Redhat – Weblogic takes time to startup

This is because you are executing this script. This means that a new shell process is being created, and the variables defined or modified have a scope only in that subshell. The parent process does not inherit child's environment.

Whenever you want to load an variables defined in a given file, you have to source it:

$ source file

or

$ . file

I have experienced the following when initialising the Security Realm specifically with 10.3.0.0 on linux hosts:

(Taken from Here Weblogic Starts Slow)

Turns out Weblogic uses random number generator during start up. Because of the bug in java it reads ‘randomness’ from /dev/random. /dev/random is very good random numbers generators but it is extremely slow. It takes sometimes 10 minutes or more to generate one number. /dev/urandom is not that good, but it is instant. Java somehow maps /dev/urandom file to /dev/random. That’s why default settings in $JAVA_HOME/jre/lib/security/java.security are useless.

One of the solutions from the same page:

...change $JAVA_HOME/jre/lib/security/java.security

Replace securerandom.source with

securerandom.source=file:/dev/./urandom

NOTICE: This approach may have security ramifications, but it may at least give you an explanation.