问题
I am tired of banging my head around this problem So if anyone could suggest me where I am wrong I'll be grateful.
The problem is I am using Spring-Batch and Hibernate Full-Text Search in my Spring MVC project.So from the batch job Tasklet I am calling following code:
A a=aDao.merge(a);
b.setA(a);
bDao.save(b);
While doing the save update on these entites I am getting an exception and the stacktrace is as follows:
org.springframework.orm.hibernate3.HibernateSystemException: Error while indexing in Hibernate Search (before transaction completion); nested exception is org.hibernate.HibernateException: Error while indexing in Hibernate Search (before transaction completion)
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:690)
at org.springframework.orm.hibernate3.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:793)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:664)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:147)
at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:264)
at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:76)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:367)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:214)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:143)
at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:250)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:195)
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:135)
at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:61)
at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:60)
at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:144)
at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:124)
at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:135)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:281)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:120)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: org.hibernate.HibernateException: Error while indexing in Hibernate Search (before transaction completion)
at org.hibernate.search.backend.impl.EventSourceTransactionContext$DelegateToSynchronizationOnBeforeTx.doBeforeTransactionCompletion(EventSourceTransactionContext.java:175)
at org.hibernate.engine.ActionQueue$BeforeTransactionCompletionProcessQueue.beforeTransactionCompletion(ActionQueue.java:543)
at org.hibernate.engine.ActionQueue.beforeTransactionCompletion(ActionQueue.java:216)
at org.hibernate.impl.SessionImpl.beforeTransactionCompletion(SessionImpl.java:571)
at org.hibernate.jdbc.JDBCContext.beforeTransactionCompletion(JDBCContext.java:250)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:138)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:656)
... 21 more
Caused by: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:167)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:215)
at org.hibernate.search.util.HibernateHelper.unproxy(HibernateHelper.java:62)
at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:394)
at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:481)
at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:481)
at org.hibernate.search.engine.DocumentBuilderIndexedEntity.getDocument(DocumentBuilderIndexedEntity.java:379)
at org.hibernate.search.engine.DocumentBuilderIndexedEntity.createAddWork(DocumentBuilderIndexedEntity.java:317)
at org.hibernate.search.engine.DocumentBuilderIndexedEntity.addWorkToQueue(DocumentBuilderIndexedEntity.java:295)
at org.hibernate.search.engine.WorkPlan$PerEntityWork.enqueueLuceneWork(WorkPlan.java:445)
at org.hibernate.search.engine.WorkPlan$PerClassWork.enqueueLuceneWork(WorkPlan.java:246)
at org.hibernate.search.engine.WorkPlan.getPlannedLuceneWork(WorkPlan.java:150)
at org.hibernate.search.backend.WorkQueue.prepareWorkPlan(WorkQueue.java:134)
at org.hibernate.search.backend.impl.BatchedQueueingProcessor.prepareWorks(BatchedQueueingProcessor.java:124)
at org.hibernate.search.backend.impl.PostTransactionWorkQueueSynchronization.beforeCompletion(PostTransactionWorkQueueSynchronization.java:89)
at org.hibernate.search.backend.impl.EventSourceTransactionContext$DelegateToSynchronizationOnBeforeTx.doBeforeTransactionCompletion(EventSourceTransactionContext.java:172)
... 27 more
I am not getting whats gone wrong.I am using org.springframework.orm.hibernate3.HibernateTransactionManager and my Spring version is 3.2 Hibernate core version is 3.6 final.
Note :This exception occurs often but When I create a new tables or use fresh db it works like charm and all modification/insertion are getting reflected properly in database.Can somebody explain me this behavior or Have i done something fishy.
Tell me if you need more details.
Thank you.
Code Update:
<batch:job-repository id="jobRepository"
data-source="myJNDI"
transaction-manager="transactionManager"
isolation-level-for-create="READ_COMMITTED"
max-varchar-length="2500"
lob-handler="defaultLobHandler"
/>
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="safeSessionFactory" />
</bean>
Like this I am configuring transaction manager in applicationContext.xml for Spring-Batch.And I have tried doing this with manually opening and closing session with manual commit of transaction but the exception remains same.And yes I have annotated my method as @Transactional.
回答1:
I found the root cause of problem is Spring's Declarative Transaction Management. Spring Batch in Action Reference:
Disable Spring’s declarative transactions for your batch application—Don’t use the tx:annotation-driven element or any XML configuration related to declara- tive transaction management.
Be careful using propagation levels if declarative transactions are on—If you call trans- actional classes from a Spring Batch job, Spring’s transaction propagation can interfere with the Spring Batch transaction because of the propagation level. The REQUIRES_NEW propagation level could typically cause problems because the application code runs in its own transaction, independent of the Spring Batch transaction.
The following are guidelines to avoid conflict between Spring Batch–managed and Spring-managed transactions:
来源：https://stackoverflow.com/questions/14197633/error-while-indexing-in-hibernate-search-before-transaction-completion