Browser Hangs When Accessing OracleAS 10g Rel 2 Application Server Console On AIX (Doc ID 365725.1)

Last updated on FEBRUARY 15, 2017

Applies to:

Enterprise Manager for Fusion Middleware - Version 10.1.2.0.2 to 10.1.2.3.0
IBM AIX on POWER Systems (64-bit)
IBM AIX Based Systems (64-bit)
The issue and advice below is not applicable to OracleAS 10.1.3 AS Control


Checked for relevance on 29-Jan-2013


Symptoms

When accessing the OracleAS 10g Rel 2 AS Console the client browser hangs with:

- a blank screen

or

- 500 Internal Server Error

Servlet error: Error instantiating servlet 'console' (servlet class not found, make sure it exists at <oracle home>/sysman/webapps/emd/WEB-INF/classes/oracle/sysman/eml/app/Console.class, in a jar in <oracle home>/sysman/webapps/emd/WEB-INF/lib/, in an orion-web.xml specified classpath or global server classpath)

If a blank screen is shown, the following errors might be seen in $ORACLE_HOME/sysman/log/em-application.log:

java.lang.NoClassDefFoundError: oracle/sysman/eml/app/Console
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java(Compiled Code))
at com.evermind[Oracle Application Server Containers for J2EE 10g
(10.1.2.0.2)].server.http.HttpApplication.loadServlet(HttpApplication.java(Compiled Code))
at com.evermind[Oracle Application Server Containers for J2EE
10g(10.1.2.0.2)].server.http.HttpApplication.findServlet(HttpApplication.java(Compiled Code))

The following lines may be seen in $ORACLE_HOME/sysman/log/emdctl.trc:

... Thread-1 WARN http: snmehl_connect: connect failed to (server:port): A remote host refused an attempted connect operation. (error =79)
... Thread-1 WARN http: snmehl_connect: connect failed to (server:port): A remote host refused an attempted connect operation. (error =79)

Sometimes the browser hangs as soon as the AS Console url is entered. Other times the AS Console login appears and the browser hangs immediately after login.

The startup of AS Console from the command line - emctl start iasconsole - works fine

The problem reproduces no matter which browser (IE, Mozilla, Netscape etc) is used.

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