Seata1.2.0配置及分布式事务失效解决
配置
版本说明：
springCloud Alibaba组件版本关系
我用的是 cloud Alibaba 2.2.1.RELEASE 、springboot 2.2.5.RELEASE、nacos 1.2.1、seata1.2.0
1. 配置数据库
seata 主要的任务便是对数据库进行事务回滚，保证事务的一致性，所以我们需要先行配置数据库，seata需要一个进行事务管理的数据库用于自身使用。
MySQL中创建 seata 数据库，存储引擎为 InnoDB(默认)
-- the table to store GlobalSession data
drop table if exists `global_table`;
create table `global_table` (
`xid` varchar(128) not null,
`transaction_id` bigint,
`status` tinyint not null,
`application_id` varchar(32),
`transaction_service_group` varchar(32),
`transaction_name` varchar(128),
`timeout` int,
`begin_time` bigint,
`application_data` varchar(2000),
`gmt_create` datetime,
`gmt_modified` datetime,
primary key (`xid`),
key `idx_gmt_modified_status` (`gmt_modified`, `status`),
key `idx_transaction_id` (`transaction_id`)
);
-- the table to store BranchSession data
drop table if exists `branch_table`;
create table `branch_table` (
`branch_id` bigint not null,
`xid` varchar(128) not null,
`transaction_id` bigint ,
`resource_group_id` varchar(32),
`resource_id` varchar(256) ,
`lock_key` varchar(128) ,
`branch_type` varchar(8) ,
`status` tinyint,
`client_id` varchar(64),
`application_data` varchar(2000),
`gmt_create` datetime,
`gmt_modified` datetime,
primary key (`branch_id`),
key `idx_xid` (`xid`)
);
-- the table to store lock data
drop table if exists `lock_table`;
create table `lock_table` (
`row_key` varchar(128) not null,
`xid` varchar(96),
`transaction_id` long ,
`branch_id` long,
`resource_id` varchar(256) ,
`table_name` varchar(32) ,
`pk` varchar(36) ,
`gmt_create` datetime ,
`gmt_modified` datetime,
primary key(`row_key`)
);
2. 在涉及到的其它业务库中添加日志表 undo_log
该表用于事务回滚时，数据的恢复
-- the table to store seata xid data
-- 0.7.0+ add context
-- you must to init this sql for you business databese. the seata server not need it.
-- 此脚本必须初始化在你当前的业务数据库中，用于AT 模式XID记录。与server端无关（注：业务数据库）
-- 注意此处0.3.0+ 增加唯一索引 ux_undo_log
drop table `undo_log`;
CREATE TABLE `undo_log` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`branch_id` bigint(20) NOT NULL,
`xid` varchar(100) NOT NULL,
`context` varchar(128) NOT NULL,
`rollback_info` longblob NOT NULL,
`log_status` int(11) NOT NULL,
`log_created` datetime NOT NULL,
`log_modified` datetime NOT NULL,
`ext` varchar(100) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
3. 修改配置文件
3.1 file.conf
## seata-service
service {
#交易服务组映射 的组名称必须要与客户端一致 my_test_tx_group fsp_test_group必须要与registrt.conf 一致
#transaction service group mapping
vgroupMapping.my_test_tx_group = "fsp_test_group"
#only support when registry.type=file, please don't set multiple addresses
#这里设置ip, 一般不用改
default.grouplist = "127.0.0.1:8091"
#disable seata
disableGlobalTransaction = false
}
## transaction log store, only used in seata-server
store {
## store mode: file、db
##TODO 修改为数据库类型
mode = "db"
## file store property
file {
## store location dir
dir = "sessionStore"
# branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
maxBranchSessionSize = 16384
# globe session size , if exceeded throws exceptions
maxGlobalSessionSize = 512
# file buffer size , if exceeded allocate new buffer
fileWriteBufferCacheSize = 16384
# when recover batch read size
sessionReloadReadSize = 100
# async, sync
flushDiskMode = async
}
## database store property
#TODO 下面这一堆就安装自己MySQL去改就行了，使用的库便是我们上面创建的seata库
db {
## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.
