try { CacheFactory cacheFactory = CacheManager.getInstance() .getCacheFactory(); cache = cacheFactory.createCache(Collections.emptyMap()); LOG.info("Cache Created"); cache.put(key, value); } catch (CacheException ex) { LOG.error("cache exception encountered:{}", ex); } 

com.google.apphosting.api.ApiProxy$CallNotFoundException: Can't make API call memcache.Set in a thread that is neither the original request thread nor a thread created by ThreadManager at com.google.apphosting.api.ApiProxy$CallNotFoundException.foreignThread(ApiProxy.java:800) ~[appengine-api-1.0-sdk-1.9.54.jar:na] at com.google.apphosting.api.ApiProxy$1.get(ApiProxy.java:175) ~[appengine-api-1.0-sdk-1.9.54.jar:na] at com.google.apphosting.api.ApiProxy$1.get(ApiProxy.java:172) ~[appengine-api-1.0-sdk-1.9.54.jar:na] at com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:89) ~[appengine-api-1.0-sdk-1.9.54.jar:na] at com.google.appengine.api.memcache.MemcacheServiceImpl.quietGet(MemcacheServiceImpl.java:26) ~[appengine-api-1.0-sdk-1.9.54.jar:na] at com.google.appengine.api.memcache.MemcacheServiceImpl.put(MemcacheServiceImpl.java:69) ~[appengine-api-1.0-sdk-1.9.54.jar:na] at com.google.appengine.api.memcache.stdimpl.GCache.put(GCache.java:157) ~[appengine-api-1.0-sdk-1.9.54.jar:na] 

 <dependency> <groupId>com.google.appengine</groupId> <artifactId>appengine-api-1.0-sdk</artifactId> <version>1.9.54</version> </dependency>