@Beverley Andalora Thank you. This helped my case. I have provided the error which I receiving below (before making your recommended changes) as it may help others. java.lang.RuntimeException: org.apache.falcon.FalconException: java.lang.RuntimeException: GraphFactory could not instantiate this Graph implementation [com.thinkaurelius.titan.core.TitanFactory]. at org.apache.falcon.listener.ContextStartupListener.contextInitialized(ContextStartupListener.java:59) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:549) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.apache.falcon.util.EmbeddedServer.start(EmbeddedServer.java:58) at org.apache.falcon.FalconServer.main(FalconServer.java:118) Caused by: org.apache.falcon.FalconException: java.lang.RuntimeException: GraphFactory could not instantiate this Graph implementation [com.thinkaurelius.titan.core.TitanFactory]. at org.apache.falcon.service.ServiceInitializer.initialize(ServiceInitializer.java:50) at org.apache.falcon.listener.ContextStartupListener.contextInitialized(ContextStartupListener.java:56) ... 11 more Caused by: java.lang.RuntimeException: GraphFactory could not instantiate this Graph implementation [com.thinkaurelius.titan.core.TitanFactory]. at com.tinkerpop.blueprints.GraphFactory.open(GraphFactory.java:50) at org.apache.falcon.metadata.MetadataMappingService.initializeGraphDB(MetadataMappingService.java:146) at org.apache.falcon.metadata.MetadataMappingService.init(MetadataMappingService.java:113) at org.apache.falcon.service.ServiceInitializer.initialize(ServiceInitializer.java:47) ... 12 more Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.tinkerpop.blueprints.GraphFactory.open(GraphFactory.java:45) ... 15 more Caused by: java.lang.NoClassDefFoundError: com/sleepycat/je/LockMode at com.thinkaurelius.titan.diskstorage.berkeleyje.BerkeleyJEStoreManager.<clinit>(BerkeleyJEStoreManager.java:47) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:42) at com.thinkaurelius.titan.diskstorage.Backend.getImplementationClass(Backend.java:421) at com.thinkaurelius.titan.diskstorage.Backend.getStorageManager(Backend.java:361) at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1275) at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:93) at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:73) ... 20 more Caused by: java.lang.ClassNotFoundException: com.sleepycat.je.LockMode at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 29 more 2017-06-23 20:51:14,687 INFO - [main:] ~ Started SocketConnector@0.0.0.0:15000 (log:67) ... View more

Awesome. The referred Articles helped me solve my ambari-metrics restart issue. Here is the short form of the steps 1) Stop Ambari Metrics Collector and Grafana 2) Backup the embedded hbase and hbase-temp folders and deleted them. (The paths could differ from default. So I looked up the hbase.rootdir and hbase.tmp.dir properties in Ambari > Ambari Metrics > Config for the appropriate path) 3) Restart Ambari Metrics Collector and Grafana The Ambari Metrics Collector Started correctly without any errors. Note: As you may have suspected, by deleting the existing hbase folder, you will loose the metrics history. ... View more

Thank you  @Markovich. I have been looking for this fix for months. I even opened multiple tickets with Hortonworks but they were not very helpful. Finally, I can put this to rest.   Just to add more clarity, for HDP clusters the  hive.server2.parallel.ops.in.session=true  propery has to be added to hive-site.xml (if done manually) or at Hive > Config > Advanced > "Custom hive-site" section if done via Ambari.      ... View more

The workaround is to use SQLContext (instead of HiveContext) and JDBC to connect to HiveServer2 which will honor ranger's authorization policies. Following links will give you some idea about how Spark, JDBC and SQLContext works. http://stackoverflow.com/questions/32195946/method-not-supported-in-spark https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.4/bk_dataintegration/content/hive-jdbc-odbc-drivers.html ... View more

Awesome! This worked for me. The timing could have not been better. I was working on setting up Zeppelin with OpenLDAP and livy today (HDP 2.5) and this was one of the issue I had to solve. Thank you! ... View more

I tried running the command that @Terje Berg-Hansen suggested. I ran it as user "Zeppelin" on the node where Zeppelin is installed but it did not make any difference. Here is another thread that talks about the same topic. This issue is still unresolved. https://community.hortonworks.com/questions/58454/hdp-25-zeppelin-06-ldap-interpreters-are-not-shown.html ... View more

