Oracle Application Server Control 10g Returns Error "java.lang.NoClassDefFoundError" or Shows Partially Built Topology Page after Login
(Doc ID 423336.1)
Last updated on AUGUST 10, 2020
Applies to:Enterprise Manager for Fusion Middleware - Version 10.1.2.0.2 to 10.1.2.3.0
Information in this document applies to any platform.
Various symptoms can be experienced.
- After login to the Oracle Application Server AS ( EM ) Console only a partial page is shown. For example, only the AS Console banner and basic details are shown. Component information is missing.
- Accessing the AS Console returns error "java.lang.NoClassDefFoundError"
- http://host.domain:1810/emd/console/targets returns error:
An error has occurred!
IOException in sending Request :: Connection Refused
- Access AS Console from the AS Console belonging to another AS Instance in the Farm e.g. From Infrastructure tier's AS Console, click on the link to a middle tier affected by the issue. Following error maybe returned:
"An error was encountered while loading page. We were unable to find a target. This probably indicates a stale bookmark, or a configuration problem"
Other AS Console operations and some pages function normally.
emctl start iasconsole
emctl stop iasconsole
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