Technical data

Restarting Failed Server Instances
Configuring and Managing WebLogic Server 10-11
Restarting an Administration Server When Managed Servers are Running
If the Administration Server shuts down while Managed Servers continue to run, you
do not need to restart the Managed Servers that are already running in order to recover
management of the domain. The procedure for recovering management of an active
domain depends upon whether you can restart the Administration Server on the same
machine it was running on when the domain was started.
Restarting an Administration Server on the Same Machine
If you restart the WebLogic Administration Server while Managed Servers continue to
run, by default the Administration Server can discover the presence of the running
Managed Servers.
Note: Make sure that the startup command or startup script does not include
-Dweblogic.management.discover=false, which disables an
Administration Server from discovering its running Managed Servers. For
more information about
-Dweblogic.management.discover,see“Server
Communication” in weblogic.Server Command-Line Reference.
The root directory for the domain contains a file
running-managed-servers.xml
which is a list of the Managed Servers that the Administration Server knows about.
When the Administration Server starts, it uses this list to check for the presence of
running Managed Servers.
Restarting the Administration Server does not cause Managed Servers to update the
configuration of static attributes. Static attributes are those that a server refers to only
during its startup process. WebLogic Servers must be restarted to take account of
changes to static configuration attributes. Discovery of the Managed Servers only
enables the Administration Server to monitor the Managed Servers or make runtime
changes in attributes that can be configured while a server is running (dynamic
attributes).
Restarting an Administration Server on Another Machine
If a machine crash prevents you from restarting the Administration Server on the same
machine, you can recover management of the running Managed Servers as follows:
1. Install the WebLogic Server software on the new administration machine (if this
has not already been done).