這兩天服務部署啟動，突然不work，檢視啟動日志發現是redis初始化，出現了異常，導緻應用啟動失敗
開始以為是redis的host配置出錯，因為最近配置沒有人改動，很奇怪
通過列印錯誤，發現redis的host和端口正常
于是通過列印的錯誤棧追蹤源碼，發現UnixResolverDnsServerAddressStreamProvider類去加載了/etc/resolv.conf，于是排查到這個dns解析檔案中的配置，有一個ipv6的位址，這個位址是不存在的，把這個位址注釋掉，繼續啟動應用，發現服務正常了
注釋掉了第二個dns解析的位址.png
關于為什麼沒有去第一個ipv4的dns服務位址去解析，而去了第二個，猜想可能是第一個dns服務異常導緻的
錯誤棧
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redissonClient' defined in class path resource [mx/smartmatrix/internal/config/CacheConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.redisson.api.RedissonClient]: Factory method 'redissonClient' threw exception; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1181)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1075)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
... 54 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.redisson.api.RedissonClient]: Factory method 'redissonClient' threw exception; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
... 67 common frames omitted
Caused by: java.lang.ExceptionInInitializerError: null
at io.netty.resolver.dns.UnixResolverDnsServerAddressStreamProvider.parseSilently(UnixResolverDnsServerAddressStreamProvider.java:76)
at io.netty.resolver.dns.DnsServerAddressStreamProviders$1.provider(DnsServerAddressStreamProviders.java:57)
at io.netty.resolver.dns.DnsServerAddressStreamProviders$1.(DnsServerAddressStreamProviders.java:36)
at io.netty.resolver.dns.DnsServerAddressStreamProviders.(DnsServerAddressStreamProviders.java:34)
at org.redisson.connection.MasterSlaveConnectionManager.(MasterSlaveConnectionManager.java:205)
at org.redisson.connection.MasterSlaveConnectionManager.(MasterSlaveConnectionManager.java:157)
at org.redisson.connection.SingleConnectionManager.(SingleConnectionManager.java:34)
at org.redisson.config.ConfigSupport.createConnectionManager(ConfigSupport.java:228)
at org.redisson.Redisson.(Redisson.java:121)
at org.redisson.Redisson.create(Redisson.java:164)
at mx.smartmatrix.common.config.BaseCacheConfig.redissonClient(BaseCacheConfig.java:74)
at mx.smartmatrix.internal.config.CacheConfig$$EnhancerBySpringCGLIB$$d195d73.CGLIB$redissonClient$4()
at mx.smartmatrix.internal.config.CacheConfig$$EnhancerBySpringCGLIB$$d195d73$$FastClassBySpringCGLIB$$a443df20.invoke()
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358)
at mx.smartmatrix.internal.config.CacheConfig$$EnhancerBySpringCGLIB$$d195d73.redissonClient()
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
... 68 common frames omitted
Caused by: java.lang.IllegalArgumentException: cannot use an unresolved DNS server address: [fe80::46ef:bfff:fe2e:aac5%ens33]:53
at io.netty.resolver.dns.DnsServerAddresses.sanitize(DnsServerAddresses.java:179)
at io.netty.resolver.dns.DnsServerAddresses.sequential(DnsServerAddresses.java:67)
at io.netty.resolver.dns.DefaultDnsServerAddressStreamProvider.(DefaultDnsServerAddressStreamProvider.java:107)
... 89 common frames omitted