项目启动报错：Redis health check failed

最近是重新开发整个项目，在上线测试的时候发现这个问题。

项目环境：SpringBoot2.x+Consul+Redission+Maven

报错的信息如下：

o.s.b.a.redis.RedisHealthIndicator - Redis health check failed
org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool

项目中引用了健康检查

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

通过spring-boot-actuator-autoconfigure:2.1.13.RELEASE的jar包找到了源码

源代码如下：

@Configuration
@ConditionalOnClass(RedisConnectionFactory.class)
@ConditionalOnBean(RedisConnectionFactory.class)
@ConditionalOnEnabledHealthIndicator("redis")
@AutoConfigureBefore(HealthIndicatorAutoConfiguration.class)
@AutoConfigureAfter({ RedisAutoConfiguration.class, RedisReactiveHealthIndicatorAutoConfiguration.class })
public class RedisHealthIndicatorAutoConfiguration
		extends CompositeHealthIndicatorConfiguration<RedisHealthIndicator, RedisConnectionFactory> {

	private final Map<String, RedisConnectionFactory> redisConnectionFactories;

	public RedisHealthIndicatorAutoConfiguration(Map<String, RedisConnectionFactory> redisConnectionFactories) {
		this.redisConnectionFactories = redisConnectionFactories;
	}

	@Bean
	@ConditionalOnMissingBean(name = "redisHealthIndicator")
	public HealthIndicator redisHealthIndicator() {
		return createHealthIndicator(this.redisConnectionFactories);
	}

}

解决方法1：

通过@ConditionalOnEnabledHealthIndicator可以知道解决办法，在配置文件中禁用redis检查

management:
  health:
    redis:       ---禁用redis检查
#    defaults:   ---也可以禁用，不推荐
      enabled: false

解决方法2：

查看源码发现RedisHealthIndicator继承AbstractHealthIndicator，AbstractHealthIndicator实现了HealthIndicator接口。我们可以通过自定义配置来解决。

@Configuration
public class RedisHealthIndicator implements HealthIndicator{

    @Override
    public Health health() {
        return Health.up().build();
    }
}

注意：我们必须要将原有的RedisHealthIndicator类覆盖，所以class名为RedisHealthIndicator。如果类想另起名则需指定bean名为redisHealthIndicator，否则还是会出现错误信息。

最后说下自己遇到的原因吧！属实有点尴尬。

自己项目上线遇到的问题则是怪自己粗心。只在redisson的配置文件中配置了redis连接，忘记在application.yml配置redis的连接信息。