Requestor pooling is available for both stateless and stateful authenticated nodes. In stateless authentication, the requestor is destroyed and a dummy requestor ID (blank string) is returned to the pool.
When testing or monitoring a service, you can examine the status of the requestor pool using the System Management application.
Start the System Management application. You might be prompted for authentication credentials.
Select a node.
Select Administration > Requestor pools.
To terminate idle requestors for a pool, click a radio button for that pool and click Clear Requestor Pool.
Please refer below link for more information about requestor pool.