How to print debug statements in Maelstrom with Go

1

From the Maelstrom docs

Maelstrom nodes receive messages on STDIN, send messages on STDOUT, and log debugging output on STDERR. Maelstrom nodes must not print anything that is not a message to STDOUT. Maelstrom will log STDERR output to disk for you.

I am using fmt.Fprint(os.Stderr, "Received message: ", msg, "\n") to print to STDERR but can’t find it. Does anyone know how I can log messages to better understand the protocol?

Thank you

2

You can find the STDERR logs for each node under:

$MAELSTROM_DIR/store/$WORKLOAD/$TIMESTAMP/node-logs

You can also find debugging info when you run: maelstrom serve

1 Like