format_kairosdb: Log an error when `uc_get_rate()` fails.

diff --git a/src/utils/format_kairosdb/format_kairosdb.c b/src/utils/format_kairosdb/format_kairosdb.c
index ad9d944071a2375df3584989633f3fe8841cd138..d8f92a19502d1eee358e66a1e0281b0f20bd3a73 100644 (file)
--- a/src/utils/format_kairosdb/format_kairosdb.c
+++ b/src/utils/format_kairosdb/format_kairosdb.c
@@ -85,6 +85,7 @@ static int json_add_rate(yajl_gen g, metric_t const *m) {
   gauge_t rate = NAN;
   int err = uc_get_rate(m, &rate);
   if (err) {
+    ERROR("format_kairosdb: uc_get_rate failed: %s", STRERROR(err));
     return err;
   }