diff --git a/src/main/java/cn/lihongjie/coal/ip/IpQueryService.java b/src/main/java/cn/lihongjie/coal/ip/IpQueryService.java
index 83660bb6..1beadb85 100644
--- a/src/main/java/cn/lihongjie/coal/ip/IpQueryService.java
+++ b/src/main/java/cn/lihongjie/coal/ip/IpQueryService.java
@@ -85,6 +85,7 @@ class IpQueryService {
                 String search = searcher.search(ipaddr);
                 return search.replace("|0|", "").replace("|", "");
             } catch (Exception e) {
+                log.warn("failed to search ip2region {}", ipaddr, e);
                 return "";
             }
         }