"Normalized odd number of arguments by adding nil " when unmarshalling data in geth client

Question

I use json.marshal api encoding a struct and then send the marshalled data to geth. It's oK to unmarshal the data locally, but geth returns a error when unmarshalling it. I don't why, please give me some advice, thanks.

When i specify this error, it returns a message "err="json: cannot unmarshal non-string into Go struct field Filterinput.ContractAddress of type common.Address". it's log15 error in geth, but i can't figure out what the log15 is used for

Answer 1

For anyone who is developing on Go version of Ethereum, and followed the error: “Normalized odd number of arguments by adding nil” to here.

It is actually an error message from log15. Which means you must feed even number items to the log function. For example:

log.Info("some_str", item1, item2)

or:

log.Info("some_str", item1, item2, item3, item4)

Check out the source code explanation of log15: here