redis集群+JedisCluster+lua脚本实现分布式锁，转
https://blog.csdn.net/qq_20597727/article/details/85235602
在这片文章中，使用Jedis clien进行lua脚本的相关操作，同时也使用一部分jedis提供的具有原子性set操作来完成值和过期时间的同时设置。使用lua脚本根本原因也是为了保证我们两个redis操作之间的原子性，使分布式锁更加可靠。
JedisCluster相关代码配置
在博主的实现例子中使用redis集群实现分布式锁，所以在开始分布式锁实现之前需要进行JedisCluster的相关配置。博主是在spring boot的下进行开发，JedisCluster需要做的配置如下。
首先是依赖包引入，如下代码所示。
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
</dependency>
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加入必要的配置信息
#redis集群连接配置
spring.redis.cluster.nodes=192.168.0.15:6379,192.168.0.15:6380,192.168.0.15:6381,192.168.0.15:6382,192.168.0.15:6383,192.168.0.15:6384
#redis
spring.redis.cluster.max-redirects=6
spring.redis.jedis.pool.max-active=80
spring.redis.jedis.pool.max-idle=30
spring.redis.jedis.pool.max-wait=2000s
spring.redis.jedis.pool.min-idle=10
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其次就是JedisCluster的配置方式，单机环境下Jedis也有相应的配置，在此不多说。JedisCluster配置如下。
/**
* @author zhoujy
* @date 2018年12月19日
**/
@Configuration
public class RedisDistributeLockConfig {
@Value("${spring.redis.cluster.nodes}")
String redisNodes;
@Bean
//定义分布式锁对象，稍后讲解实现
public RedisDistributeLock redisDistributeLock(JedisCluster jedisCluster){
return new RedisDistributeLock(jedisCluster);
}
@Bean
//定义JedisCluster操作bean
public JedisCluster jedisCluster(){
return new JedisCluster(pharseHostAnport());
}
private Set<HostAndPort> pharseHostAnport(){
if (StringUtils.isEmpty(redisNodes)){
throw new RuntimeException("redis nodes can't be null or empty");
}
String[] hps = redisNodes.split(",");
Set<HostAndPort> hostAndPorts = new HashSet<>();
for (String hp : hps) {
String[] hap = hp.split(":");
hostAndPorts.add(new HostAndPort(hap[0], Integer.parseInt(hap[1])));
}
return hostAndPorts;
}
}
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分布式锁实现
在完成JedisCluster的所需配置之后，可以看看分布式锁的如何实现的
所有代码如下所示。
/**
* JedisCluster + lua脚本实现分布式锁
* @author zhoujy
* @date 2018年12月19日
**/
public class RedisDistributeLock {
private Logger logger = LoggerFactory.getLogger(RedisDistributeLock.class);
private JedisCluster jedisCluster;
/**
* lua脚本：判断锁住值是否为当前线程持有，是的话解锁，不是的话解锁失败
*/
private static final String DISTRIBUTE_LOCK_SCRIPT_UNLOCK_VAL = "if" +
" redis.call('get', KEYS[1]) == ARGV[1]" +
" then" +
" return redis.call('del', KEYS[1])" +
" else" +
" return 0" +
" end";
private volatile String unlockSha1 = "";
private static final Long UNLOCK_SUCCESS_CODE = 1L;
private static final String LOCK_SUCCESS_CODE = "ok";
public RedisDistributeLock(JedisCluster jedisCluster) {
this.jedisCluster = jedisCluster;
}
/**
* 根据loopTryTime循环重试
* @param lockKey 锁key
* @param lockVal 锁值，用于解锁校验
* @param expiryTime 锁过期时间
* @param loopTryTime 获取失败时，循环重试获取锁的时长
* @return 是否获得锁
*/
public boolean tryLock(String lockKey, String lockVal, long expiryTime, long loopTryTime){
Long endTime = System.currentTimeMillis() + loopTryTime;
while (System.currentTimeMillis() < endTime){
if (tryLock(lockKey, lockVal, expiryTime)){
return true;
}
}
return false;
}
/**
* 根据loopTryTime循环重试
* @param lockKey 锁key
* @param lockVal 锁值，用于解锁校验
* @param expiryTime 锁过期时间
* @param retryTimes 重试次数
* @param setpTime 每次重试间隔 mills
* @return 是否获得锁
*/
public boolean tryLock(String lockKey, String lockVal, long expiryTime, int retryTimes, long setpTime){
while (retryTimes > 0){
if (tryLock(lockKey, lockVal, expiryTime)){
return true;
}
retryTimes--;
try {
Thread.sleep(setpTime);
} catch (InterruptedException e) {
logger.error("get distribute lock error" +e.getLocalizedMessage());
}
}
return false;
}
/**
* 一次尝试，快速失败。不支持重入
* @param lockKey 锁key
* @param lockVal 锁值，用于解锁校验
* @param expiryTime 锁过期时间 MILLS
* @return 是否获得锁
*/
public boolean tryLock(String lockKey, String lockVal, long expiryTime){
//相比一般的分布式锁，这里把setNx和setExpiry操作合并到一起，jedis保证原子性，避免连个命令之间出现宕机等问题
//这里也可以我们使用lua脚本实现
String result = jedisCluster.set(lockKey, lockVal, "NX", "PX", expiryTime);
return LOCK_SUCCESS_CODE.equalsIgnoreCase(result);
}
/**
* 释放分布式锁，释放失败最可能是业务执行时间长于lockKey过期时间，应当结合业务场景调整过期时间
* @param lockKey 锁key
* @param lockVal 锁值
* @return 是否释放成功
*/
public boolean tryUnLock(String lockKey, String lockVal){
List<String> keys = new ArrayList<>();
keys.add(lockKey);
List<String> argv = new ArrayList<>();
argv.add(lockVal);
try {
Object result = jedisCluster.evalsha(unlockSha1, keys, argv);
return UNLOCK_SUCCESS_CODE.equals(result);
}catch (JedisNoScriptException e){
//没有脚本缓存时，重新发送缓存
logger.info("try to store script......");
storeScript(lockKey);
Object result = jedisCluster.evalsha(unlockSha1, keys, argv);
return UNLOCK_SUCCESS_CODE.equals(result);
}catch (Exception e){
e.printStackTrace();
return false;
}
}
/**
* 由于使用redis集群，因此每个节点都需要各自缓存一份脚本数据
* @param slotKey 用来定位对应的slot的slotKey
*/
public void storeScript(String slotKey){
if (StringUtils.isEmpty(unlockSha1) || !jedisCluster.scriptExists(unlockSha1, slotKey)){
//redis支持脚本缓存，返回哈希码，后续可以继续用来调用脚本
unlockSha1 = jedisCluster.scriptLoad(DISTRIBUTE_LOCK_SCRIPT_UNLOCK_VAL, slotKey);
}
}
}
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针对上面的代码，逐步分析。
加锁操作
相比一般的redis分布式锁，这里操作jedis的操作方式进行加锁，好处就是Jedis保证set与设置有效期两个操作之间的原子性，避免在set值之后，程序宕机，导致没有设置过期时间，锁就一直被锁住。
这一步操作我们单独使用lua脚本实现也可以，但是幸好jedis已经帮我们进行实现。
/**
* 一次尝试，快速失败。不支持重入
* @param lockKey 锁key
* @param lockVal 锁值，用于解锁校验
* @param expiryTime 锁过期时间 MILLS
* @return 是否获得锁
*/
public boolean tryLock(String lockKey, String lockVal, long expiryTime){
//相比一般的分布式锁，这里把setNx和setExpiry操作合并到一起，jedis保证原子性，避免连个命令之间出现宕机等问题
//这里也可以我们使用lua脚本实现
//NX表示setNX操作，PX表示过期时间是mills
String result = jedisCluster.set(lockKey, lockVal, "NX", "PX", expiryTime);
return LOCK_SUCCESS_CODE.equalsIgnoreCase(result);
}
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同时加锁操作也有几个简单的重载实现，分别是重试获取和循环获取锁的重载，根据业务场景适当调整使用。
解锁操作
这里的分布式锁的解锁操作使用lua脚本帮助实现。
我们都知道，分布式锁在解锁时一定需要验证是不是锁的持有者，这种情况下，我们需要进行的操作就有获取key的对应value，然后验证value的值，这个过程，存在一种情况，导致误删别的持有者的锁。分析如下的操作顺序图
上面的操作顺序可能出错的情况就是当lock1尝试释放时，先获取值，判断是否是锁的持有者，如果是，就再发指令删除锁。这个过程可能存在问题就是，lock1在获取值之后，刚好到了有效期了，那么锁可能会在此时被锁竞争者2获得，并且设置锁lock2，然而这时锁竞争者1删除锁的指令刚好重新发送到redis-server，就会误删lock2，导致后续会被其他锁竞争者3获取，发送不可知业务错误。
使用lua脚本的好处就是保证redis指令之间执行的原子性，把get和del执行放在脚本中，保证不会误删别的锁竞争者的锁，假如刚好出现get之后锁值过期，最多就是del操作结果为0，不会出现误删结果。
/**
* 释放分布式锁，释放失败最可能是业务执行时间长于lockKey过期时间，应当结合业务场景调整过期时间
* @param lockKey 锁key
* @param lockVal 锁值
* @return 是否释放成功
*/
public boolean tryUnLock(String lockKey, String lockVal){
List<String> keys = new ArrayList<>();
keys.add(lockKey);
List<String> argv = new ArrayList<>();
argv.add(lockVal);
try {
Object result = jedisCluster.evalsha(unlockSha1, keys, argv);
return UNLOCK_SUCCESS_CODE.equals(result);
}catch (JedisNoScriptException e){
//没有脚本缓存时，重新发送脚本并缓存
logger.info("try to store script......");
storeScript(lockKey);
//重试获取
Object result = jedisCluster.evalsha(unlockSha1, keys, argv);
return UNLOCK_SUCCESS_CODE.equals(result);
}catch (Exception e){
e.printStackTrace();
return false;
}
}
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解锁脚本
/**
* lua脚本：判断锁住值是否为当前线程持有，是的话解锁，不是的话解锁失败
*/
private static final String DISTRIBUTE_LOCK_SCRIPT_UNLOCK_VAL = "if" +
" redis.call('get', KEYS[1]) == ARGV[1]" +
" then" +
" return redis.call('del', KEYS[1])" +
" else" +
" return 0" +
" end";
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lua脚本缓存
在redis集群中，为了避免重复发送脚本数据浪费网络资源，可以使用script load命令进行脚本数据缓存，并且返回一个哈希码作为脚本的调用句柄，每次调用脚本只需要发送哈希码来调用即可。
127.0.0.1:6381> script load "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end"
"e9f69f2beb755be68b5e456ee2ce9aadfbc4ebf4"
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上面是在redis-cli中缓存脚本的方式，在程序中，存储lua脚本的方式是如下所示。使用jedis可以很方便就完成脚本缓存，先判断脚本缓存是否存在，不存在就进行脚本数据缓存并且保存哈希码，以备接下来调用脚本。
注意事项：需要注意的是，在redis集群环境下，每个节点都需要进行一份脚本缓存，否则就会出现
NOSCRIPT No matching script. Please use EVAL.
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错误，因此我在程序中加了处理。
/**
* 由于使用redis集群，因此每个节点都需要各自缓存一份脚本数据
* @param slotKey 用来定位对应的slot的slotKey
*/
public void storeScript(String slotKey){
if (StringUtils.isEmpty(unlockSha1) || !jedisCluster.scriptExists(unlockSha1, slotKey)){
//redis支持脚本缓存，返回哈希码，后续可以继续用来调用脚本
unlockSha1 = jedisCluster.scriptLoad(DISTRIBUTE_LOCK_SCRIPT_UNLOCK_VAL, slotKey);
}
}
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slotKey就是我们set值时的key，redis根据crc16函数 计算key应该对应哪一个slot，如果slot所在的redis节点没有缓存脚本数据就会报处NOSCRIPT No matching script. Please use EVAL.异常，因此当捕捉到这个异常时，我们在代码中重新发送脚本数据进行缓存即可。
/**
* 释放分布式锁，释放失败最可能是业务执行时间长于lockKey过期时间，应当结合业务场景调整过期时间
* @param lockKey 锁key
* @param lockVal 锁值
* @return 是否释放成功
*/
public boolean tryUnLock(String lockKey, String lockVal){
List<String> keys = new ArrayList<>();
keys.add(lockKey);
List<String> argv = new ArrayList<>();
argv.add(lockVal);
try {
Object result = jedisCluster.evalsha(unlockSha1, keys, argv);
return UNLOCK_SUCCESS_CODE.equals(result);
}catch (JedisNoScriptException e){
//没有脚本缓存时，重新发送脚本并缓存
//根据lockkey计算slot，在对应redis节点重新缓存一份脚本数据
logger.info("try to store script......");
storeScript(lockKey);
//重试获取
Object result = jedisCluster.evalsha(unlockSha1, keys, argv);
return UNLOCK_SUCCESS_CODE.equals(result);
}catch (Exception e){
e.printStackTrace();
return false;
}
}
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以上就是redis集群+lua脚本实现分布式锁的方式。
测试用例
@RunWith(SpringRunner.class)
@SpringBootTest(classes = {ActivityServiceApplication.class})
@Slf4j
public class ActivityServiceApplicationTests {
@Resource
private RedisDistributeLock redisDistributeLock;
@Test
public void testRedislock() throws InterruptedException {
for(int i=0;i < 50;i++){
int finalI = i;
new Thread(() ->{
if (redisDistributeLock.tryLock("TEST_LOCK_KEY", "TEST_LOCK_VAL_"+ finalI, 1000* 100, 1000*20)){
try {
log.warn("get lock successfully with lock value:-----" + "TEST_LOCK_VAL_"+ finalI);
Thread.sleep(2000);
if (!redisDistributeLock.tryUnLock("TEST_LOCK_KEY", "TEST_LOCK_VAL_"+ finalI)){
throw new RuntimeException("release lock fail");
}
log.warn("release lock successfully with lock value:-----" + "TEST_LOCK_VAL_"+ finalI);
} catch (InterruptedException e) {
e.printStackTrace();
}
}else {
log.warn("get lock fail with lock value:-----" + "TEST_LOCK_VAL_"+ finalI);
}
}).start();
}
Thread.sleep(1000*1000);
}
}
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设置50个线程尝试获取分布式锁，每个线程尝试时间为20秒；获取到锁的线程，sleep2秒，然后释放锁。
最终会出现，10个线程能够依次获得锁，40个线程获取锁超时失败。
2018-12-24 15:35:16.462 WARN 42580 --- [ Thread-61] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_47
2018-12-24 15:35:18.710 WARN 42580 --- [ Thread-61] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_47
2018-12-24 15:35:18.711 WARN 42580 --- [ Thread-14] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_0
2018-12-24 15:35:20.788 WARN 42580 --- [ Thread-14] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_0
2018-12-24 15:35:20.789 WARN 42580 --- [ Thread-51] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_37
2018-12-24 15:35:22.831 WARN 42580 --- [ Thread-47] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_33
2018-12-24 15:35:22.831 WARN 42580 --- [ Thread-51] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_37
2018-12-24 15:35:25.177 WARN 42580 --- [ Thread-47] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_33
2018-12-24 15:35:25.177 WARN 42580 --- [ Thread-55] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_41
2018-12-24 15:35:27.227 WARN 42580 --- [ Thread-55] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_41
2018-12-24 15:35:27.228 WARN 42580 --- [ Thread-36] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_22
2018-12-24 15:35:29.586 WARN 42580 --- [ Thread-36] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_22
2018-12-24 15:35:29.587 WARN 42580 --- [ Thread-35] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_21
2018-12-24 15:35:31.609 WARN 42580 --- [ Thread-35] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_21
2018-12-24 15:35:31.610 WARN 42580 --- [ Thread-28] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_14
2018-12-24 15:35:34.071 WARN 42580 --- [ Thread-28] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_14
2018-12-24 15:35:34.071 WARN 42580 --- [ Thread-31] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_17
2018-12-24 15:35:36.089 WARN 42580 --- [ Thread-31] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_17
2018-12-24 15:35:36.089 WARN 42580 --- [ Thread-54] g.learn.ActivityServiceApplicationTests : get lock successfully with lock value:-----TEST_LOCK_VAL_40
