# Warning : ClientSessionKeepAliveManager#ping\_server Invalid Channel after performing transaction on ReadRequest

**URL:** <https://discourse.nodered.org/t/warning-clientsessionkeepalivemanager-ping-server-invalid-channel-after-performing-transaction-on-readrequest/96561>\
**Category:** General\
**Tags:** opcua\
**Created:** [14 April 2025 10:40 UTC](https://discourse.nodered.org/t/warning-clientsessionkeepalivemanager-ping-server-invalid-channel-after-performing-transaction-on-readrequest/96561 "2025-04-14T10:40:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mrStark](https://avatars.discourse-cdn.com/v4/letter/m/82dd89/32.png) [@mrStark](https://discourse.nodered.org/u/mrStark)\
**Post date:** [14 April 2025 10:40 UTC](https://discourse.nodered.org/t/warning-clientsessionkeepalivemanager-ping-server-invalid-channel-after-performing-transaction-on-readrequest/96561/1 "2025-04-14T10:40:18Z")

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Whenever the connection drops, due to maybe network issue or opcua server restarts; after restart the connection doesn't happens automatically until we manually redeploy the flow.  
Getting below error in logs:

````auto
21:48:55.019Z :client_session_keepalive_manag:122 warning : ClientSessionKeepAliveManager#ping_server Transaction has timed out ( timeout = 60000 ms , request = ReadRequest)
21:50:15.020Z :client_session_keepalive_manag:122 warning : ClientSessionKeepAliveManager#ping_server Transaction has timed out ( timeout = 60000 ms , request = ReadRequest)
21:51:15.021Z :client_session_keepalive_manag:122 warning : ClientSessionKeepAliveManager#ping_server Invalid Channel after performing transaction on ReadRequest
21:51:35.022Z :client_session_keepalive_manag:122 warning : ClientSessionKeepAliveManager#ping_server Invalid Channel after performing transaction on ReadRequest ```
````

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [13 July 2025 10:41 UTC](https://discourse.nodered.org/t/warning-clientsessionkeepalivemanager-ping-server-invalid-channel-after-performing-transaction-on-readrequest/96561/2 "2025-07-13T10:41:14Z")

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