In some cases, the message is very clear about what is wrong and what needs to be done, if anything, to fix it. For example, if you start a domain using the asadmin start-domain command, then inadvertently issue the same command again after the domain has started, the following message is displayed:
userD:\\Sun\\studio5_se\\appserver8\\bin\>asadmin start-domain Domain already started : domain1 Domain domain1 Started.
In this case, the message gives clear guidance and the problem can be disregarded.
Sometimes an error message gives only general information about the problem or solution, or suggests multiple possibilities. For example:
[16/Jun/2003:22:20:50] SEVERE ( 2204): WEB0200: Configuration error in web module [JAXBProjectStudio] (while initializing virtual server [server1]) com.iplanet.ias.config.ConfigException: Failed to load deployment descriptor for: JAXBProjectStudio cause: java.io.FileNotFoundException:
In this case, the problem is not obvious, or there might be multiple things wrong. You might have to consider various possibilities and perhaps a number of solutions. If the proposed fix is time consuming or costly, take steps to ensure that the fix is likely to be correct before actually doing anything.
Some error messages are either not helpful or provide little guidance; for example:
[23/Jun/2003:16:50:45] WARNING ( 1972): for host 127.0.0.1 trying to GET /SupplierServiceClient1/SupplierServiceClient1_SOAP.html, send-file reports: HTTP4144: error sending D:/Sun/studio5_se/appserver8/domains/ domain1/server1/applications/j2ee-modules/SupplierServiceClient1_1/ SupplierServiceClient1_SOAP.html (Overlapped I/O operation is in progress.) status=1:5
In this case, there is very little information to go on. It is especially important to identify the exact situation that caused the error, and what the symptoms are before proceeding.
For descriptions of all the Application Server error messages, refer to the Sun Java System Application Server 9.1 Error Message Reference.