我正在使用Spring批处理（从数据库表中读取并写入另一个表）作业
作业由Quartz安排，数据库是oracle，它是c3p0，我的读者没有打开异常
这是工作环境
<batch:job id="readyReqPoolJob">
<batch:step id="readyReqPoolStep">
<batch:tasklet>
<batch:chunk reader="readyReqPoolReader" writer="readyReqPoolWrtiter"
commit-interval="1000" />
</batch:tasklet>
</batch:step>
</batch:job>
<!-- ======================================================= -->
<!-- 6) READER -->
<!-- ======================================================= -->
<bean id="readyReqPoolReader"
class="org.springframework.batch.item.database.JdbcCursorItemReader">
<property name="dataSource" ref="dataSource" />
<property name="sql" value="select * from SF_ILA_Ready_Request_Pool" />
<property name="rowMapper" ref="ReadyReqPoolRowMapper" />
</bean>
<bean id="readyReqPoolWrtiter"
class="com.mobily.housekeepingservice.readyrequestpoolarchive.ReadyReqPoolArchiveWriter" />
<bean id="jobDetail" class="org.springframework.scheduling.quartz.JobDetailBean">
<property name="jobClass"
value="org.springframework.batch.sample.quartz.JobLauncherDetails" />
<property name="jobDataAsMap">
<map>
<entry key="jobName" value="readyReqPoolJob" />
<entry key="jobLocator" value-ref="jobRegistry" />
<entry key="jobLauncher" value-ref="jobLauncher" />
</map>
</property>
</bean>
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<bean id="cronTrigger"
class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail" ref="jobDetail" />
<property name="cronExpression" value="0 0/5 * * * ?" />
</bean>
</property>
</bean>
主要背景是：
<import resource="classpath:spring/batch/config/readyReqPoolContext.xml" />
<import resource="classpath:spring/batch/config/jdbc.commons.xml" />
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource" />
</bean>
<bean
class="org.springframework.batch.core.configuration.support.JobRegistryBeanPostProcessor">
<property name="jobRegistry" ref="jobRegistry" />
</bean>
<bean id="jobRegistry"
class="org.springframework.batch.core.configuration.support.MapJobRegistry" />
<bean id="jobRepository"
class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean">
<property name="transactionManager" ref="transactionManager" />
</bean>
<!-- 4) LAUNCH JOBS FROM A REPOSITORY -->
<bean id="jobLauncher"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
<property name="taskExecutor" ref="taskExecutor" />
</bean>
<bean id="taskExecutor" class="org.springframework.core.task.SimpleAsyncTaskExecutor" />
例外是：
09:59:20,108 INFO ClassPathXmlApplicationContext:510 - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@99436c6: startup date [Sun Mar 02 09:59:20 AST 2014]; root of context hierarchy
09:59:20,159 INFO XmlBeanDefinitionReader:315 - Loading XML bean definitions from class path resource [spring/batch/config/mainContext.xml]
09:59:20,285 INFO XmlBeanDefinitionReader:315 - Loading XML bean definitions from class path resource [spring/batch/config/readyReqPoolContext.xml]
09:59:20,379 INFO DefaultListableBeanFactory:663 - Overriding bean definition for bean 'readyReqPoolJob': replacing [Generic bean: class [org.springframework.batch.core.configuration.xml.SimpleFlowFactoryBean]; scope=; abstract=false; lazyInit=false
; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] with [Generic bean: class [org.springframework.batch.core.configuration.xml.JobPars
erJobFactoryBean]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null]
09:59:20,383 INFO XmlBeanDefinitionReader:315 - Loading XML bean definitions from class path resource [spring/batch/config/jdbc.commons.xml]
09:59:20,744 INFO ClassPathXmlApplicationContext:1374 - Bean 'jobRegistry' of type [class org.springframework.batch.core.configuration.support.MapJobRegistry] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible
for auto-proxying)
