SpringBoot踩坑日记

1.Closing JPA EntityManagerFactory for persistence unit 'default'错误导致springboot启动后终止

------------------->

2019-01-22 17:18:34.941  INFO 42978 --- [      Thread-13] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'

2019-01-22 17:18:34.945  INFO 42978 --- [      Thread-13] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...

2019-01-22 17:18:35.181  INFO 42978 --- [      Thread-13] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.

解决办法

在依赖中添加spring-boot-starter-web

例如Gradle在build.gradle中添加

implementation 'org.springframework.boot:spring-boot-starter-web'

问题解决

<------------------- 2019.1.22

2.Gradle加载依赖很慢，换成国内源

--------------->

repositories {

    //使用国内源下载依赖

    maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }

    mavenCentral()

}

替换之后重新Gradle下

<----------------2019-01-23

3.Gradle加载出错，错误如下

startup failed:

build file '/Users/cuifuan/workspaces/springcloud-tools/tools-eureka/build.gradle': 4: all buildscript {} blocks must appear before any plugins {} blocks in the script

See https://docs.gradle.org/5.0/userguide/plugins.html#sec:plugins_block for information on the plugins {} block

 @ line 4, column 1.

   buildscript {

   ^

1 error

Open File

经过一番排查

//删去下面代码，如果存在，我也不知道为什么

plugins {

    id 'java'

}

4.feign依赖不存在

feign 声明式调用

Feign makes writing java http clients easier

之前安装依赖

dependencies{

    compile "org.springframework.cloud:spring-cloud-starter-feign"

    compile "org.springframework.cloud:spring-cloud-starter-eureka"

}

springboot2.0之后

dependencies {

    implementation "org.springframework.cloud:spring-cloud-starter-openfeign"

    implementation 'org.springframework.cloud:spring-cloud-starter-eureka-server'

}

5. com.netflix.client.ClientException: Load balancer does not have available server for client: sp

build.gradle

dependencies {

    implementation "org.springframework.cloud:spring-cloud-starter-openfeign"

//应是eureka-client

    implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'

}

6.解决报错 javax.persistence.TransactionRequiredException: Executing an update/delete query

运行报错原因：少了一个注解：@Transactional ：要求开启事物管理

巴特西