Hibernate 启发式完成：结果状态回滚；

我正在使用GORM工具将域对象映射到数据库，下面是代码：

public BatchJobMetaData getBatchJobMetaDataById(Integer batchJobMetaDataId){
    return BatchJobMetaData.get(batchJobMetaDataId)     
}   

我得到“启发式完成：结果状态回滚；”例外情况

完整异常轨迹：

Caused by: org.springframework.transaction.HeuristicCompletionException: Heuristic completion: outcome state is rolled back; nested exception is java.lang.NullPointerException
        at org.codehaus.groovy.grails.transaction.ChainedTransactionManager.commit(ChainedTransactionManager.java:174)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:478)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:272)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
        at com.cscglobal.dbstools.brandreports.service.PortfolioStrategyService$$EnhancerBySpringCGLIB$$2dc9d6ea.getPortfolioStrategInput(<generated>)
        at com.cscglobal.dbstools.brandreports.service.PortfolioStrategyService$getPortfolioStrategInput$0.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
        at com.cscglobal.dbstools.batch.brandreports.portfoliostrategy.PortfolioStrategyListItemReader.beforeStep(PortfolioStrategyListItemReader.groovy:31)
        ... 20 more
Caused by: java.lang.NullPointerException
        at org.springframework.orm.hibernate4.SpringSessionSynchronization.getCurrentSession(SpringSessionSynchronization.java:51)
        at org.springframework.orm.hibernate4.SpringSessionSynchronization.beforeCommit(SpringSessionSynchronization.java:85)
        at org.springframework.transaction.support.TransactionSynchronizationUtils.triggerBeforeCommit(TransactionSynchronizationUtils.java:95)
        at org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerBeforeCommit(AbstractPlatformTransactionManager.java:928)
        at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:740)
        at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726)
        at org.codehaus.groovy.grails.transaction.MultiTransactionStatus.commit(MultiTransactionStatus.java:73)
        at org.codehaus.groovy.grails.transaction.ChainedTransactionManager.commit(ChainedTransactionManager.java:147)

我也用过这个：

@Transactional(propagation = Propagation.REQUIRES_NEW)
public BatchJobMetaData getBatchJobMetaDataById(Integer batchJobMetaDataId){
    return BatchJobMetaData.get(batchJobMetaDataId)     
}

@Transactional(propagation = Propagation.REQUIRED)
public BatchJobMetaData getBatchJobMetaDataById(Integer batchJobMetaDataId){
    return BatchJobMetaData.get(batchJobMetaDataId)     
}

我也用过这个：

@Transactional(propagation = Propagation.REQUIRES_NEW)
public BatchJobMetaData getBatchJobMetaDataById(Integer batchJobMetaDataId){
    return BatchJobMetaData.get(batchJobMetaDataId)     
}

@Transactional(propagation = Propagation.REQUIRED)
public BatchJobMetaData getBatchJobMetaDataById(Integer batchJobMetaDataId){
    return BatchJobMetaData.get(batchJobMetaDataId)     
}

---

但仍有例外发生。你能帮我解决这个问题吗？

最后，我得到了答案：

使用WithTransaction是解决方案

public BatchJobMetaData getBatchJobMetaDataById(Integer batchJobMetaDataId){
        BatchJobMetaData batchJobMetaData = new BatchJobMetaData()
        BatchJobMetaData.withTransaction { status ->
            batchJobMetaData = BatchJobMetaData.get(batchJobMetaDataId)
         }
        return batchJobMetaData 
    }

---

最后，我得到了答案：

使用WithTransaction是解决方案

public BatchJobMetaData getBatchJobMetaDataById(Integer batchJobMetaDataId){
        BatchJobMetaData batchJobMetaData = new BatchJobMetaData()
        BatchJobMetaData.withTransaction { status ->
            batchJobMetaData = BatchJobMetaData.get(batchJobMetaDataId)
         }
        return batchJobMetaData 
    }

启发式完成和回滚可能是由回滚事务的失败MySQL查询引起的。有关详细信息，请参阅您的日志。有时，您可以看到查询在一台服务器上工作，而在另一台服务器上失败。在本例中，请尝试比较MYSQL模式，并删除一些语法更改模式，例如“”仅“完整”组“

要在服务器启动时设置SQL模式，请使用命令行上的

--SQL mode=“modes”

选项，或在选项文件（如

my.cnf

）中使用

SQL mode=“modes”

要在运行时更改SQL模式，请使用set语句设置全局或会话SQL_模式系统变量：

SET GLOBAL sql_mode = 'modes';
SET SESSION sql_mode = 'modes';

# Adding a mode to sql_mode:
SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));

# Removing a mode from sql_mode:
SET GLOBAL sql_mode=(SELECT CONCAT(@@sql_mode,',ONLY_FULL_GROUP_BY'));

启发式完成和回滚可能是由回滚事务的失败MySQL查询引起的。有关详细信息，请参阅您的日志。有时，您可以看到查询在一台服务器上工作，而在另一台服务器上失败。在本例中，请尝试比较MYSQL模式，并删除一些语法更改模式，例如“”仅“完整”组“

要在服务器启动时设置SQL模式，请使用命令行上的

--SQL mode=“modes”

选项，或在选项文件（如

my.cnf

）中使用

SQL mode=“modes”

要在运行时更改SQL模式，请使用set语句设置全局或会话SQL_模式系统变量：

SET GLOBAL sql_mode = 'modes';
SET SESSION sql_mode = 'modes';

# Adding a mode to sql_mode:
SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));

# Removing a mode from sql_mode:
SET GLOBAL sql_mode=(SELECT CONCAT(@@sql_mode,',ONLY_FULL_GROUP_BY'));