fix: resolve deadlock in cache eviction and improve GetBatch implementation

pkg/rpccache/online.go

@@ -3,15 +3,16 @@ package rpccache
 import (
 	"context"
 	"fmt"
-	"github.com/openimsdk/open-im-server/v3/pkg/rpcli"
-	"github.com/openimsdk/protocol/constant"
-	"github.com/openimsdk/protocol/user"
 	"math/rand"
 	"strconv"
 	"sync"
 	"sync/atomic"
 	"time"
 
+	"github.com/openimsdk/open-im-server/v3/pkg/rpcli"
+	"github.com/openimsdk/protocol/constant"
+	"github.com/openimsdk/protocol/user"
+
 	"github.com/openimsdk/open-im-server/v3/pkg/common/storage/cache/cachekey"
 	"github.com/openimsdk/open-im-server/v3/pkg/localcache"
 	"github.com/openimsdk/open-im-server/v3/pkg/localcache/lru"
@@ -46,7 +47,7 @@ func NewOnlineCache(client *rpcli.UserClient, group *GroupLocalCache, rdb redis.
 	case false:
 		log.ZDebug(ctx, "fullUserCache is false")
 		x.lruCache = lru.NewSlotLRU(1024, localcache.LRUStringHash, func() lru.LRU[string, []int32] {
-			return lru.NewLayLRU[string, []int32](2048, cachekey.OnlineExpire/2, time.Second*3, localcache.EmptyTarget{}, func(key string, value []int32) {})
+			return lru.NewLazyLRU[string, []int32](2048, cachekey.OnlineExpire/2, time.Second*3, localcache.EmptyTarget{}, func(key string, value []int32) {})
 		})
 		x.CurrentPhase.Store(DoSubscribeOver)
 		x.Cond.Broadcast()