MQ channel sessions are not closing

Hi Team,

We have cluster Production environment and recently We have done MQ setup like, we will connect to other MQ server with below mq connection parameter and we created MQ listener and notification for this connection. Same setup is done in both production nodes.
The issue is now, MQ channel connections are not closing in MQ server, where the MQ server which are connecting.

Now they have reporting the issue, because the MQ channel sessions are not closing at their end, which have been opened in their system.

Could you please let me know, if there are parameter settings to resolve this issue.

MQ Adapter Version:
Description WebSphere MQ Adapter
Adapter Version 6.5
Updates MQS_6.5_Fix38

We have created Websphere MQ Transactional connection to get the messages from the queue.

Queue Manager Name XXXX
Host Name .XXX
TCP/IP Port 1428
Server Connection Channel XXX
User Id
Queue Name(s) XXXX
Dynamic Queue Prefix
Encoding 00273-Native
Send Exit Name
Send Exit Init Parms
Receive Exit Name
Receive Exit Init Parms
Security Exit Name
Security Exit Init Parms
Cache Overridden Connections true
Action before Disconnecting an in-transaction Connection COMMIT

Enable Connection Pooling true
Minimum Pool Size 1
Maximum Pool Size 10
Pool Increment Size 1
Block Timeout (msec) 1000
Expire Timeout (msec) 1000
Startup Retry Count 0
Startup Backoff Timeout (sec) 10


please check if it is possible for you to set minimum pool size to 0.

In this case, as soon as there is no more traffic on the connections they will be closed after expiration without starting new ones.
New ones will be createed upon new traffic then.
Otherwise each instance in the cluster pertains at least one connection. When the last one gets closed, the adapter immediately creates a new one. When the last connection in the pool goes into a stale state (still existing, but no longer working), you will have to restart the instance to get fresh connections available.