The high availability of applications in the WebLogic environment is realized by clustering. Managed servers in the cluster work together. The information about transactions is distributed cluster-wide. If a cluster member fails, another server takes over the tasks of the failed server and executes them. In this way, the applications are kept running without interruption.
The AdminServer is a single point of failure: if the server fails, the Domain is no longer administrable:
– Configuration changes cannot be performed
– The administration console is not available
The managed servers are still running and can continue to work, even if the AdminServer is not available: this requires the activation of MSI (Managed Server Independence) Mode.
How can the AdminSevrer be protected from failure? In this blogpost I will describe all the steps that are necessary to keep your server running safely.