fix sentinel memory leak
fix sentinel memory leak

himoca/redis,ttuna/msot-redis,ttuna/msot-redis,ksarch-saas/redis,splitice/redis,louisliangjun/redis,ramonsnir/redis,MSOpenTech/redis,splitice/redis,xuzhezhaozhao/redis_reading,MSOpenTech/redis,ksarch-saas/redis,maodeyi/redis_lua,xuzhezhaozhao/redis_reading,slfs007/mk-redis,louisliangjun/redis,HunanTV/redis,spearhead-ea/redis,maodeyi/redis_lua,splitice/redis,xuzhezhaozhao/redis_reading,louisliangjun/redis,MSOpenTech/redis,MSOpenTech/redis,himoca/redis,spearhead-ea/redis,maodeyi/redis_lua,HunanTV/redis,himoca/redis,ramonsnir/redis,splitice/redis,slfs007/mk-redis,xuzhezhaozhao/redis_reading,ramonsnir/redis,HunanTV/redis,HunanTV/redis,ttuna/msot-redis,louisliangjun/redis,ksarch-saas/redis,spearhead-ea/redis,ttuna/msot-redis,ttuna/msot-redis,ksarch-saas/redis,slfs007/mk-redis,MSOpenTech/redis