Database Reference
In-Depth Information
Application issues
Always look at the logfiles for identifying the error messages. Logfiles should be ob-
served to identify issues and error messages to identify the root cause. Use the logfile
status as info for collecting more data. You must know the location of all the logfiles.
You have domain, managed server, application, and container and JVM logs to help
for troubleshooting.
Some of the most re-occurring issues with SOA Suite application are as follows:
•
ClassNotFoundException errors
: This can be caused by either filesys-
tem corruption or if one fails to load the jar needed for newly-added fea-
tures for your SOA composite application. In the case of filesystem corrup-
tions, restore it from the backup or perform a green field install. On the oth-
er hand, while adding new features simply ensure that you got all the jar
libraries needed with this release. Usually, if the deployment steps failed to
mention all the jar files added during the design and development it gets
caught while deploying in the QA and staging environments following the
deployment steps document provided.
•
FileNotFoundException
: The application runtime expects a file or direct-
ory structure available to read and/or write configuration and application
data files. Ensure that the file and directory structure is available for the
application servers running the application and the user running the ap-
plication servers have the right filesystem permissions to read and/or write
files.
•
Too many open files
: The default OS settings especially for any Unix-
flavored operating systems including Linux. This is a common error for a
high traffic Oracle SOA application platform. Update
ulimit
, also known
as file pointers setting on the system level and for the user running the ap-
plication server's JVM. In our case, it is the WebLogic user. The following
Linux command provides details of soft and hard file descriptor limits:
$ ulimit -Sn -Hn
The
ulimit -Hn
command shows the hard limit and
-Sn
shows the soft
limit.
