Hi, I am using zeppelin since 2 months and today i restart service. Now i can't acces to zeppelin web UI. I am using HDP 2.5.0 and ambari 2.4.1. i have this log Thanks for how i can resolve that! INFO [2017-04-20 16:10:53,218] ({main} StdSchedulerFactory.java[instantiate]:1339) - Quartz scheduler 'DefaultQuartzScheduler' initialized from default resource file in Quartz package: 'quartz.properties' 444 INFO [2017-04-20 16:10:53,218] ({main} StdSchedulerFactory.java[instantiate]:1343) - Quartz scheduler version: 2.2.1 445 INFO [2017-04-20 16:10:53,218] ({main} QuartzScheduler.java[start]:575) - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED star ted. 446 WARN [2017-04-20 16:10:53,905] ({main} ContextHandler.java[log]:2062) - unavailable 447 javax.servlet.ServletException: Resource class org.apache.zeppelin.server.ZeppelinServer can not be instantiated due to Invocati onTargetException 448 at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createSingletonInstance(CXFNonSpringJaxrsServlet.java:396) 449 at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createApplicationInstance(CXFNonSpringJaxrsServlet.java:454) 450 at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createServerFromApplication(CXFNonSpringJaxrsServlet.java:432) 451 at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.init(CXFNonSpringJaxrsServlet.java:93) 452 at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:616) 453 at org.eclipse.jetty.servlet.ServletHolder.initialize(ServletHolder.java:396) 454 at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:871) 455 at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:298) 456 at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1349) 457 at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342) 458 at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741) 459 at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505) 460 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) 461 at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) 462 at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) 463 at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) 464 at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:163) 465 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) 466 at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) 467 at org.eclipse.jetty.server.Server.start(Server.java:387) 468 at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) 469 at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) 470 at org.eclipse.jetty.server.Server.doStart(Server.java:354) 471 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) 472 at org.apache.zeppelin.server.ZeppelinServer.main(ZeppelinServer.java:116) 473 WARN [2017-04-20 16:10:54,595] ({main} WebAppContext.java[doStart]:514) - Failed startup of context o.e.j.w.WebAppContext@7bb58 ca3{/,file:/hadoop/usr/hdp/2.5.0.0-1245/zeppelin/webapps/webapp/,STARTING}{/usr/hdp/current/zeppelin-server/lib/zeppelin-web-0.6 .0.2.5.0.0-1245.war} 474 javax.servlet.ServletException: Resource class org.apache.zeppelin.server.ZeppelinServer can not be instantiated due to Invocati onTargetException at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createSingletonInstance(CXFNonSpringJaxrsServlet.java:396) 476 at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createApplicationInstance(CXFNonSpringJaxrsServlet.java:454) 477 at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createServerFromApplication(CXFNonSpringJaxrsServlet.java:432) 478 at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.init(CXFNonSpringJaxrsServlet.java:93) 479 at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:616) 480 at org.eclipse.jetty.servlet.ServletHolder.initialize(ServletHolder.java:396) 481 at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:871) 482 at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:298) 483 at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1349) 484 at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342) 485 at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741) 486 at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505) 487 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) 488 at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) 489 at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) 490 at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) 491 at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:163) 492 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) 493 at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) 494 at org.eclipse.jetty.server.Server.start(Server.java:387) 495 at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) 496 at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) 497 at org.eclipse.jetty.server.Server.doStart(Server.java:354) 498 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) 499 at org.apache.zeppelin.server.ZeppelinServer.main(ZeppelinServer.java:116) 500 INFO [2017-04-20 16:10:54,604] ({main} AbstractConnector.java[doStart]:266) - Started ServerConnector@2227a6c1{HTTP/1.1}{0.0.0. 0:9995} 501 INFO [2017-04-20 16:10:54,604] ({main} Server.java[doStart]:379) - Started @2817ms 502 INFO [2017-04-20 16:10:54,605] ({main} ZeppelinServer.java[main]:121) - Done, zeppelin server started 503 INFO [2017-04-20 16:11:04,038] ({Thread-11} DependencyResolver.java[load]:100) - copy /home/grpis/j078180/spark-highcharts-0.6. 4.jar to /usr/hdp/current/zeppelin-server/local-repo/2CE6YB1QE 504 INFO [2017-04-20 16:24:43,024] ({Thread-18} ZeppelinServer.java[run]:125) - Shutting down Zeppelin Server ... 505 INFO [2017-04-20 16:24:43,029] ({Thread-18} AbstractConnector.java[doStop]:306) - Stopped ServerConnector@2227a6c1{HTTP/1.1}{0. 0.0.0:9995} 506 INFO [2017-04-20 16:24:43,035] ({Thread-18} ContextHandler.java[log]:2052) - Cleaning up Shiro Environment ... 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