out_loki: Change loglevel for non-existing label in ra

This message can be reduced from warning to debug level. Prevents from spamming the Fluent Bit log, in case logs sometimes do not have all defined labels filled

Signed-off-by: Richard Treu <[email protected]>

plugins/out_loki/loki.c

@@ -363,7 +363,7 @@ static flb_sds_t pack_labels(struct flb_loki *ctx,
             ra_val = flb_ra_translate(kv->ra_key, tag, tag_len, *(map), NULL);
             if (!ra_val || flb_sds_len(ra_val) == 0) {
                 /* if no value is retruned or if it's empty, just skip it */
-                flb_plg_warn(ctx->ins,
+                flb_plg_debug(ctx->ins,
                              "empty record accessor key translation for pattern: %s",
                              kv->ra_key->pattern);
             }