Merge pull request #610 from metrico/fix/undef_time_unix_nano

fix for when timeUnixNano is undefined

Author: akvlad

lib/handlers/otlp_log_push.js

@@ -30,7 +30,11 @@ async function handle (req, res) {
           }
           const labels = stringify(logAttrs)
           const fingerprint = fingerPrint(labels)
-          const ts = BigInt(logRecord.timeUnixNano)
+          const ts = logRecord.timeUnixNano
+            ? BigInt(logRecord.timeUnixNano)
+            : logRecord.observedTimeUnixNano
+              ? BigInt(logRecord.observedTimeUnixNano)
+              : BigInt(Date.now()) * BigInt(1000000)
           promises.push(bulk.add([[
             fingerprint,
             ts,