAnalysis(AnalyticJob.java:233) at com.linkedin.drelephant.ElephantRunner$ExecutorJob.run(ElephantRunner.java:177) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at sun.net.NetworkClient.doConnect(NetworkClient.java:175) at sun.net.www.http.HttpClient.openServer(HttpClient.java:432) at sun.net.www.http.HttpClient.openServer(HttpClient.java:527) at sun.net.www.http.HttpClient.<init>(HttpClient.java:211) at sun.net.www.http.HttpClient.New(HttpClient.java:308) at sun.net.www.http.HttpClient.New(HttpClient.java:326) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169) at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933) ... View more

Looks like the Kerberos user is not passed as expected to fetch the spark log streams . , is doAs method not taking the given principle information in elephant.conf as proxy user is the cause? def fetchData(analyticJob: AnalyticJob): SparkApplicationData = { val appId = analyticJob.getAppId() doAsPrivilegedAction { () => doFetchData(appId) } } protected def doAsPrivilegedAction[T](action: () => T): T = security.doAs[T](new PrivilegedAction[T] { override def run(): T = action() }) ... View more

swebhdfs support not yet enabled with Knox ? ... View more