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The Connection Server (About)


The Connection Server is an informal blog about a range of professional server-related topics, with a focus on the everyday tasks of a corporate IT infrastructure administrator. Articles range from hard-core technical tips to more business-oriented discussions.
What technologies do I cover? Potentially anything used in the corporate IT world, but to name a few big ones:
  • Java (J2EE, J2SE and J2ME)
  • Oracle WebLogic (previously BEA WebLogic)
  • WebSphere and JBoss
  • Oracle DB
  • Apache and IIS
  • Windows, AIX, Solaris and Red Hat
Although a few articles are aimed at helping beginners become more advanced administrators
or developers, most articles assume at least a medium level of technical knowledge.

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Popular posts from this blog

BAD_CERTIFICATE - A corrupt or unuseable certificate...

This is a simple symptom-cause-solution blog entry only. I hope these blogs will help fellow administrators.
Symptom
In wls_utc, when trying to test a webservice using SSL, the following error message is received: javax.net.ssl.SSLKeyException: FATAL Alert:BAD_CERTIFICATE - A corrupt or unuseable certificate was received.
If SSL debugging is enabled, the following error also appears in the logs: ExecuteThread: '4' for queue: 'weblogic.kernel.Default (self-tuning)' <1254822672320>>
verification failed because RSA key public exponent [3] is too small
Cause
The certificate encryption is of a weaker strength than expected by newer versions of Java.
Solution
Add the flag "-Dweblogic.security.SSL.allowSmallRSAExponent=true" to the server startup parameters.
References


None.

Connection refused: No available router to destination

This is a simple symptom-cause-solution blog entry only. I hope these blogs will help fellow administrators.
Symptom

The following exception occurs in WebLogic server logs. Most likely to occur during WebLogic server start-up, but similar exceptions may occur at other times.
java.net.ConnectException: t3://myserver:8000: Destination unreachable; nested exception is: java.net.ConnectException: Connection refused: connect; No available router to destination] at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:49) at weblogic.jndi.WLInitialContextFactoryDelegate.toNamingException(WLInitialContextFactoryDelegate.java:773) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:363) at weblogic.jndi.Environment.getContext(Environment.java:307) at weblogic.jndi.Environment.getContext(Environment.java:277)
Cause
This message (Connection refused: connect; No available router to destination) is a kind of "catch…

BEASVC.EXE - WebLogic as a Windows Service

I remember the first time I had to work out why WebLogic wouldn't run as a service. It was a frustrating experience. There were no error messages. No Windows error dialog. No console output.

How do you troubleshoot something like this??!!

This short article will show you. For simplicity I'll talk about the node manager, but the same principles apply for running an admin or managed server as a service.

First Steps

First, you still have your server logs. Sure the console output is better, but it's a starting point. Check this log for errors and especially take note of the start up variables such as PATH and CLASSPATH. If the server log isn't being created, that tells you WebLogic probably isn't even being started. (Check that you have a license file if you haven't already.)

Ok, so the logs were no help. The next step is to look at how the service is trying to start WebLogic.

When you install WebLogic as a service, you're really setting up beasvc.exe as the service.…