一、背景
最近在整合seata的过程中，发现如果业务表中存在 datetime 的数据类型，那么在分布式事务中，修改这个字段的值时，会出现如下错误。此处提供2种解决方案。
com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Type id handling not implemented for type java.lang.Object (by serializer of type com.fasterxml.jackson.databind.ser.impl.UnsupportedTypeSerializer) (through reference chain: io.seata.rm.datasource.undo.BranchUndoLog["sqlUndoLogs"]->java.util.ArrayList[0]->io.seata.rm.datasource.undo.SQLUndoLog["beforeImage"]->io.seata.rm.datasource.sql.struct.TableRecords["rows"]->java.util.ArrayList[0]->io.seata.rm.datasource.sql.struct.Row["fields"]->java.util.ArrayList[2]->io.seata.rm.datasource.sql.struct.Field["value"])
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1276) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:400) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.JsonSerializer.serializeWithType(JsonSerializer.java:160) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:730) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeWithType(BeanSerializerBase.java:655) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:147) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:25) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.serializeWithType(AsArraySerializerBase.java:267) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:730) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeWithType(BeanSerializerBase.java:655) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:147) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:25) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.serializeWithType(AsArraySerializerBase.java:267) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:730) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeWithType(BeanSerializerBase.java:655) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:730) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeWithType(BeanSerializerBase.java:655) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:147) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:25) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.serializeWithType(AsArraySerializerBase.java:267) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:730) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeWithType(BeanSerializerBase.java:655) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.impl.TypeWrappedSerializer.serialize(TypeWrappedSerializer.java:32) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ObjectMapper._writeValueAndClose(ObjectMapper.java:4487) ~[jackson-databind-2.12.4.jar:2.12.4]
at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsBytes(ObjectMapper.java:3765) ~[jackson-databind-2.12.4.jar:2.12.4]
at io.seata.rm.datasource.undo.parser.JacksonUndoLogParser.encode(JacksonUndoLogParser.java:152) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.rm.datasource.undo.AbstractUndoLogManager.flushUndoLogs(AbstractUndoLogManager.java:230) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.rm.datasource.ConnectionProxy.processGlobalTransactionCommit(ConnectionProxy.java:255) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.rm.datasource.ConnectionProxy.doCommit(ConnectionProxy.java:230) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.rm.datasource.ConnectionProxy.lambda$commit$0(ConnectionProxy.java:188) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.rm.datasource.ConnectionProxy$LockRetryPolicy.execute(ConnectionProxy.java:333) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.rm.datasource.ConnectionProxy.commit(ConnectionProxy.java:187) ~[seata-all-1.4.2.jar:1.4.2]
at org.springframework.jdbc.datasource.DataSourceTransactionManager.doCommit(DataSourceTransactionManager.java:333) ~[spring-jdbc-5.3.9.jar:5.3.9]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743) ~[spring-tx-5.3.9.jar:5.3.9]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711) ~[spring-tx-5.3.9.jar:5.3.9]
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:654) ~[spring-tx-5.3.9.jar:5.3.9]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:407) ~[spring-tx-5.3.9.jar:5.3.9]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.9.jar:5.3.9]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.9.jar:5.3.9]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-5.3.9.jar:5.3.9]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692) ~[spring-aop-5.3.9.jar:5.3.9]
at com.huan.seata.service.impl.AccountServiceImpl$$EnhancerBySpringCGLIB$$20806094.debit(<generated>) ~[classes/:na]
at com.huan.seata.controller.AccountController.debit(AccountController.java:28) ~[classes/:na]
at com.huan.seata.controller.AccountController$$FastClassBySpringCGLIB$$7c176670.invoke(<generated>) ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.3.9.jar:5.3.9]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779) ~[spring-aop-5.3.9.jar:5.3.9]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.3.9.jar:5.3.9]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-5.3.9.jar:5.3.9]
