Issue description – When starting Ambari the Database explorer is unusable for 2 minutes until an error message appears " "Query timed out to fetch table description for user: XXXX"", then the user has to refresh the database explorer in order to get a database and table listing. This is an intermittent issue which gets resolved after refreshing or login in for the second time. Action steps – In order to resolve the issue ,we changed the ambari timeout properties but it didn't resolve the issue. agent.package.install.task.timeout=1800 agent.task.timeout=900 server.http.session.inactive_timeout=1800 server.task.timeout=1200 user.inactivity.timeout.default=900 user.inactivity.timeout.role.readonly.default=900 views.ambari.hive.Hive_view.result.fetch.timeout=6000000 views.ambari.hive.hive_instance_1_50.result.fetch.timeout=6000000 views.ambari.request.connect.timeout.millis=6000000 views.ambari.request.read.timeout.millis=6000000 PFA application logs and system configuration settings. ... View more

sparkui.png Were do I customize this property so that It can go to some custom URL?? ... View more

To enable user impersonation I have performed below steps: 1. Added below property inzeppelin_env_content through Ambari. export ZEPPELIN_IMPERSONATE_CMD='sudo -H -u ${ZEPPELIN_IMPERSONATE_USER} bash -c ' 2. Enable user impersonate in the sh interpreter. (The interpreter is set per user in isolated mode) Below is the log for the same. java.net.ConnectException: Connection refused (Connection refused) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at org.apache.thrift.transport.TSocket.open(TSocket.java:182) at org.apache.zeppelin.interpreter.remote.ClientFactory.create(ClientFactory.java:51) at org.apache.zeppelin.interpreter.remote.ClientFactory.create(ClientFactory.java:37) at org.apache.commons.pool2.BasePooledObjectFactory.makeObject(BasePooledObjectFactory.java:60) at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:861) at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435) at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363) at org.apache.zeppelin.interpreter.remote.RemoteInterpreterProcess.getClient(RemoteInterpreterProcess.java:90) at org.apache.zeppelin.interpreter.remote.RemoteInterpreter.init(RemoteInterpreter.java:211) at org.apache.zeppelin.interpreter.remote.RemoteInterpreter.getFormType(RemoteInterpreter.java:377) at org.apache.zeppelin.interpreter.LazyOpenInterpreter.getFormType(LazyOpenInterpreter.java:105) at org.apache.zeppelin.notebook.Paragraph.jobRun(Paragraph.java:387) at org.apache.zeppelin.scheduler.Job.run(Job.java:175) at org.apache.zeppelin.scheduler.RemoteScheduler$JobRunner.run(RemoteScheduler.java:329) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) 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) ... View more

I am trying to run a query using sparkR interpreter in Zeppelin. We have R installed on the namenode machine and Zeppelin installed on the other machine. So when we fire a query using sparkR interpreter it doesn'display any error on the zeppelin screen but when I see the interpreter logs it throws an error: zeppelin Caused by: java.io.IOException: Cannot run program "R" (in directory "."): error=2, No such file or directory . Do we need to install R on every node? ... View more