This is the 23rd day of my participation in the August More Text Challenge

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Pit 1 No available service ‘default’ found

i.s.c.r.netty.NettyClientChannelManager : No available service ‘null’ found, please make sure registry config correct or no available service ‘default’ found, please make sure registry config correct

The cause of this problem is that seata-server was not found;

1. Verify that seata-Server is started

2. Ensure that the connection configuration is correct when the client is started

Such as:seata-serverThe registry selected is Redis;Configure cluster = default Check the value of Redis after successful registrationVerify that the client configuration is correctIf all of the above is correct, but there is still a problem, please make sure you are manually configuredGlobalTransactionScannerVerify that the txServiceGroup parameter is the same as the configuration. The following

Pit 2 com. Alibaba. Nacos. API. Exception. NacosException

Seata uses Nacos when using the registry, startup error reported

Caused by: java.lang.ClassNotFoundException: com.alibaba.nacos.api.exception.NacosException at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~ [na: 1.8.0 comes with _221] at Java lang. This. The loadClass (424). This Java: ~ [na: 1.8.0 comes with _221] the at Sun. Misc. The Launcher $AppClassLoader. LoadClass (349). The Launcher Java: ~ [na: 1.8.0 comes with _221] the at Java. Lang. This. LoadClass (357). This Java: ~ [na: 1.8.0 comes with _221]... 39 common frames omittedCopy the code

Seata-all is used when the corresponding JAR package is introduced<scope>provide</scope> We need to introduce corresponding dependencies; Introduction on demand;

Similarly, if you use the Redis registry, you should also introduce the Redis client

<! If the registry chooses NACOS, import the following package --> <! -- https://mvnrepository.com/artifact/com.alibaba.nacos/nacos-client --> <dependency> <groupId> com.baba.nacos </groupId> <artifactId>nacos-client</artifactId> <version>1.3.0</version> </dependency> <! Clients </groupId> <artifactId>jedis</artifactId> The < version > 2.9.0 < / version > < / dependency >Copy the code

Pit 3 NotSupportYetException: NotSupport Register Type: null

During seATA’s introduction, the following error was reported during startup


 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

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His reason isSpringApplicationContextProviderIt was not executed

Because mine is usingseata-spring-boot-starterMode to start; And then hand cheap configurationGlobalTransactionScanner Then thisGlobalTransactionScannerWhen I start loading,SpringApplicationContextProviderIt’s not being implemented;GlobalTransactionScannerNeed to depend onSpringApplicationContextProvider, so the error was reported

Solutions:seata-spring-boot-starterMode boot has been automatically loadedGlobalTransactionScanner 见SeataAutoConfiguration Annotate if you must manually load it yourself


@DependsOn({BEAN_NAME_SPRING_APPLICATION_CONTEXT_PROVIDER, BEAN_NAME_FAILURE_HANDLER})

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However, manual configuration is not necessary

GlobalTransactionScanner needs to be configured manually when seata-all is used, but no additional operations are required when Seata-spring-boot-starter is used.

Pit 4 Can not register RM,err: Can not connect to services-server.

It had been fine before, but after a few days, I reported this error. Then I looked at the registry and registered several IP addresses. They are all registered before, I don’t know why they haven’t been cleared;

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

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Solution: Delete the key and restart seata-server

5 the pit Could not initialize class IO. Seata. Rm. The datasource. Undo. $SingletonHolder UndoLogParserFactory

The following error was reported while accessing Seata


java.lang.NoClassDefFoundError: 
Could not initialize class io.seata.rm.datasource.undo.UndoLogParserFactory$SingletonHolder
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On the surface, it looks like that exception, but if you hit a breakpoint and look inside, you’ll see that the final exception is the one below

java.lang.NoClassDefFoundError: 
com/fasterxml/jackson/databind/ObjectMapper
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Solution: Just add the Jackson-Databind dependency

<! The undo serialization method selects which jar package to rely on --> <! -- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind --> <dependency> < the groupId > com. Fasterxml. Jackson. Core < / groupId > < artifactId > Jackson - databind < / artifactId > < version > 2.11.0 < / version > </dependency>Copy the code








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