2.4.9. ha service configuration
Prev  2.4. Configuring JOnAS Services  Next

2.4.9. ha service configuration

The ha (High Availability) service is required in order to replicate stateful session beans (SFSBs).

The ha service uses JGroups as a group communication protocol (GCP).

Here is the part of jonas.properties related to ha service:

###################### JOnAS HA service configuration
#
# Set the name of the implementation class of the HA service.
jonas.service.ha.class    org.ow2.jonas.ha.internal.HaServiceImpl

# Set the JGroups configuration file name
jonas.service.ha.jgroups.conf jgroups-ha.xml 1

# Set the JGroups group name
jonas.service.ha.jgroups.groupname jonas-rep 2

# Set the SFSB backup info timeout. The info stored in the backup node is removed when the timer expires.
jonas.service.ha.gc.period 600 3

# Set the datasource for the tx table
jonas.service.ha.datasource jdbc_1 4

# Reconnection timeout for JGroups Channel, if it's closed on request.
jonas.service.ha.reconnection.timeout 5000 5

1

Set the name of the JGroups configuration file.

2

Set the name of the JGroups group.

3

Set the period of time (in seconds) the system waits before cleaning useless replication information.

4

Set the JNDI name of the datasource corresponding to the database where is located the transaction table used by the replication mechanism.

5

Set the delay to wait for a reconnection.
[Note] Note

Refer to the clustering guide for issues related to JGroups.

Prev  Up  Next
2.4.8. ejb3 service configuration  Home  2.4.10. jaxrpc service configuration