datasource = "druid"
## mysql/oracle/postgresql/h2/oceanbase etc.
dbType = "mysql"
driverClassName = "com.mysql.jdbc.Driver"
url = "jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC"
user = "root"
password = "root"
minConn = 5
maxConn = 30
globalTable = "global_table"
branchTable = "branch_table"
lockTable = "lock_table"
queryLimit = 100
maxWait = 5000
}
}
3.2 registry.conf
registry {
# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
#TODO 配置为nacos
type = "nacos"
#TODO 设置你自己的nacos即可
nacos {
application = "fsp_test_group"
serverAddr = "localhost:8848"
namespace = "public"
cluster = "default"
username = "nacos"
password = "nacos"
}
eureka {
serviceUrl = "http://localhost:8761/eureka"
application = "default"
weight = "1"
}
redis {
serverAddr = "localhost:6379"
db = 0
password = ""
cluster = "default"
timeout = 0
}
zk {
cluster = "default"
serverAddr = "127.0.0.1:2181"
sessionTimeout = 6000
connectTimeout = 2000
username = ""
password = ""
}
consul {
cluster = "default"
serverAddr = "127.0.0.1:8500"
}
etcd3 {
cluster = "default"
serverAddr = "http://localhost:2379"
}
sofa {
serverAddr = "127.0.0.1:9603"
application = "default"
region = "DEFAULT_ZONE"
datacenter = "DefaultDataCenter"
cluster = "default"
group = "SEATA_GROUP"
addressWaitTime = "3000"
}
file {
name = "file.conf"
}
}
config {
# file、nacos 、apollo、zk、consul、etcd3
type = "nacos"
nacos {
serverAddr = "localhost:8848"
namespace = "public"
group = "SEATA_GROUP"
username = "nacos"
password = "nacos"
}
consul {
serverAddr = "127.0.0.1:8500"
}
apollo {
appId = "seata-server"
apolloMeta = "http://192.168.1.204:8801"
namespace = "application"
}
zk {
serverAddr = "127.0.0.1:2181"
sessionTimeout = 6000
connectTimeout = 2000
username = ""
password = ""
}
etcd3 {
serverAddr = "http://localhost:2379"
}
file {
name = "file.conf"
}
}
4. 启动 (先启动nacos，然后启动seata)
4.1 seata 启动
bin 目录下 seata-server.bat 直接双击
4.2 启动闪退解决
- 提示没有logs文件夹
解决：在bin同级目录下新建logs文件夹，在logs中新建seata_gc.log - 如果还是闪退的话就新建环境变量，path里面直接
E:\seata\bin，这个路径为seata目录
5. 配置Springboot
5.1 pom.xml
<dependency>
<groupId>com.alibaba.cloudgroupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discoveryartifactId>
dependency>
<dependency>
<groupId>com.alibaba.cloudgroupId>
<artifactId>spring-cloud-starter-alibaba-seataartifactId>
<exclusions>
<exclusion>
<groupId>io.seatagroupId>
<artifactId>seata-spring-boot-starterartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>io.seatagroupId>
<artifactId>seata-spring-boot-starterartifactId>
<version>1.2.0version>
<exclusions>
<exclusion>
<groupId>io.seatagroupId>
<artifactId>seata-allartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>io.seatagroupId>
<artifactId>seata-allartifactId>
<version>1.2.0version>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-openfeignartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.37version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>1.1.10version>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
5.2 配置文件
application.yml
server:
port: 2001
spring:
application:
name: seata-order-service
cloud:
nacos:
discovery:
server-addr: localhost:8848
username: nacos
password: nacos
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/seata_order?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
username: root
password: root
feign:
hystrix:
enabled: false
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.hbsi.entity
# seata的配置在这里
seata:
enabled: true
application-id: ${spring.application.name}
tx-service-group: my_test_tx_group
5.3 必须要配置 DruidDataSource 数据源，不配就报错
@Configuration
public class DBConfig {
@Bean
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource druidDataSource(){
return new DruidDataSource();
}
}
6. 使用 @GlobalTransactional 注解进行分布式事务管理
seata 事务失效常见场景
1. 无法获取XID
在每个微服务中调用 RootContext.getXID() 方法检查XID是否一致
1.1 解决方法1：
需要引用spring-cloud-starter-alibaba-seata依赖。这个依赖里才有xid传递的功能。 seata-spring-boot-starter依赖，并没有传递功能
1.2解决方法2：
在调用各个微服务时，直接将XID进行手动传参绑定RootContext.bind(XID);
2. Feign调用了fallback降级或异常处理
手动回滚 ：GlobalTransactionContext.reload(RootContext.getXID()).rollback()
手动提交：GlobalTransactionContext.reload(RootContext.getXID()).commit()
undo_log表有脏数据
清除undo_log表以及seata持久化数据库的brach_table、global_table、lock_table、undo_log表中的脏数据