Hello
Our Nomad servers all report the following error every 5 seconds
[ERROR] nomad.rpc: unrecognized RPC byte: byte=22
All servers and clients are running Nomad v1.5.6 (except one client, running Nomad v1.5.0).
What is this mysteriour byte 22 of the RPC contract and who keeps sending it?
Hi @vxjohanforssell,
It’s impossible to tell from that log line alone and depending on your security setup, it could be coming from anything. Do you have any additional logs lines around this?
Thanks,
jrasell and the Nomad team
Ah, it’s not some known nomad grpc change then? The logs are fairly quiet except for this thing
jul 19 14:09:04 2add36-workload-server nomad[1135]: 2023-07-19T14:09:04.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:09 2add36-workload-server nomad[1135]: 2023-07-19T14:09:09.699Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:14 2add36-workload-server nomad[1135]: 2023-07-19T14:09:14.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:19 2add36-workload-server nomad[1135]: 2023-07-19T14:09:19.699Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:24 2add36-workload-server nomad[1135]: 2023-07-19T14:09:24.699Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:29 2add36-workload-server nomad[1135]: 2023-07-19T14:09:29.699Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:34 2add36-workload-server nomad[1135]: 2023-07-19T14:09:34.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:39 2add36-workload-server nomad[1135]: 2023-07-19T14:09:39.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:44 2add36-workload-server nomad[1135]: 2023-07-19T14:09:44.699Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:49 2add36-workload-server nomad[1135]: 2023-07-19T14:09:49.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:54 2add36-workload-server nomad[1135]: 2023-07-19T14:09:54.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:09:59 2add36-workload-server nomad[1135]: 2023-07-19T14:09:59.699Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:10:04 2add36-workload-server nomad[1135]: 2023-07-19T14:10:04.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:10:09 2add36-workload-server nomad[1135]: 2023-07-19T14:10:09.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:10:14 2add36-workload-server nomad[1135]: 2023-07-19T14:10:14.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
jul 19 14:10:19 2add36-workload-server nomad[1135]: 2023-07-19T14:10:19.698Z [ERROR] nomad.rpc: unrecognized RPC byte: byte=22
The error message “unrecognized RPC byte: byte=22” indicates that an RPC communication has received a byte with a value of 22 that the receiving system doesn’t recognize or support. The exact meaning and cause of this error can vary depending on the specific RPC implementation and the systems involved.