Single-Node Listener States

You can change the state of a single-node listener on all nodes in an Integration Server cluster from any node in the cluster. When a single-node listener is enabled, disabled, or suspended on all nodes in the cluster, the action that a particular node takes depends on:

the selected state change on all nodes

the listener state on the particular node, that is if the listener thread is running or not

whether the particular node is the active (primary) node

For example, if a single-node listener has already been suspended on node A, and then on node B you enable the listener on all nodes in the cluster, node A can:

enable the listener, if node A becomes the active node in the cluster.

show the listener as enabled without creating a new thread, if another node has already become the active one.

The following table shows what change occurs in the state of a single-node listener on a particular node in the cluster when you enable, disable, or suspend the listener on all nodes.

Listener State on a Particular Node	Enable Listener on All Nodes	Disable Listener on All Nodes	Suspend Listener on All Nodes
Enabled	No action	Disable the listener if this is the active node Show the listener as disabled if this is not the active node. No action	Suspend the listener if this is the active node Show the listener as suspended if this is not the active node. No action
Disabled	Enable the listener if the node acquires the lock on the shared cache and becomes the active node Show the listener as enabled if another node has already become the active node. No action	No action	No action
Suspended	Enable the listener if the node acquires the lock on the shared cache and becomes the active node Show the listener as enabled if another node became the active node. No action	Show the listener as disabled. No action	No action

If a single-node listener is active on a particular node and you try to disable it, another Integration Server node's listener will become active if that listener is in an enabled state. If the listener is in a disabled state on all other Integration Server nodes, those nodes will ignore the disable operation.