解决 Zeppelin .ZeppelinServer can not be instantiated due to InvocationTargetException

有一段时间不用Zeppelin ，突然使用普通用户启动 Zeppelin daemon 发现 UI不可用，其实是普通用户没有权限操作 /etc/zeppelin/conf/interpreter.json，使用 root 重启Zeppelin 即可
参考
https://community.hortonworks.com/questions/97593/zeppelin-web-ui-not-start.html
首先在 logs 日志查看到的报错信息
INFO [2018-03-30 11:58:35,512] ({main} InterpreterSettingManager.java[init]:337) - InterpreterSettingRef name kylin
 WARN [2018-03-30 11:58:35,543] ({main} ContextHandler.java[log]:2062) - unavailable
javax.servlet.ServletException: Resource class org.apache.zeppelin.server.ZeppelinServer can not be instantiated due to InvocationTargetException
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createSingletonInstance(CXFNonSpringJaxrsServlet.java:396)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createApplicationInstance(CXFNonSpringJaxrsServlet.java:454)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createServerFromApplication(CXFNonSpringJaxrsServlet.java:432)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.init(CXFNonSpringJaxrsServlet.java:93)
    at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:616)
    at org.eclipse.jetty.servlet.ServletHolder.initialize(ServletHolder.java:396)
    at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:871)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:298)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1349)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:163)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
    at org.eclipse.jetty.server.Server.start(Server.java:387)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
    at org.eclipse.jetty.server.Server.doStart(Server.java:354)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.apache.zeppelin.server.ZeppelinServer.main(ZeppelinServer.java:189)
 WARN [2018-03-30 11:58:37,274] ({main} WebAppContext.java[doStart]:514) - Failed startup of context o.e.j.w.WebAppContext@1ad282e0{/,file:/usr/local/zeppelin/webapps/webapp/,STARTING}{/usr/local/zeppelin/zeppelin-web-0.7.3.war}
javax.servlet.ServletException: Resource class org.apache.zeppelin.server.ZeppelinServer can not be instantiated due to InvocationTargetException
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createSingletonInstance(CXFNonSpringJaxrsServlet.java:396)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createApplicationInstance(CXFNonSpringJaxrsServlet.java:454)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.createServerFromApplication(CXFNonSpringJaxrsServlet.java:432)
    at org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet.init(CXFNonSpringJaxrsServlet.java:93)
    at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:616)
    at org.eclipse.jetty.servlet.ServletHolder.initialize(ServletHolder.java:396)
    at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:871)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:298)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1349)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:163)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
    at org.eclipse.jetty.server.Server.start(Server.java:387)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
    at org.eclipse.jetty.server.Server.doStart(Server.java:354)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.apache.zeppelin.server.ZeppelinServer.main(ZeppelinServer.java:189)
 INFO [2018-03-30 11:58:37,517] ({main} AbstractConnector.java[doStart]:266) - Started ServerConnector@29d37757{HTTP/1.1}{0.0.0.0:9960}
 INFO [2018-03-30 11:58:37,517] ({main} Server.java[doStart]:379) - Started @18121ms
 INFO [2018-03-30 11:58:37,5
再看 interpreter.json 的权限，确实只有 root 用户可以操作
image.png
如果想以后在普通用户启动 Zeppelin ，就修改一下 interpreter.json 的权限即可