SOAP requests not handled in op/base nodes

[kamilchodola]

From time to time in all op/base nodes we receive some SOAP requests from op-node like this:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<soap_env:Envelope
xmlns:soap_env="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:soap_enc="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:cwmp="urn:dslforum-org:cwmp-1-2">
<soap_env:Body>
<cwmp:Inform>
<DeviceId>
<Manufacturer>DISCOVERYSERVICE</Manufacturer>
<OUI>DISCOVERYSERVICE</OUI>
<ProductClass>DISCOVERYSERVICE</ProductClass>
<SerialNumber>SdvKJzhzwN</SerialNumber>
</DeviceId>
<Event soap_enc:arrayType="cwmp:EventStruct[1]">
<EventStruct>
<EventCode>M ScheduleInform</EventCode>
<CommandKey />
</EventStruct>
</Event>
</cwmp:Inform>
</soap_env:Body>
</soap_env:Envelope>

We either need to handle them ig this is needed for op-node to function fully or handle them more gracefully on our end as for now we are throwing an exception to logs:

Error during parsing/validation. System.Text.Json.JsonReaderException: '<' is an invalid start of a value. LineNumber: 0 | BytePositionInLine: 0.

[emlautarom1]

The SOAP message seems to be related to the TR-069 protocol (https://en.wikipedia.org/wiki/TR-069) but I have no clue as to why op-node could be sending these kind of messages. I've created a ticket on their repository to see if we can clarify this issue.