After running few hours OpENer will meet infinity timout loop

[OscarLee-ov]

I'm running OpENer in my linux docker. And after running like 18 hours.
My OpENer will face this issue

And I can see PLC just disconnect and reconnected back again.

So I tried to kill the OpENer process and re-run it again to see if it will avoid this issue.
But it didn't work.

I have added some log in OpENer for me to trace why it happened this issue.
But I've no idea why it cause this issue.

2025-09-12T05:59:20.519738432Z networkhandler: opened new TCP connection on fd 8
2025-09-12T05:59:20.520289600Z UDP file:/tmp/OpENer_custom/OpENer/source/src/cip/cipioconnection.c line:1030 func:CloseCommunicationChannelsAndRemoveFromActiveConnectionsList
2025-09-12T05:59:20.520297504Z Closing UDP socket 9
2025-09-12T05:59:20.520298720Z UDP file:/tmp/OpENer_custom/OpENer/source/src/cip/cipioconnection.c line:1036 func:CloseCommunicationChannelsAndRemoveFromActiveConnectionsList
2025-09-12T05:59:20.520299360Z Closing UDP socket 9
2025-09-12T05:59:38.044551008Z Close file:/tmp/OpENer_custom/OpENer/source/src/cip/cipconnectionmanager.c line:1820 func:CheckForTimedOutConnectionsAndCloseTCPConnections
2025-09-12T05:59:38.044557472Z Close file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:718 func:CloseEncapsulationSessionBySockAddr
2025-09-12T05:59:38.044558752Z Tcp file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:658 func:CloseSession
2025-09-12T05:59:38.044559744Z Closing TCP socket 8
2025-09-12T05:59:48.204386368Z networkhandler: opened new TCP connection on fd 8
2025-09-12T05:59:48.204765088Z UDP file:/tmp/OpENer_custom/OpENer/source/src/cip/cipioconnection.c line:1030 func:CloseCommunicationChannelsAndRemoveFromActiveConnectionsList
2025-09-12T05:59:48.204767776Z Closing UDP socket 9
2025-09-12T05:59:48.204768704Z UDP file:/tmp/OpENer_custom/OpENer/source/src/cip/cipioconnection.c line:1036 func:CloseCommunicationChannelsAndRemoveFromActiveConnectionsList
2025-09-12T05:59:48.204776512Z Closing UDP socket 9
2025-09-12T05:59:49.466318112Z Close file:/tmp/OpENer_custom/OpENer/source/src/cip/cipconnectionmanager.c line:1820 func:CheckForTimedOutConnectionsAndCloseTCPConnections
2025-09-12T05:59:49.466330080Z Close file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:718 func:CloseEncapsulationSessionBySockAddr
2025-09-12T05:59:49.466331328Z Tcp file:/tmp/OpENer_custom/OpENer/source/src/enet_en`/encap.c line:658 func:CloseSession
2025-09-12T05:59:49.466332032Z Closing TCP socket 8
2025-09-12T06:00:00.003920938Z ------------------------------------------------
2025-09-12T06:00:00.003930592Z Restarting opener_thread to ensure it is running
2025-09-12T06:00:00.004119456Z killing_opener_process pid=748133
2025-09-12T06:00:00.004980736Z opener_process_died_or_was_killed pid=748133
2025-09-12T06:00:02.675948480Z started_opener_process pid=847361
2025-09-12T06:00:02.676084213Z ------------------------------------------------
2025-09-12T06:00:02.677159872Z Loading of some NV data failed. Maybe the first start?
2025-09-12T06:00:10.019200416Z networkhandler: opened new TCP connection on fd 8
2025-09-12T06:00:14.997168864Z Close file:/tmp/OpENer_custom/OpENer/source/src/cip/cipconnectionmanager.c line:1820 func:CheckForTimedOutConnectionsAndCloseTCPConnections
2025-09-12T06:00:14.997179936Z Close file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:718 func:CloseEncapsulationSessionBySockAddr
2025-09-12T06:00:14.997181024Z Tcp file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:658 func:CloseSession
2025-09-12T06:00:14.997181856Z Closing TCP socket 8
2025-09-12T06:00:25.539077056Z networkhandler: opened new TCP connection on fd 8
2025-09-12T06:00:25.539539680Z UDP file:/tmp/OpENer_custom/OpENer/source/src/cip/cipioconnection.c line:1030 func:CloseCommunicationChannelsAndRemoveFromActiveConnectionsList
2025-09-12T06:00:25.539543072Z Closing UDP socket 9
2025-09-12T06:00:25.539544128Z UDP file:/tmp/OpENer_custom/OpENer/source/src/cip/cipioconnection.c line:1036 func:CloseCommunicationChannelsAndRemoveFromActiveConnectionsList
2025-09-12T06:00:25.539544992Z Closing UDP socket 9
2025-09-12T06:00:29.287166752Z Close file:/tmp/OpENer_custom/OpENer/source/src/cip/cipconnectionmanager.c line:1820 func:CheckForTimedOutConnectionsAndCloseTCPConnections
2025-09-12T06:00:29.287178752Z Close file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:718 func:CloseEncapsulationSessionBySockAddr
2025-09-12T06:00:29.287179968Z Tcp file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:658 func:CloseSession
2025-09-12T06:00:29.287180640Z Closing TCP socket 8
2025-09-12T06:00:39.831347424Z networkhandler: opened new TCP connection on fd 8
2025-09-12T06:00:39.832085568Z UDP file:/tmp/OpENer_custom/OpENer/source/src/cip/cipioconnection.c line:1030 func:CloseCommunicationChannelsAndRemoveFromActiveConnectionsList
2025-09-12T06:00:39.832089536Z Closing UDP socket 9
2025-09-12T06:00:39.832090944Z UDP file:/tmp/OpENer_custom/OpENer/source/src/cip/cipioconnection.c line:1036 func:CloseCommunicationChannelsAndRemoveFromActiveConnectionsList
2025-09-12T06:00:39.832091648Z Closing UDP socket 9
2025-09-12T06:00:50.687361568Z Close file:/tmp/OpENer_custom/OpENer/source/src/cip/cipconnectionmanager.c line:1820 func:CheckForTimedOutConnectionsAndCloseTCPConnections
2025-09-12T06:00:50.687369792Z Close file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:718 func:CloseEncapsulationSessionBySockAddr
2025-09-12T06:00:50.687370688Z Tcp file:/tmp/OpENer_custom/OpENer/source/src/enet_encap/encap.c line:658 func:CloseSession
2025-09-12T06:00:50.687371808Z Closing TCP socket 8

[alexhaifeng]

The RPI value might be too small. Try increasing the RPI to 10ms, and increase the timeout multiplier to 16 times or more.