Optional: Configure the high
availability manager protocol to establish transparent bridge failover
support. When a core group bridge server restarts, state
information, such as WLM data, and ODR or WebSphere Application Server
proxy server routing data, is lost until the state information is
recovered by a bridge in the same core group. The length of time the
data is lost varies depending on the number of core groups and the
amount of state data, but the length of time can be a minute or longer.
During this time, ODRs and WebSphere Application Server proxy servers
might report 503 errors, and JNDI look-ups for objects in remote core
groups might fail.
If you are running on Version 7.0.0.1 or
later, you can avoid such outages, if you enable the transparent bridge
failover protocol by setting the IBM_CS_HAM_PROTOCOL_VERSION custom
property to 6.0.2.31 in each core group. When this custom property
is set to 6.0.2.31, the remaining bridges recover
the high availability state of the failed bridge without the data
being unavailable in the local core group.
Complete the following
actions to set the IBM_CS_HAM_PROTOCOL_VERSION core group custom property
to 6.0.2.31 for all of your core groups.
- Shut down all core group bridges in all of your core
groups.
- Repeat the following actions for each core group in
each of your cells:
- In the administrative console, click core_group_name >
Custom properties.
- Specify IBM_CS_HAM_PROTOCOL_VERSION in
the Name field, and 6.0.2.31 in
the Value field.
- Save your changes.
- Synchronize your changes across the topology.
- Restart all of the bridges in the topology.
All of the core groups within this topology are using
the 6.0.2.31 high availability manager protocol.