seata-1.3.0 seata :no available service ‘null‘ found, please make sure registry config correct

问题原因：

应用启动时会按照事务分组在nacos中寻找相应的配置，然而在nacos中并没有相关的配置，所以出现以上报错信息

解决方案：

在nacos中配置事务分组相关的信息

nacos----配置列表--- 添加

Data ID：service.vgroupMapping.fsp_tx_group

Group:SEATA_GROUP

配置内容：default

fsp_tx_group这个时seata-server的file.conf文件中service模块中的配置项的值

service {
  #vgroup->rgroup vgroupMapping
  vgroup_mapping.my_test_tx_group = "fsp_tx_group"
  #only support single node
  default.grouplist = "192.168.0.149:8091"
  #degrade current not support
  enableDegrade = false
  #disable
  disable = false
  #unit ms,s,m,h,d represents milliseconds, seconds, minutes, hours, days, default permanent
  max.commit.retry.timeout = "-1"
  max.rollback.retry.timeout = "-1"
}