javax.persistence.TransactionRequiredException: no transaction is in progress - Spring Batch - spring

Question

I am using Spring Boot & Batch example. In this example, I am reading data from XML and writing to MySQL database. Here is the source code: https://www.linkedin.com/pulse/spring-batch-read-xml-prateek-ashtikar/?published=t.
while running this example, I am getting below error -
javax.persistence.TransactionRequiredException: no transaction is in progress
at org.hibernate.internal.AbstractSharedSessionContract.checkTransactionNeededForUpdateOperation(AbstractSharedSessionContract.java:409) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.internal.SessionImpl.checkTransactionNeededForUpdateOperation(SessionImpl.java:3393) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1335) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1331) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_151]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_151]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_151]
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:368) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at com.sun.proxy.$Proxy69.flush(Unknown Source) ~[na:na]
at org.springframework.batch.item.database.JpaItemWriter.write(JpaItemWriter.java:94) ~[spring-batch-infrastructure-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.item.SimpleChunkProcessor.writeItems(SimpleChunkProcessor.java:193) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.item.SimpleChunkProcessor.doWrite(SimpleChunkProcessor.java:159) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.item.SimpleChunkProcessor.write(SimpleChunkProcessor.java:294) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.item.SimpleChunkProcessor.process(SimpleChunkProcessor.java:217) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:77) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:407) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:331) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140) ~[spring-tx-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:273) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:82) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:375) ~[spring-batch-infrastructure-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215) ~[spring-batch-infrastructure-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:145) ~[spring-batch-infrastructure-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:258) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:208) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148) [spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.job.AbstractJob.handleStep(AbstractJob.java:410) [spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.job.SimpleJob.doExecute(SimpleJob.java:136) [spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:319) [spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:147) [spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50) [spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:140) [spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_151]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_151]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_151]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) [spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) [spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) [spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) [spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) [spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) [spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at com.sun.proxy.$Proxy76.run(Unknown Source) [na:na]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.execute(JobLauncherCommandLineRunner.java:192) [spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.executeLocalJobs(JobLauncherCommandLineRunner.java:166) [spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.launchJobFromProperties(JobLauncherCommandLineRunner.java:153) [spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.run(JobLauncherCommandLineRunner.java:148) [spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:784) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:768) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:322) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at com.example.ReadingXmlApplication.main(ReadingXmlApplication.java:12) [classes/:na]
JobConfiguration:
package com.example.config;
import java.util.HashMap;
import java.util.Map;
import javax.persistence.EntityManagerFactory;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepScope;
import org.springframework.batch.core.launch.support.RunIdIncrementer;
import org.springframework.batch.item.ItemWriter;
import org.springframework.batch.item.database.JpaItemWriter;
import org.springframework.batch.item.xml.StaxEventItemReader;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.oxm.xstream.XStreamMarshaller;
import com.example.domain.Customer;
#Configuration
public class JobConfiguration {
#Autowired
private JobBuilderFactory jobBuilderFactory;
#Autowired
private StepBuilderFactory stepBuilderFactory;
#Autowired
EntityManagerFactory emf;
#Bean
public StaxEventItemReader<Customer> customerItemReader(){
Map<String, Class> aliases = new HashMap<>();
aliases.put("customer", Customer.class);
CustomerConverter converter = new CustomerConverter();
XStreamMarshaller ummarshaller = new XStreamMarshaller();
ummarshaller.setAliases(aliases);
ummarshaller.setConverters(converter);
StaxEventItemReader<Customer> reader = new StaxEventItemReader<>();
reader.setResource(new ClassPathResource("/data/customer.xml"));
reader.setFragmentRootElementName("customer");
reader.setUnmarshaller(ummarshaller);
return reader;
}
#Bean
public ItemWriter<Customer> customerItemWriter(){
return new CustomerItemWriter();
}
#Bean
public Step step1() {
return stepBuilderFactory.get("step1")
.<Customer, Customer>chunk(200)
.reader(customerItemReader())
.writer(customerItemWriter())
.build();
}
#Bean
public JpaItemWriter<Customer> writer() {
JpaItemWriter<Customer> writer = new JpaItemWriter<>();
writer.setEntityManagerFactory(emf);
return writer;
}
#Bean
public Job job() {
return jobBuilderFactory.get("job")
.start(step1())
.build();
}
}
CustomerItemWriter:
public class CustomerItemWriter implements ItemWriter<Customer> {
#Autowired
private CustomerRepository customerRepository;
#Override
#Transactional
public void write(List<? extends Customer> items) throws Exception {
List<Customer> customers = new ArrayList<>();
for (Customer customer : items) {
customers.add(customer);
}
customerRepository.saveAll(customers);
}
}

Answer 1

try using #Transactional(value=TxType.REQUIRES_NEW)

Answer 2

According to your configuration, you did not configure Spring Batch to use a specific transaction manager, so by default it will use a ResourcelessTransactionManager (or a DataSourceTransactionManager if you provide a datasource in your application context).
In your case, you are using a JpaItemWriter which requires a JPA transaction manager. So you need to configure Spring Batch to use a JpaTransactionManager.
Similar threads for reference:
JpaItemWriter: no transaction is in progress
Spring Batch:"No transaction is in progress" after switching to async JobLauncher