Http Status 500 - Internal Server Error - Alert Agent on Enterprise Manager (Doc ID 1025240.1)

Last updated on AUGUST 10, 2017

Applies to:

Oracle Java CAPS - Version 5.1.0 and later
Information in this document applies to any platform.
Checked for relevance on 14-FEB-2011
***Checked for relevance on 02-October-2014***

Symptoms

After installing Enterprise Manager Alert Agent plugin, and clicking on Alert Agent item in the console tree, we receive the following error:

HTTP Status 500 - Internal Server Error
The server encountered an unexpected condition which prevented it from fulfilling the request.

Also received this error when trying to access the same from a different machine:
type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

java.lang.NullPointerException
at eManager.login_jsp._jspService(Unknown Source)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:254)

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms