问题起因
做毕设的时候，使用到Lettuce连接redis，一段时间后不操作，再去操作redis，会报连接超时错误，在其重连后又可使用。
原因是：Lettuce 自适应拓扑刷新（Adaptive updates）与定时拓扑刷新（Periodic updates） 是默认关闭的导致问题的出现
解决的方案
1、重写连接工厂实例，更改其LettuceClientConfiguration 为开启拓扑更新
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
@Configurationpublic class RedisConfig { @Autowired private RedisProperties redisProperties; //这是固定的模板 //自己定义了一个RedisTemplate @Bean @SuppressWarnings("all") public RedisTemplate<String, Object> redisTemplate(@Qualifier("lettuceConnectionFactoryUvPv") RedisConnectionFactory factory) { RedisTemplate<String, Object> template = new RedisTemplate<>(); template.setConnectionFactory(factory); //Json序列化配置 Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class); ObjectMapper om = new ObjectMapper(); om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); om.activateDefaultTyping(om.getPolymorphicTypeValidator()); om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); //解决序列化问题 om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); jackson2JsonRedisSerializer.setObjectMapper(om); //String的序列化 StringRedisSerializer stringRedisSerializer = new StringRedisSerializer(); //key采用String的序列化方式 template.setKeySerializer(stringRedisSerializer); //hash的key也采用String的序列化方式 template.setHashKeySerializer(stringRedisSerializer); //value序列化方式采用jackson template.setValueSerializer(jackson2JsonRedisSerializer); //hash的value序列化方式采用jackson template.setHashValueSerializer(jackson2JsonRedisSerializer); template.afterPropertiesSet(); return template; } /** * 为RedisTemplate配置Redis连接工厂实现 * LettuceConnectionFactory实现了RedisConnectionFactory接口 * UVPV用Redis * * @return 返回LettuceConnectionFactory */ @Bean(destroyMethod = "destroy") //这里要注意的是，在构建LettuceConnectionFactory 时，如果不使用内置的destroyMethod，可能会导致Redis连接早于其它Bean被销毁 public LettuceConnectionFactory lettuceConnectionFactoryUvPv() throws Exception { List<String> clusterNodes = redisProperties.getCluster().getNodes(); Set<RedisNode> nodes = new HashSet<>(); clusterNodes.forEach(address -> nodes.add(new RedisNode(address.split(":")[0].trim(), Integer.parseInt(address.split(":")[1])))); RedisClusterConfiguration clusterConfiguration = new RedisClusterConfiguration(); clusterConfiguration.setClusterNodes(nodes); clusterConfiguration.setPassword(RedisPassword.of(redisProperties.getPassword())); clusterConfiguration.setMaxRedirects(redisProperties.getCluster().getMaxRedirects()); RedisStandaloneConfiguration redisStandaloneConfiguration=new RedisStandaloneConfiguration(); redisStandaloneConfiguration.setHostName(redisProperties.getHost()); redisStandaloneConfiguration.setPassword(redisProperties.getPassword()); redisStandaloneConfiguration.setDatabase(redisProperties.getDatabase()); redisStandaloneConfiguration.setPort(redisProperties.getPort()); GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig(); poolConfig.setMaxIdle(redisProperties.getLettuce().getPool().getMaxIdle()); poolConfig.setMinIdle(redisProperties.getLettuce().getPool().getMinIdle()); poolConfig.setMaxTotal(redisProperties.getLettuce().getPool().getMaxActive()); return new LettuceConnectionFactory(redisStandaloneConfiguration, getLettuceClientConfiguration(poolConfig)); } /** * 配置LettuceClientConfiguration 包括线程池配置和安全项配置 * * @param genericObjectPoolConfig common-pool2线程池 * @return lettuceClientConfiguration */ private LettuceClientConfiguration getLettuceClientConfiguration(GenericObjectPoolConfig genericObjectPoolConfig) { /* ClusterTopologyRefreshOptions配置用于开启自适应刷新和定时刷新。如自适应刷新不开启，Redis集群变更时将会导致连接异常！ */ ClusterTopologyRefreshOptions topologyRefreshOptions = ClusterTopologyRefreshOptions.builder() //开启自适应刷新 //.enableAdaptiveRefreshTrigger(ClusterTopologyRefreshOptions.RefreshTrigger.MOVED_REDIRECT, ClusterTopologyRefreshOptions.RefreshTrigger.PERSISTENT_RECONNECTS) //开启所有自适应刷新，MOVED，ASK，PERSISTENT都会触发 .enableAllAdaptiveRefreshTriggers() // 自适应刷新超时时间(默认30秒) .adaptiveRefreshTriggersTimeout(Duration.ofSeconds(25)) //默认关闭开启后时间为30秒 // 开周期刷新 .enablePeriodicRefresh(Duration.ofSeconds(20)) // 默认关闭开启后时间为60秒 ClusterTopologyRefreshOptions.DEFAULT_REFRESH_PERIOD 60 .enablePeriodicRefresh(Duration.ofSeconds(2)) = .enablePeriodicRefresh().refreshPeriod(Duration.ofSeconds(2)) .build(); return LettucePoolingClientConfiguration.builder() .poolConfig(genericObjectPoolConfig) .clientOptions(ClusterClientOptions.builder().topologyRefreshOptions(topologyRefreshOptions).build()) //将appID传入连接，方便Redis监控中查看 //.clientName(appName + "_lettuce") .build(); }} |
2、SpringBoot2.3.x后，可使用配置文件中开启lettuce的拓扑刷新
|
1
2
3
4
5
6
7
8
9
10
11
|
lettuce: pool: max-active: 20 max-wait: -1ms max-idle: 10 min-idle: 2 cluster: refresh: adaptive: true #20秒自动刷新一次 period: 20 |
3、更改连接redis的连接方式，使用jedis连接
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> <exclusions> <exclusion> <groupId>io.lettuce</groupId> <artifactId>lettuce-core</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> </dependency> |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
|
spring: redis: jedis: pool: max-active: ${redis.config.maxTotal:1024} max-idle: ${redis.config.maxIdle:50} min-idle: ${redis.config.minIdle:1} max-wait: ${redis.config.maxWaitMillis:5000} #lettuce: #pool: #max-active: ${redis.config.maxTotal:1024} #max-idle: ${redis.config.maxIdle:50} #min-idle: ${redis.config.minIdle:1} #max-wait: ${redis.config.maxWaitMillis:5000} |
到此这篇关于SpringBoot整合redis使用Lettuce客户端超时问题的文章就介绍到这了,更多相关SpringBoot整合redis内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家！
原文链接：https://www.cnblogs.com/shouyaya/p/14607270.html
