diff --git a/powerjob-server/powerjob-server-core/src/main/java/tech/powerjob/server/core/service/CacheService.java b/powerjob-server/powerjob-server-core/src/main/java/tech/powerjob/server/core/service/CacheService.java
index 491ea328..c4ae22a4 100644
--- a/powerjob-server/powerjob-server-core/src/main/java/tech/powerjob/server/core/service/CacheService.java
+++ b/powerjob-server/powerjob-server-core/src/main/java/tech/powerjob/server/core/service/CacheService.java
@@ -44,18 +44,22 @@ public class CacheService {
         jobId2JobNameCache = CacheBuilder.newBuilder()
                 .expireAfterWrite(Duration.ofMinutes(1))
                 .maximumSize(512)
+                .softValues()
                 .build();
 
         workflowId2WorkflowNameCache = CacheBuilder.newBuilder()
                 .expireAfterWrite(Duration.ofMinutes(1))
                 .maximumSize(512)
+                .softValues()
                 .build();
 
         instanceId2AppId = CacheBuilder.newBuilder()
                 .maximumSize(1024)
+                .softValues()
                 .build();
         jobId2AppId = CacheBuilder.newBuilder()
                 .maximumSize(1024)
+                .softValues()
                 .build();
     }
 
diff --git a/powerjob-server/powerjob-server-extension/src/main/java/tech/powerjob/server/extension/defaultimpl/alarm/impl/DingTalkAlarmService.java b/powerjob-server/powerjob-server-extension/src/main/java/tech/powerjob/server/extension/defaultimpl/alarm/impl/DingTalkAlarmService.java
index b42d9c05..57eb4d35 100644
--- a/powerjob-server/powerjob-server-extension/src/main/java/tech/powerjob/server/extension/defaultimpl/alarm/impl/DingTalkAlarmService.java
+++ b/powerjob-server/powerjob-server-extension/src/main/java/tech/powerjob/server/extension/defaultimpl/alarm/impl/DingTalkAlarmService.java
@@ -1,25 +1,24 @@
 package tech.powerjob.server.extension.defaultimpl.alarm.impl;
 
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Service;
 import tech.powerjob.common.OmsConstant;
 import tech.powerjob.common.exception.PowerJobException;
 import tech.powerjob.common.utils.NetUtils;
 import tech.powerjob.server.common.PowerJobServerConfigKey;
 import tech.powerjob.server.common.SJ;
-import tech.powerjob.server.persistence.remote.model.UserInfoDO;
-import tech.powerjob.server.extension.defaultimpl.alarm.module.Alarm;
 import tech.powerjob.server.extension.Alarmable;
-import com.google.common.cache.Cache;
-import com.google.common.cache.CacheBuilder;
-import com.google.common.collect.Lists;
-import com.google.common.collect.Sets;
-import lombok.extern.slf4j.Slf4j;
-import org.apache.commons.lang3.StringUtils;
-import org.springframework.core.env.Environment;
-import org.springframework.stereotype.Service;
+import tech.powerjob.server.extension.defaultimpl.alarm.module.Alarm;
+import tech.powerjob.server.persistence.remote.model.UserInfoDO;
 
 import javax.annotation.PostConstruct;
-import javax.annotation.Resource;
 import java.util.List;
 import java.util.Set;
 
@@ -108,7 +107,7 @@ public class DingTalkAlarmService implements Alarmable {
         }
         this.agentId = Long.valueOf(agentId);
         dingTalkUtils = new DingTalkUtils(appKey, appSecret);
-        mobile2UserIdCache = CacheBuilder.newBuilder().maximumSize(CACHE_SIZE).build();
+        mobile2UserIdCache = CacheBuilder.newBuilder().maximumSize(CACHE_SIZE).softValues().build();
         log.info("[DingTalkAlarmService] init DingTalkAlarmService successfully!");
     }