HTTP Parser error is launched constantly

Hi all,

Im getting this error in Ignition V7.9.11:

Illegal character 0x16 in state=START for buffer HeapByteBuffer@4ec19b22[p=1,l=517,c=8192,r=516]={\x16<<<\x03\x01\x02\x00\x01\x00\x01\xFc\x03\x03N(\xB5y?T\xB0…\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00>>>isNull=“true”/></…pa8XgCRAdNNHekL}

This error has been repeating every Saturday at the same time during 15 min. Between this time, in production lines the plc status show timeout errors. I have been searching in the internet but I havent found enough information.

Someone knows what or why this errors is launched?


I would check with your IT department because it sounds like some kind of network/security scan is happening at that time.

Hi Kevin,

Thanks for your quick response. I was checking into server event viewer and I found a lot of error related with schannel source, that makes me think that it is indeed a security issue.