I had a similar issue where ambari server got stuck in a weird state. It was technically running but could not collect any stats from the agents and in-turn it showed that the nodes are not running on the UI. I spent couple of days looking for a solution. Then based on the suggestion by @CS User above, I took a leap of faith and deleted all requests and corresponding data on ambari schema. Upon restarting the ambari-server, everything came back to normal. Thank you for the tip. Error on ambar-server.log -------- 07 Nov 2016 19:09:56,536 ERROR [qtp-ambari-agent-253] ContainerResponse:419 - The RuntimeException could not be mapped to a response, re-throwing to the HTTP container java.lang.NullPointerException at java.lang.String.replace(String.java:2240) at org.apache.ambari.server.topology.HostRequest.getLogicalTasks(HostRequest.java:303) at org.apache.ambari.server.topology.LogicalRequest.getCommands(LogicalRequest.java:158) at org.apache.ambari.server.topology.LogicalRequest.getRequestStatus(LogicalRequest.java:231) at org.apache.ambari.server.topology.TopologyManager.isLogicalRequestFinished(TopologyManager.java:812) at org.apache.ambari.server.topology.TopologyManager.replayRequests(TopologyManager.java:766) at org.apache.ambari.server.topology.TopologyManager.ensureInitialized(TopologyManager.java:150) at org.apache.ambari.server.topology.TopologyManager.onHostRegistered(TopologyManager.java:407) at org.apache.ambari.server.state.host.HostImpl$HostRegistrationReceived.transition(HostImpl.java:313) at org.apache.ambari.server.state.host.HostImpl$HostRegistrationReceived.transition(HostImpl.java:275) at org.apache.ambari.server.state.fsm.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:354) at org.apache.ambari.server.state.fsm.StateMachineFactory.doTransition(StateMachineFactory.java:294) at org.apache.ambari.server.state.fsm.StateMachineFactory.access$300(StateMachineFactory.java:39) at org.apache.ambari.server.state.fsm.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:440) at org.apache.ambari.server.state.host.HostImpl.handleEvent(HostImpl.java:584) at org.apache.ambari.server.agent.HeartBeatHandler.handleRegistration(HeartBeatHandler.java:464) at org.apache.ambari.server.agent.rest.AgentResource.register(AgentResource.java:95) at sun.reflect.GeneratedMethodAccessor188.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185) at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409) at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1507) at org.apache.ambari.server.security.SecurityFilter.doFilter(SecurityFilter.java:67) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478) at org.apache.ambari.server.api.AmbariPersistFilter.doFilter(AmbariPersistFilter.java:47) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478) at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82) at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:294) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:427) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:370) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:984) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1045) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:236) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SslConnection.handle(SslConnection.java:196) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) at java.lang.Thread.run(Thread.java:745) -------- Error on ambari-agent: ----------- Unable to connect to: https://<ambari-server-fqdn>:8441/agent/v1/register/<ambari-agent-fqdn>; Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/ambari_agent/Controller.py", line 165, in registerWithServer ret = self.sendRequest(self.registerUrl, data) File "/usr/lib/python2.6/site-packages/ambari_agent/Controller.py", line 499, in sendRequest + '; Response: ' + str(response)) <head> <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"/> <title>Error 500 Server Error</title> </head> <body> <h2>HTTP ERROR: 500</h2> <p>Problem accessing /agent/v1/register/<ambari-agent-fqdn>. Reason: <pre> Server Error</pre></p> <hr /><i><small>Powered by Jetty:// 8.1.19.v20160209</small></i> ----------- Solution: Here is the (postgresql) query that I used. You have to run this as "ambari" user on the Ambari db. HDP version: 2.5 Ambari version: 2.4.0.1 Caution: Since you are touching ambari db directly, you are on your own. Note: I had to write individual queries to delete records from dependent tables first because CASCADE DELETE option was not turned on them. delete from execution_command where task_id in (select task_id from host_role_command where stage_id in (select stage_id from stage where request_id in (select request_id from request))); delete from topology_logical_task where physical_task_id in (select task_id from host_role_command where stage_id in (select stage_id from stage where request_id in (select request_id from request))); delete from host_role_command where stage_id in (select stage_id from stage where request_id in (select request_id from request)); delete from stage where request_id in (select request_id from request); delete from requestresourcefilter where request_id in (select request_id from request); delete from requestoperationlevel where request_id in (select request_id from request); delete from request; ... View more

Soft linking of hdfs and core site xmls on KNOX Gateway server fixed the UnknownHostException issue. The versions I was working with are HDP - 2.5 Ranger - 0.6.0.2.5 Knox - 0.9.0.2.5 Thanks ... View more