update

examcloud-core-questions-service/src/main/java/cn/com/qmth/examcloud/core/questions/service/PaperStructService.java

@@ -47,7 +47,7 @@ public class PaperStructService {
 
     private static final Logger log = LoggerFactory.getLogger(PaperStructService.class);
 
-    private Cache<String, PaperStruct> localPaperStructCache = CacheBuilder.newBuilder().expireAfterWrite(3, TimeUnit.MINUTES).build();
+    private static Cache<String, PaperStruct> localPaperStructCache = CacheBuilder.newBuilder().expireAfterWrite(3, TimeUnit.MINUTES).build();
 
     private static int cacheTimeOut = 2 * 60 * 60;
 

examcloud-core-questions-service/src/main/java/cn/com/qmth/examcloud/core/questions/service/impl/RandomPaperServiceImpl.java

@@ -65,7 +65,7 @@ public class RandomPaperServiceImpl implements RandomPaperService {
 
     private static final Logger log = LoggerFactory.getLogger(RandomPaperServiceImpl.class);
 
-    private Cache<String, RandomPaperCache> localRandomPaperCache = CacheBuilder.newBuilder().expireAfterWrite(3, TimeUnit.MINUTES).build();
+    private static Cache<String, RandomPaperCache> localRandomPaperCache = CacheBuilder.newBuilder().expireAfterWrite(3, TimeUnit.MINUTES).build();
 
     private static int cacheTimeOut = 2 * 60 * 60;