2018-12-24 15:35:36.449 WARN 42580 --- [ Thread-60] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_46
2018-12-24 15:35:36.450 WARN 42580 --- [ Thread-52] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_38
2018-12-24 15:35:36.450 WARN 42580 --- [ Thread-56] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_42
2018-12-24 15:35:36.450 WARN 42580 --- [ Thread-59] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_45
2018-12-24 15:35:36.453 WARN 42580 --- [ Thread-38] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_24
2018-12-24 15:35:36.453 WARN 42580 --- [ Thread-37] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_23
2018-12-24 15:35:36.453 WARN 42580 --- [ Thread-45] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_31
2018-12-24 15:35:36.453 WARN 42580 --- [ Thread-43] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_29
2018-12-24 15:35:36.453 WARN 42580 --- [ Thread-49] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_35
2018-12-24 15:35:36.453 WARN 42580 --- [ Thread-39] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_25
2018-12-24 15:35:36.453 WARN 42580 --- [ Thread-34] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_20
2018-12-24 15:35:36.454 WARN 42580 --- [ Thread-16] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_2
2018-12-24 15:35:36.454 WARN 42580 --- [ Thread-26] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_12
2018-12-24 15:35:36.454 WARN 42580 --- [ Thread-21] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_7
2018-12-24 15:35:36.454 WARN 42580 --- [ Thread-22] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_8
2018-12-24 15:35:36.454 WARN 42580 --- [ Thread-15] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_1
2018-12-24 15:35:36.454 WARN 42580 --- [ Thread-27] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_13
2018-12-24 15:35:36.454 WARN 42580 --- [ Thread-17] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_3
2018-12-24 15:35:36.455 WARN 42580 --- [ Thread-25] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_11
2018-12-24 15:35:36.455 WARN 42580 --- [ Thread-62] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_48
2018-12-24 15:35:36.455 WARN 42580 --- [ Thread-57] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_43
2018-12-24 15:35:36.455 WARN 42580 --- [ Thread-40] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_26
2018-12-24 15:35:36.455 WARN 42580 --- [ Thread-33] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_19
2018-12-24 15:35:36.455 WARN 42580 --- [ Thread-30] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_16
2018-12-24 15:35:36.455 WARN 42580 --- [ Thread-41] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_27
2018-12-24 15:35:36.455 WARN 42580 --- [ Thread-42] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_28
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-48] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_34
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-63] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_49
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-29] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_15
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-32] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_18
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-50] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_36
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-46] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_32
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-19] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_5
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-20] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_6
2018-12-24 15:35:36.456 WARN 42580 --- [ Thread-53] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_39
2018-12-24 15:35:36.457 WARN 42580 --- [ Thread-23] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_9
2018-12-24 15:35:36.457 WARN 42580 --- [ Thread-58] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_44
2018-12-24 15:35:36.457 WARN 42580 --- [ Thread-18] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_4
2018-12-24 15:35:36.457 WARN 42580 --- [ Thread-24] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_10
2018-12-24 15:35:36.457 WARN 42580 --- [ Thread-44] g.learn.ActivityServiceApplicationTests : get lock fail with lock value:-----TEST_LOCK_VAL_30
2018-12-24 15:35:38.091 WARN 42580 --- [ Thread-54] g.learn.ActivityServiceApplicationTests : release lock successfully with lock value:-----TEST_LOCK_VAL_40
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