diff --git a/collector/src/main/java/com/usthe/collector/collect/common/cache/CommonCache.java b/collector/src/main/java/com/usthe/collector/collect/common/cache/CommonCache.java
index 819b9cb..014a62e 100644
--- a/collector/src/main/java/com/usthe/collector/collect/common/cache/CommonCache.java
+++ b/collector/src/main/java/com/usthe/collector/collect/common/cache/CommonCache.java
@@ -121,15 +121,17 @@ public class CommonCache {
                     timeoutMap.put(key, new Long[]{currentTime, DEFAULT_CACHE_TIMEOUT});
                 } else if (cacheTime[0] + cacheTime[1] < currentTime) {
                     // 过期了 discard 关闭这个cache的资源
+                    log.warn("[cache] clean the timeout cache, key {}", key);
                     timeoutMap.remove(key);
                     cacheMap.remove(key);
                     if (value instanceof CacheCloseable) {
+                        log.warn("[cache] close the timeout cache, key {}", key);
                         ((CacheCloseable)value).close();
                     }
                 }
             });
         } catch (Exception e) {
-            log.error("clean timeout cache error: {}.", e.getMessage(), e);
+            log.error("[cache] clean timeout cache error: {}.", e.getMessage(), e);
         }
     }
 
@@ -177,13 +179,14 @@ public class CommonCache {
             return Optional.empty();
         }
         if (cacheTime[0] + cacheTime[1] < System.currentTimeMillis()) {
-            log.warn("[cache] is timeout, key {}.", key);
+            log.warn("[cache] is timeout, remove it, key {}.", key);
             timeoutMap.remove(key);
             cacheMap.remove(key);
             return Optional.empty();
         }
         Object value = cacheMap.get(key);
         if (value == null) {
+            log.error("[cache] value is null, remove it, key {}.", key);
             cacheMap.remove(key);
             timeoutMap.remove(key);
         } else if (refreshCache) {
diff --git a/manager/src/main/java/com/usthe/manager/controller/MonitorsController.java b/manager/src/main/java/com/usthe/manager/controller/MonitorsController.java
index 53be6f6..474c3f8 100644
--- a/manager/src/main/java/com/usthe/manager/controller/MonitorsController.java
+++ b/manager/src/main/java/com/usthe/manager/controller/MonitorsController.java
@@ -79,9 +79,17 @@ public class MonitorsController {
                 orList.add(predicateName);
             }
             Predicate[] orPredicates = new Predicate[orList.size()];
-            Predicate orPredicate = criteriaBuilder.and(orList.toArray(orPredicates));
+            Predicate orPredicate = criteriaBuilder.or(orList.toArray(orPredicates));
 
-            return query.where(andPredicate,orPredicate).getRestriction();
+            if (andPredicate.getExpressions().isEmpty() && orPredicate.getExpressions().isEmpty()) {
+                return query.where().getRestriction();
+            } else if (andPredicate.getExpressions().isEmpty()) {
+                return query.where(orPredicate).getRestriction();
+            } else if (orPredicate.getExpressions().isEmpty()) {
+                return query.where(andPredicate).getRestriction();
+            } else {
+                return query.where(andPredicate,orPredicate).getRestriction();
+            }
         };
         // 分页是必须的
         Sort sortExp = Sort.by(new Sort.Order(Sort.Direction.fromString(order), sort));
diff --git a/web-app/src/app/layout/basic/widgets/search.component.ts b/web-app/src/app/layout/basic/widgets/search.component.ts
index 9120558..05f37cb 100644
--- a/web-app/src/app/layout/basic/widgets/search.component.ts
+++ b/web-app/src/app/layout/basic/widgets/search.component.ts
@@ -96,7 +96,11 @@ export class HeaderSearchComponent implements AfterViewInit, OnDestroy {
             searchMonitors$.unsubscribe();
             if (message.code === 0) {
               let page = message.data;
-              this.options = page.content;
+              if (page.content != undefined) {
+                this.options = page.content;
+              } else {
+                this.options = [];
+              }
               this.cdr.detectChanges();
             } else {
               console.warn(message.msg);
@@ -118,7 +122,7 @@ export class HeaderSearchComponent implements AfterViewInit, OnDestroy {
   qBlur(): void {
     this.focus = false;
     this.searchToggled = false;
-    this.options.length = 0;
+    this.options = [];
     this.toggleChangeChange.emit(false);
   }