【Seata】分布式事务框架Seata踩坑集锦

红太狼 2023-02-17 11:25 2阅读 0赞

> 推荐一款非常好用的kafka管理平台,kafka的灵魂伴侣  
>   
> [滴滴开源Logi-KafkaManager 一站式Kafka监控与管控平台][Logi-KafkaManager _Kafka]

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## 技术交流 ##

有想进**滴滴LogI开源用户群**的加我个人微信: jjdlmn\_ 进群(备注：进群)  
群里面主要交流 **kakfa**、**es**、**agent**、**LogI-kafka-manager**、等等相关技术;  
群内有专人解答你的问题  
对~ 相关技术领域的解答人员都有; 你问的问题都会得到回应

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## 坑1 no available service ‘default’ found ##

`i.s.c.r.netty.NettyClientChannelManager : no available service 'null' found, please make sure registry config correct`  
或  
`no available service 'default' found, please make sure registry config correct`

这个问题的原因是没有找到 seata-server ;  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70]

**1.确认自己seata-server启动了**

**2.确认客户端启动的时候连接配置是正确的**

例如：`seata-server`选择的注册中心是redis; `配置 cluster=default`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70 1]  
注册成功之后看看redis的值  
![在这里插入图片描述][20200621160956995.png]  
确认客户端的配置是正确的  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70 2]  
如果上面都正确，但是还是有问题,请确认一下自己是不是手动配置了 `GlobalTransactionScanner`，确认一下配置的txServiceGroup参数是否跟跟配置一样;如下  
![在这里插入图片描述][20200616152955744.png]

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## 坑2 com.alibaba.nacos.api.exception.NacosException ##

Seata 使用注册中心的时候用的是Nacos,启动报错

Caused by: java.lang.ClassNotFoundException: com.alibaba.nacos.api.exception.NacosException
    	at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_221]
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_221]
    	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_221]
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_221]
    	... 39 common frames omitted

Seata-All 在引入相应的jar包的时候都是 `<scope>provide</scope>`  
![在这里插入图片描述][20200621163659476.png]  
说明我们要引入对应的依赖才行; 按需引入;  
同理 如果用的是Redis的注册中心也要引入redis的客户端

<dependency>
                <groupId>com.alibaba.nacos</groupId>
                <artifactId>nacos-client</artifactId>
                <version>1.3.0</version>
            </dependency>
    
            
            <dependency>
                <groupId>redis.clients</groupId>
                <artifactId>jedis</artifactId>
                <version>2.9.0</version>
            </dependency>

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## 坑3 NotSupportYetException: not support register type: null ##

在引入seata的过程中,启动的时候报如下的错误

nested exception is io.seata.common.exception.NotSupportYetException: 
     not support register type: null
     io.seata.common.exception.ShouldNeverHappenException: 
     Can't find any object of class org.springframework.context.ApplicationContext

他的原因就是**SpringApplicationContextProvider**没有被执行到  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70 3]

因为我的是用`seata-spring-boot-starter`方式启动的；然后又手贱配置了`GlobalTransactionScanner`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70 4]  
那么这个`GlobalTransactionScanner`开始加载的时候,`SpringApplicationContextProvider`并没有被执行；`GlobalTransactionScanner`需要依赖于`SpringApplicationContextProvider`, 所以报错了

**解决方法: `seata-spring-boot-starter`方式启动已经自动加载了`GlobalTransactionScanner` 见`SeataAutoConfiguration`**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70 5]  
如果一定要自己手动加载的话 ,请加上注解

@DependsOn({BEAN_NAME_SPRING_APPLICATION_CONTEXT_PROVIDER, BEAN_NAME_FAILURE_HANDLER})

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70 6]  
但是,没有必要手动配置

`配置 GlobalTransactionScanner，使用 seata-all 时需要手动配置，使用 seata-spring-boot-starter 时无需额外处理。`

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## 坑4 can not register RM,err:can not connect to services-server. ##

之前一直好好的,过几天启动就报这个错了,后来我看了一下注册中心，注册了好几个ip;  
都是之前注册过的,不知道为啥没有被清理;

io.seata.common.exception.FrameworkException: 
    can not register RM,err:can not connect to services-server.

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70 7]

**解决方案 ：把key删掉重新启动 seata-server**

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## 坑5 Could not initialize class io.seata.rm.datasource.undo.UndoLogParserFactory$SingletonHolder ##

接入Seata的时候 有报下面的错误

java.lang.NoClassDefFoundError: 
    Could not initialize class io.seata.rm.datasource.undo.UndoLogParserFactory$SingletonHolder

表面上看起来是那个异常，但是你打个断点进去查看会发现最终的异常是下面这个

java.lang.NoClassDefFoundError: 
    com/fasterxml/jackson/databind/ObjectMapper

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70 8]

**解决方案：加入jackson-databind依赖就行**

<dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.11.0</version>
            </dependency>

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欢迎 Star和 共建由 滴滴开源的kafka的管理平台,非常优秀非常好用的一款kafka管理平台  
满足所有开发运维日常需求

[滴滴开源Logi-KafkaManager 一站式Kafka监控与管控平台][Logi-KafkaManager _Kafka]

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![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA2MzQwNjY_size_16_color_FFFFFF_t_70_pic_center]

[Logi-KafkaManager _Kafka]: https://github.com/didi/LogiKM
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[20200621160956995.png]: https://img-blog.csdnimg.cn/20200621160956995.png
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[20200616152955744.png]: https://img-blog.csdnimg.cn/20200616152955744.png
[20200621163659476.png]: https://img-blog.csdnimg.cn/20200621163659476.png
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