09:59:20,759 INFO ClassPathXmlApplicationContext:1374 - Bean 'org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0' of type [class org.springframework.transaction.annotation.AnnotationTransactionAttributeSource] is not e
ligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
09:59:20,761 INFO ClassPathXmlApplicationContext:1374 - Bean 'org.springframework.transaction.config.internalTransactionAdvisor' of type [class org.springframework.transaction.interceptor.BeanFactoryTransactionAttributeSourceAdvisor] is not eligible
for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
09:59:20,778 INFO DefaultListableBeanFactory:596 - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@53ddc692: defining beans [org.springframework.batch.core.scope.internalStepScope,org.springframew
ork.beans.factory.config.CustomEditorConfigurer,org.springframework.batch.core.configuration.xml.CoreNamespacePostProcessor,readyReqPoolStep,readyReqPoolJob,readyReqPoolReader,readyReqPoolWrtiter,jobDetail,org.springframework.scheduling.quartz.Schedu
lerFactoryBean#0,dataSource,appJobExecutionListener,exceptionLogArchiveDAOImp,ExceptionLogRowMapper,exceptionLogWriter,itemFailureLoggerListener,log4jDebugArchiveDAOImp,log4jDebugArchiveWriter,Log4jDebugRowMapper,log4jErrorArchiveDAOImp,log4jErrorArc
hiveWriter,Log4jErrorRowMapper,log4jFatalArchiveDAOImp,log4jFatalArchiveWriter,Log4jFatalRowMapper,log4jInfoArchiveDAOImp,log4jInfoArchiveWriter,Log4jInfoRowMapper,log4jTraceArchiveDAOImp,log4jTraceArchiveWriter,Log4jTraceRowMapper,log4jWarnArchiveDA
OImp,log4jWarnArchiveWriter,Log4jWarnRowMapper,readyReqPoolArchiveDAOImp,readyReqPoolArchiveWriter,ReadyReqPoolRowMapper,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAu
towiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,transactionManager,org.springframework.aop.config.internalAutoProxyCreator,
org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,jdbcTemplate,org.springframework.
batch.core.configuration.support.JobRegistryBeanPostProcessor#0,jobRegistry,jobRepository,jobLauncher,taskExecutor,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy
09:59:20,812 INFO MLog:80 - MLog clients using log4j logging.
09:59:20,911 INFO C3P0Registry:204 - Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]
09:59:21.296 [main] INFO org.quartz.impl.StdSchedulerFactory - Using default implementation for ThreadExecutor
09:59:21.312 [main] INFO o.quartz.core.SchedulerSignalerImpl - Initialized Scheduler Signaller of type: class org.quartz.core.SchedulerSignalerImpl
09:59:21.314 [main] INFO org.quartz.core.QuartzScheduler - Quartz Scheduler v.1.8.6 created.
09:59:21.315 [main] INFO org.quartz.simpl.RAMJobStore - RAMJobStore initialized.
09:59:21.315 [main] INFO org.quartz.core.QuartzScheduler - Scheduler meta-data: Quartz Scheduler (v1.8.6) 'org.springframework.scheduling.quartz.SchedulerFactoryBean#0' with instanceId 'NON_CLUSTERED'
Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.
NOT STARTED.
Currently in standby mode.
Number of jobs executed: 0
Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 10 threads.
Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.
09:59:21.316 [main] INFO org.quartz.impl.StdSchedulerFactory - Quartz scheduler 'org.springframework.scheduling.quartz.SchedulerFactoryBean#0' initialized from an externally provided properties instance.
09:59:21.316 [main] INFO org.quartz.impl.StdSchedulerFactory - Quartz scheduler version: 1.8.6
09:59:21.317 [main] INFO org.quartz.core.QuartzScheduler - JobFactory set to: org.springframework.scheduling.quartz.AdaptableJobFactory@1fe0d622
09:59:21,491 INFO DefaultLifecycleProcessor:334 - Starting beans in phase 2147483647
09:59:21,491 INFO SchedulerFactoryBean:648 - Starting Quartz Scheduler now
09:59:21.491 [main] INFO org.quartz.core.QuartzScheduler - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED started.
