java - Spring批量默认重试策略

Question

我有以下批量 Spring 配置。当特定用例引发不可跳过的异常时，我遇到了生产批处理的问题。当我在集成测试中重现用例时，批处理行为仍然很奇怪。 当我的batch.commit-interval属性大于1时，会触发重试机制，回滚未提交的 block 并重新处理之前的所有记录。当batch-commit-interval设置为1时，一旦抛出不可跳过的异常，批处理就会失败。

我尝试了批量提交间隔和重试限制的各种值。导致该问题的特定异常是 NullPointerException。 我的目标是最好使用 NeverRetryPolicy 处理该异常，如果没有，则使用经典的异常处理。我不希望重试失败的项目处理，因此我什至使用了 NeverRetryPolicy。但似乎整个事情最终是由批量提交间隔驱动的(使用重试限制、可重试异常类和 NeverRetryPolicy，似乎没有效果)

我已经从 StackOverflow 阅读了其他类似的问题。感谢您的帮助。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:batch="http://www.springframework.org/schema/batch"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=" http://www.springframework.org/schema/beans
                     http://www.springframework.org/schema/beans/spring-beans.xsd
                     http://www.springframework.org/schema/context
                     http://www.springframework.org/schema/context/spring-context.xsd
                     http://www.springframework.org/schema/batch
                     http://www.springframework.org/schema/batch/spring-batch.xsd">


<!--================ JOB & STEPS ================ -->   
<batch:job id="BEL-batch-Retry-Tests">

    <batch:step id="mainRetryTests" >
        <batch:tasklet>
            <batch:chunk  reader="jpaReaderRetryTests" processor="bdToFlatFileProcessorRetryTests" writer="flatWriterRetryTests" commit-interval="${batch.commit-interval}" skip-limit="${batch.skip-limit}">

                <batch:streams>
                    <batch:stream ref="flatWriterRetryTests" />
                </batch:streams>
                <batch:skippable-exception-classes>
                    <batch:include
                        class="org.springframework.batch.item.file.FlatFileParseException" />
                    <batch:include class="ma.awb.ebk.bel.batch.EntiteBatchInvalideException" />
                </batch:skippable-exception-classes>
            </batch:chunk>
            <batch:listeners>

                <batch:listener ref="stepListener"/>
                <batch:listener ref="skipListener"/>
            </batch:listeners>
        </batch:tasklet>

        <batch:listeners>
            <batch:listener ref="stepListener"/>
            <batch:listener ref="skipListener"/>
        </batch:listeners>
    </batch:step>

    <batch:listeners>
        <batch:listener ref="jobListener"/>
    </batch:listeners>
</batch:job>
<!--================ READERS & WRITERS ================-->

<bean id="jpaReaderRetryTests" class="org.springframework.batch.item.database.JpaPagingItemReader">
    <property name="entityManagerFactory" ref="entityManagerFactoryBel"/>
    <property name="queryString" value="select c from CaracteristiquesCarte c"/>
    <property name="pageSize" value="100"/>
</bean>

<bean id="flatWriterRetryTests" class="org.springframework.batch.item.file.FlatFileItemWriter" scope="step">
    <property name="resource" value="file:${retry-tests.outputfile.basename}-#{jobParameters['runDate']}${retry-tests.outputfile.ext}" />
    <property name="lineAggregator">
             <bean
                 class="org.springframework.batch.item.file.transform.DelimitedLineAggregator">
                 <property name="delimiter" value="${batch.file.writer.delimiter}" />
                 <property name="fieldExtractor">
                     <bean
                         class="org.springframework.batch.item.file.transform.BeanWrapperFieldExtractor">
                         <property name="names" value="codeProduit,nomCarte,codeAAfficher,rechargeable" />
                     </bean>
                 </property>
             </bean>
     </property>

</bean>



<bean id="bdToFlatFileProcessorRetryTests" class="ma.awb.ebk.bel.batch.retry.BDToFlatFileRetryProcessor" />

读者和作者都很经典。这是处理器的代码

package ma.awb.ebk.bel.batch.retry;

import ma.awb.ebk.bel.domain.CaracteristiquesCarte;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.item.ItemProcessor;



public class BDToFlatFileRetryProcessor implements   ItemProcessor<CaracteristiquesCarte, CaracteristiquesCarte> {

private static int counter = 0;
private static final Logger LOGGER = LoggerFactory.getLogger (BDToFlatFileRetryProcessor.class);


@Override
public CaracteristiquesCarte process(CaracteristiquesCarte  caracteristiques)
        throws Exception {

    String witness = null;
    counter++;

    System.out.println("DEBUGGING iteration N° " +  counter+" "+caracteristiques.getCodeProduit());

    // Tester le cas d'un renvoie de null
    if (counter == 4) {
        System.out.println("PETTAGE " + counter);
        String test = witness.substring(2);

    }

    return caracteristiques;
}

}

Answer 1

我看到的问题之一是你得到了空指针，这永远不应该发生。如果修复它会发生什么？休息看起来像是批处理所需的行为。