# Client\_session\_keepalive\_manag:122 warning : ClientSessionKeepAliveManager#ping\_server Invalid Channel after performing transaction on ReadRequest

**URL:** <https://discourse.nodered.org/t/client-session-keepalive-manag-122-warning-clientsessionkeepalivemanager-ping-server-invalid-channel-after-performing-transaction-on-readrequest/95606>\
**Category:** General\
**Tags:** node-red-dashboard, opcua\
**Created:** [24 February 2025 10:08 UTC](https://discourse.nodered.org/t/client-session-keepalive-manag-122-warning-clientsessionkeepalivemanager-ping-server-invalid-channel-after-performing-transaction-on-readrequest/95606 "2025-02-24T10:08:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gautamt572](https://avatars.discourse-cdn.com/v4/letter/g/898d66/32.png) [@gautamt572](https://discourse.nodered.org/u/gautamt572)\
**Post date:** [24 February 2025 10:08 UTC](https://discourse.nodered.org/t/client-session-keepalive-manag-122-warning-clientsessionkeepalivemanager-ping-server-invalid-channel-after-performing-transaction-on-readrequest/95606/1 "2025-02-24T10:08:00Z")

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Hi

I'm facing below issue in one of the nodered flow where we are fetching data from OPCUA server. Sometimes the data flow stops suddenly and gives below error. It doesnt start until we manual restart the flow,Could you please help on the below error how to resolve it.

22:51:53.879Z :client\_session\_keepalive\_manag:122 warning : ClientSessionKeepAliveManager#ping\_server Transaction has timed out ( timeout = 60000 ms , request = ReadRequest)  
22:53:13.881Z :client\_session\_keepalive\_manag:122 warning : ClientSessionKeepAliveManager#ping\_server Transaction has timed out ( timeout = 60000 ms , request = ReadRequest)  
.  
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23:07:08.897Z :client\_session\_keepalive\_manag:122 warning : ClientSessionKeepAliveManager#ping\_server Invalid Channel after performing transaction on ReadRequest  
23:07:28.898Z :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:** [25 May 2025 10:08 UTC](https://discourse.nodered.org/t/client-session-keepalive-manag-122-warning-clientsessionkeepalivemanager-ping-server-invalid-channel-after-performing-transaction-on-readrequest/95606/2 "2025-05-25T10:08:38Z")

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