09:59:21,532 INFO AbstractPoolBackedDataSource:462 - Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 1, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -
> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> 2rzno590zyfq8arapgjr|2022d1f4, debugUnreturnedCon
nectionStackTraces -> false, description -> null, driverClass -> oracle.jdbc.driver.OracleDriver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> 2rzno590zyfq8arapgjr|2022d1f4, idleConnectionTestPeriod -> 10
000, initialPoolSize -> 4, jdbcUrl -> jdbc:oracle:thin:@10.14.11.186:1522:EMADEV, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 12, maxStatements -> 0, maxStatementsPerConne
ction -> 0, minPoolSize -> 8, numHelperThreads -> 3, numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery -> SELECT 1 FROM DUAL, properties -> {user=******, password=******}, propertyCycle -> 0, testConnectionOnCheckin -> false, testConnect
ionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false ]
Exit Status : STARTING
Done
09:59:22,170 INFO SimpleJobLauncher:132 - Job: [FlowJob: [name=readyReqPoolJob]] launched with the following parameters: [{time=1393743561493}]
09:59:22,272 INFO SimpleStepHandler:135 - Executing step: [readyReqPoolStep]
09:59:22.314 [Timer-0] DEBUG org.quartz.utils.UpdateChecker - Checking for available updated version of Quartz...
10:00:00.011 [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-1] DEBUG org.quartz.core.JobRunShell - Calling execute on job DEFAULT.jobDetail
10:00:00,017 INFO JobLauncherDetails:69 - Quartz trigger firing with Spring Batch jobName=readyReqPoolJob
10:00:00,051 INFO SimpleJobLauncher:132 - Job: [FlowJob: [name=readyReqPoolJob]] launched with the following parameters: [{}]
10:00:00,104 INFO SimpleStepHandler:135 - Executing step: [readyReqPoolStep]
10:00:00,112 ERROR AbstractStep:222 - Encountered an error executing the step
org.springframework.batch.item.ItemStreamException: Failed to initialize the reader
at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.open(AbstractItemCountingItemStreamItemReader.java:142)
at org.springframework.batch.item.support.CompositeItemStream.open(CompositeItemStream.java:96)
at org.springframework.batch.core.step.tasklet.TaskletStep.open(TaskletStep.java:306)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:192)
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:137)
at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64)
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:152)
at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:131)
at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:135)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:301)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:134)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.IllegalStateException: Stream is already initialized. Close before re-opening.
at org.springframework.util.Assert.state(Assert.java:385)
at org.springframework.batch.item.database.AbstractCursorItemReader.doOpen(AbstractCursorItemReader.java:399)
at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.open(AbstractItemCountingItemStreamItemReader.java:139)
... 12 more
10:00:00,145 INFO SimpleJobLauncher:135 - Job: [FlowJob: [name=readyReqPoolJob]] completed with the following parameters: [{}] and the following status: [FAILED]
10:00:04,963 ERROR AbstractStep:222 - Encountered an error executing the step
org.springframework.batch.item.ReaderNotOpenException: Reader must be open before it can be read.
at org.springframework.batch.item.database.AbstractCursorItemReader.doRead(AbstractCursorItemReader.java:440)
at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.read(AbstractItemCountingItemStreamItemReader.java:83)
at org.springframework.batch.core.step.item.SimpleChunkProvider.doRead(SimpleChunkProvider.java:91)
at org.springframework.batch.core.step.item.SimpleChunkProvider.read(SimpleChunkProvider.java:155)
at org.springframework.batch.core.step.item.SimpleChunkProvider$1.doInIteration(SimpleChunkProvider.java:114)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
at org.springframework.batch.core.step.item.SimpleChunkProvider.provide(SimpleChunkProvider.java:108)
at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:69)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:395)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:131)
at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:267)
at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:77)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:253)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:195)
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:137)
at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64)
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:152)
at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:131)
at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:135)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:301)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:134)
at java.lang.Thread.run(Thread.java:744)
10:00:04,999 INFO SimpleJobLauncher:135 - Job: [FlowJob: [name=readyReqPoolJob]] completed with the following parameters: [{time=1393743561493}] and the following status: [FAILED]
答案 0 :(得分：4)
这里的问题是你的读者是单身范围的。这意味着当作业第一次运行时，ItemReader会成功打开并运行作业。但是，当作业尝试第二次运行时，它使用的是第一次执行的相同实例（已经初始化）（因此例外）。我建议将readyReqPoolReader更改为步骤范围的bean，看看是否有帮助。
您可以在此处详细了解步骤范围：http://docs.spring.io/spring-batch/trunk/apidocs/org/springframework/batch/core/scope/StepScope.html