Description of problem:

The JBoss CLI contains a memory leak related to CLI Kerberos authentication.

The org.jboss.as.cli.impl.CommandContextImpl class calls the initJaasConfig() in its constructor, which adds a new JaasConfigurationWrapper instance to javax.security.auth.login.Configuration. It's done for every new CommandContext instance, so it consumes more and more memory. There is no cleanup for the registered configurations.

Moreover, the searches for appropriate login config take more and more time because they have to go through all the wrapped objects.

How reproducible:

always

Steps to Reproduce:

Simply create new `CommandContextImpl` instances.
while (true) {
  CommandContextFactory.getInstance().newCommandContext();
}


Actual results:
OutOfMemory error (on my machine somewhere between 16k and 32k instances)

Expected results:
everything from unused CommandContexts is correctly cleaned up and new instances are created/disposed