at io.seata.spring.annotation.GlobalTransactionalInterceptor$2.execute(GlobalTransactionalInterceptor.java:184) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.tm.api.TransactionalTemplate.execute(TransactionalTemplate.java:127) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.spring.annotation.GlobalTransactionalInterceptor.handleGlobalTransaction(GlobalTransactionalInterceptor.java:181) ~[seata-all-1.4.2.jar:1.4.2]
at io.seata.spring.annotation.GlobalTransactionalInterceptor.invoke(GlobalTransactionalInterceptor.java:150) ~[seata-all-1.4.2.jar:1.4.2]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.9.jar:5.3.9]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-5.3.9.jar:5.3.9]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692) ~[spring-aop-5.3.9.jar:5.3.9]
at com.huan.seata.controller.AccountController$$EnhancerBySpringCGLIB$$b98db7f4.debit(<generated>) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_192]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_192]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_192]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_192]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.9.jar:5.3.9]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1064) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.9.jar:5.3.9]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.52.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.9.jar:5.3.9]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.52.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.52.jar:9.0.52]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.9.jar:5.3.9]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.9.jar:5.3.9]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.9.jar:5.3.9]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1726) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.52.jar:9.0.52]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.52.jar:9.0.52]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_192]
复制代码此处使用的Seata的版本是1.4.2
二、解决方案
1、数据库中不使用 datetime 数据类型
经过测试，发现 datetime 类型会出现问题，那么如果我们不使用这个类型，使用timestamp类型代替，发现就可以解决问题。
2、修改undo_log默认的序列化方式
我们知道，undo_log 默认的序列化方式 jackson，在seata中使用jackson序列化方式会有问题，那么我们修改 kryo 序列化方式就可以解决这个问题。
1、配置文件中引入 kryo
<dependency>
<groupId>com.esotericsoftware</groupId>
<artifactId>kryo</artifactId>
<version>4.0.2</version>
</dependency>
<dependency>
<groupId>de.javakaffee</groupId>
<artifactId>kryo-serializers</artifactId>
<version>0.42</version>
</dependency>
复制代码2、seata server 配置中修改undolog的序列化方式
注意：
- 经过测试修改了在seata的配置中心中修改了
client.undo.logSerialization属性的值，业务程序需要重启，否则获取不到新的值。
到此就解决了undo_log中的日期序列化问题.
三、小知识点
1、undo_log的序列化方式是何时初始化的
package io.seata.rm.datasource.undo;
import io.seata.config.ConfigurationFactory;
import io.seata.core.constants.ConfigurationKeys;
import static io.seata.common.DefaultValues.DEFAULT_TRANSACTION_UNDO_LOG_SERIALIZATION;
public interface UndoLogConstants {
String SERIALIZER_KEY = "serializer";
# 此处从配置中心中获取undo_log的序列化方式
String DEFAULT_SERIALIZER = ConfigurationFactory.getInstance()
.getConfig(ConfigurationKeys.TRANSACTION_UNDO_LOG_SERIALIZATION, DEFAULT_TRANSACTION_UNDO_LOG_SERIALIZATION);
String COMPRESSOR_TYPE_KEY = "compressorType";
}
复制代码2、何时序列化undo_log
四、完整代码
1、seata server 配置
service.vgroupMapping.tx_account_service_group=default
store.mode=db
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.jdbc.Driver
store.db.url=jdbc:mysql://10.1.206.128:3306/seata?useUnicode=true&rewriteBatchedStatements=true
store.db.user=root
store.db.password=root
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.distributedLockTable=distributed_lock
store.db.queryLimit=100
store.db.lockTable=lock_table
store.db.maxWait=5000
# 注意这个属性的值
client.undo.logSerialization=kryo
复制代码2、建表语句
注意： account_date 表中的 update_time是 datetime类型，数据修改时，会修改该字段的值。
create table account_date(
id int unsigned auto_increment primary key comment '主键',
name varchar(20) comment '用户名',
balance bigint comment '账户余额,单位分',
create_time datetime comment '创建时间',
update_time datetime comment '修改时间'
) engine=InnoDB comment '账户表';
insert into account_date(id,name,balance,create_time,update_time) values (1,'张三',100000,now(),now());
CREATE TABLE IF NOT EXISTS `undo_log`
(
`branch_id` BIGINT NOT NULL COMMENT 'branch transaction id',
`xid` VARCHAR(128) NOT NULL COMMENT 'global transaction id',
`context` VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization',
`rollback_info` LONGBLOB NOT NULL COMMENT 'rollback info',
`log_status` INT(11) NOT NULL COMMENT '0:normal status,1:defense status',
`log_created` DATETIME(6) NOT NULL COMMENT 'create datetime',
`log_modified` DATETIME(6) NOT NULL COMMENT 'modify datetime',
UNIQUE KEY `ux_undo_log` (`xid`, `branch_id`)
) ENGINE = InnoDB COMMENT ='AT transaction mode undo table';
复制代码