Ops Manager发生错误（NullPointerException）

Question

com.xgen.svc.core.svc.SvcException: We're sorry, an unexpected error has occurred
at com.xgen.svc.mms.svc.explorer.DataExplorerSvc.submitRequest(DataExplorerSvc.java:384)
at com.xgen.svc.mms.res.DataExplorerResource.submitDataExplorerRequest(DataExplorerResource.java:283)
at com.xgen.svc.mms.res.DataExplorerResource_$$_jvst4b4_12._d77submitDataExplorerRequest(DataExplorerResource_$$_jvst4b4_12.java)
at sun.reflect.GeneratedMethodAccessor270.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.glassfish.hk2.utilities.reflection.ReflectionHelper.invoke(ReflectionHelper.java:1287)
at org.jvnet.hk2.internal.MethodInterceptorHandler$MethodInvocationImpl.proceed(MethodInterceptorHandler.java:188)
at com.xgen.svc.core.util.MethodCallStatsDImpl.invoke(MethodCallStatsDImpl.java:25)
at org.jvnet.hk2.internal.MethodInterceptorHandler.invoke(MethodInterceptorHandler.java:121)
at com.xgen.svc.mms.res.DataExplorerResource_$$_jvst4b4_12.submitDataExplorerRequest(DataExplorerResource_$$_jvst4b4_12.java)
at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Caused by: java.lang.NullPointerException: null
at com.xgen.svc.mms.svc.explorer.DataExplorerSvc.getHostPortAliasedIfNecessary(DataExplorerSvc.java:457)
at com.xgen.svc.mms.svc.explorer.DataExplorerSvc.submitRequest(DataExplorerSvc.java:299)