dubbo集成zipkin问题二【Caused by: java.lang.IllegalStateException: zookeeper not connected】

我不是女神ヾ 2023-03-13 05:52 10阅读 0赞

### dubbo集成zipkin官网博客地址 ###

[在 Dubbo 中使用 Zipkin][Dubbo _ Zipkin]

### 遇到的问题 ###

运行官网的demo报错`zookeeper not connected`，链接不上zookeeper，开始以为是zookeeper的版本和项目依赖的版本不一致，改了几个版本之后还是不行，然后在本机启动了一个zookeeper，使用127.0.0.1:2181来链接，发现可以链接成功（demo和zookeeper运行在一起的时候链接挺快的，没啥问题），检查了zookeeper的地址确实没错。

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'helloService': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: zookeeper not connected
    	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:177)
    	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103)
    	at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1640)
    	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:323)
    	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    	at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351)
    	... 15 more
    Caused by: java.lang.IllegalStateException: zookeeper not connected
    	at org.apache.dubbo.remoting.zookeeper.curator.CuratorZookeeperClient.<init>(CuratorZookeeperClient.java:83)
    	at org.apache.dubbo.remoting.zookeeper.curator.CuratorZookeeperTransporter.createZookeeperClient(CuratorZookeeperTransporter.java:26)
    	at org.apache.dubbo.remoting.zookeeper.support.AbstractZookeeperTransporter.connect(AbstractZookeeperTransporter.java:70)
    	at org.apache.dubbo.remoting.zookeeper.ZookeeperTransporter$Adaptive.connect(ZookeeperTransporter$Adaptive.java)
    	at org.apache.dubbo.configcenter.support.zookeeper.ZookeeperDynamicConfiguration.<init>(ZookeeperDynamicConfiguration.java:70)
    	at org.apache.dubbo.configcenter.support.zookeeper.ZookeeperDynamicConfigurationFactory.createDynamicConfiguration(ZookeeperDynamicConfigurationFactory.java:37)
    	at org.apache.dubbo.common.config.configcenter.AbstractDynamicConfigurationFactory.lambda$getDynamicConfiguration$0(AbstractDynamicConfigurationFactory.java:39)
    	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
    	at org.apache.dubbo.common.config.configcenter.AbstractDynamicConfigurationFactory.getDynamicConfiguration(AbstractDynamicConfigurationFactory.java:39)
    	at org.apache.dubbo.common.config.configcenter.DynamicConfiguration.getDynamicConfiguration(DynamicConfiguration.java:223)
    	at org.apache.dubbo.config.bootstrap.DubboBootstrap.prepareEnvironment(DubboBootstrap.java:857)
    	at org.apache.dubbo.config.bootstrap.DubboBootstrap.startConfigCenter(DubboBootstrap.java:603)
    	at org.apache.dubbo.config.bootstrap.DubboBootstrap.useRegistryAsConfigCenterIfNecessary(DubboBootstrap.java:671)
    	at org.apache.dubbo.config.bootstrap.DubboBootstrap.initialize(DubboBootstrap.java:509)
    	at org.apache.dubbo.config.bootstrap.DubboBootstrap.init(DubboBootstrap.java:494)
    	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:190)
    	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:158)
    	at org.apache.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:68)
    	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:170)
    	... 20 more
    Caused by: java.lang.IllegalStateException: zookeeper not connected
    	at org.apache.dubbo.remoting.zookeeper.curator.CuratorZookeeperClient.<init>(CuratorZookeeperClient.java:80)
    	... 38 more

### 参考解决方案 ###

[记一次dubbo连接zookeeper注册中心发生异常的排查经历][dubbo_zookeeper]  
这个文章里面的错误和上面的错误一样，参考他的解决方案可以解决，这里记录一下报错的原因是什么。

### 问题分析 ###

#### 第一步 ####

根据报错信息和异常信息，报错信息在`CuratorZookeeperClient.java:80`的80行，报错的原因从代码上看就是zookeeper链接不上。之前确认了zookeeper地址、版本啥的确实没错，看方法看到这里有一个timeout属性，debug来看一下。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTAzMTYxODg_size_16_color_FFFFFF_t_70]  
debug之后发现这里的超时时间是3000，也就是3秒钟，估计3秒钟太短了，所以导致链接不上。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTAzMTYxODg_size_16_color_FFFFFF_t_70 1]  
然后通过代码得到timeout这个属性是从url里面获取的，url里面的timeout属性就是`3000` 。

zookeeper://192.168.1.78:2181/ConfigCenterConfig?check=true&config-file=dubbo.properties&group=dubbo&highest-priority=false&timeout=3000

知道超时时间是从url里面来的，然后就是看url是怎么来的。

通过调用的堆栈信息找到`DubboBootstrap`这里类的`useRegistryAsConfigCenterIfNecessary`的这个方法，这里会判断配置管理器有没有`ConfigCenterConfig`这个配置，如果没有，就会把`registryConfig`的一些属性赋值给一个新建的`ConfigCenterConfig`，在554行的位置会判断有没有timeout这个属性，如果有就获取这里的timeout，如果没有就使用默认的，`ConfigCenterConfig`这个类默认的`private Long timeout = 3000L;`就是`3000L`.

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTAzMTYxODg_size_16_color_FFFFFF_t_70 2]  
知道这个timeout怎么来的，然后对其进行相对应的修改就可以了。

### 修改方法 ###

#### 方法一 ####

在`dubbo:registry`标签添加一个`timeout`属性就可以。

<dubbo:registry address="zookeeper://${zookeeper.address:192.168.1.78}:2181"  timeout="25000"/>

#### 方法二 ####

添加一个dubbo:config-center的标签，设置 `timeout`属性。

<dubbo:config-center timeout="23000"></dubbo:config-center>

demo都是基于xml来实现的。

[Dubbo _ Zipkin]: http://dubbo.apache.org/zh-cn/blog/use-zipkin-in-dubbo.html
[dubbo_zookeeper]: https://www.cnblogs.com/yaofengdoit/p/12215878.html
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