[ACCUMULO-4760] NPE on server side getting replication information for monitor

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: monitor
• Labels: newbie
• Assignee: Michael Miller
• Reporter: Christopher Tubbs
• Created: 08/Dec/17 19:38
• Updated: 08/Jan/18 17:57
• Resolved: 08/Jan/18 17:57

Description

Without actually setting up replication, I tried looking at http://localhost:9995/replication in the monitor with the replication table both online and offline. Both seemed to have the same problem, resulting in a server-side HTTP 500 error on http://localhost:9995/rest/replication

017-12-08 14:34:21,661 [servlet.ServletHandler] WARN : 
javax.servlet.ServletException: java.lang.NullPointerException
	at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:489)
	at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:848)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:584)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
	at org.eclipse.jetty.server.Server.handle(Server.java:534)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:333)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108)
	at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
	at org.apache.accumulo.core.client.impl.Tables.getZooCache(Tables.java:52)
	at org.apache.accumulo.core.client.impl.Tables.getAllTables(Tables.java:238)
	at org.apache.accumulo.core.client.impl.Tables.getNameToIdMap(Tables.java:279)
	at org.apache.accumulo.monitor.rest.replication.ReplicationResource.getReplicationInformation(ReplicationResource.java:114)
	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 org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
	at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
	at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
	at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
	at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
	at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
	at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
	at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
	at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473)
	... 27 more