This is the first milestone of Spring Batch 6.0, which is a major release that comes with several new features, enhancements, and bug fixes. Moreover, this release introduces a number of API breaking changes and deprecations. Please refer to the migration guide for the full list of changes.

⭐ New features

• Introduce a modern command line batch operator #4899
• Add ability to use bean names for jobs and steps #4858
• Make MapJobRegistry smart enough to auto register jobs defined in the application context #4855
• Make MessageChannelPartitionHandler usable with any job repository implementations #4917
• Add optimistic locking for meta-data deletion #4793

🚀 Enhancements

• Improve experience when configuring an alternative JobRepository #4718
• Improve performance of JdbcStepExecutionDao::getStepExecution #4799
• Improve update sql for optimistic locking #4792
• Improve JobOperator API by using domain types instead of primitive types #4845
• Improve JobOperator by reducing its scope to job operations only #4833
• Core API simplification #4847
• Move core APIs in dedicated packages #4877
• Move listener APIs under core.listener package #4867
• Move core.explore package under core.repository #4827
• Move core partitioning APIs under org.springframework.batch.core.partition #4849
• Move DAOs implementations to separate packages #4848
• Remove unnecessary generic from JobKeyGenerator interface #4886
• Remove usage of JobFactory in `JobRegistry`` #4854
• Remove dependency to JobExplorer in SimpleJobOperator #4817
• Remove JobExplorer bean registration from the default batch configuration #4825
• Remove unnecessary reflection in RemoteChunkHandlerFactoryBean #4839
• Rename SimpleJobOperator to TaskExecutorJobOperator #4834
• Rename JobRepositoryFactoryBean to JdbcJobRepositoryFactoryBean #4829
• FlatFileItemReaderBuilder : raise check exception on build #4757
• Make JobOperator extend JobLauncher #4832
• Make JobRepository extend JobExplorer #4824
• Redundant methods in JobExplorer/JobInstanceDao APIs #4821
• Introduce ErrorProne, fix compiler warnings #4807
• Add Redis integration tests #4892
• Fail test if no exception is thrown in testErrorMessageWhenNoLineTokenizerWasProvided #4883
• Refactor AOT proxy hints for better type safety #4881
• Refactor ExitStatus#isRunning for type-safety #4783
• Mark argument to ExitStatus#equals as nullable #4823
• Use typesafe variant of ctx::getBean instead #4803
• Use jdbcTemplate.queryForStream().findFirst() where appropriate #4802
• Reuse existing SQL where feasible #4801

🐞 Bug fixes

• Incorrect warning when starting a job with an empty parameters set #4914
• Incorrect handling of job parameters when using a JobParametersIncrementer #4910
• Write Skip Count Not Updated in Chunk Processing #4514

📔 Documentation

• Polish code block style and fix typo in whatsnew.adoc #4901
• Fix javadoc in JdbcCursorItemReaderBuilder #4838
• Correct comment in RemoteChunkingJobFunctionalTests #4822

🔨 Tasks

• Replace usage of JobExplorer with JobRepository in RemoteStepExecutionAggregator #4928
• Replace usage of JobExplorer with JobRepository in SystemCommandTasklet #4927
• Replace usage of JobLauncher with JobOperator in JobLaunchingGateway and JobLaunchingMessageHandler #4924
• Replace usage of JobLauncher with JobOperator in JobStep #4923
• Replace usage of JobExplorer with JobRepository in StepExecutionRequestHandler #4918
• Rename JobLauncherTestUtils to JobOperatorTestUtils #4920
• Rename JobExplorerFactoryBean to JdbcJobExplorerFactoryBean #4846
• Deprecate StepRunner #4921
• Deprecate modular job configuration through EnableBatchProcessing #4866
• Remove usage of JobExplorer in BatchIntegrationConfiguration #4919
• Remove deprecated APIs scheduled for removal in v6 #4819
• Update GraalVM runtime hints #4844

🆙 Dependency Upgrades

• Spring Framework: 7.0.0-M7
• Spring Integration: 7.0.0-M1
• Spring AMQP: 4.0.0-M3
• Spring Kafka: 4.0.0-M3
• Spring Data: 4.0.0-M4
• Spring Ldap: 4.0.0-M1
• Spring Retry: 2.0.12
• Micrometer: 1.16.0-M1

❤️ Contributors

Thank you to all the contributors who worked on this release:

@darth-raijin, @itis821, @jbotuck, @martinfrancois, @noojung, @patrickwinti, @quaff, @scordio, @sieunie, @sjiwon, and @therepanic

Full change log: v5.2.2...v6.0.0-M1

🐞 Bug fixes

• SynchronizeStatus in MongoJobExecutionDao is not upgrading the status of the JobExecution #4760
• @SpringBatchTest with JUnit @Nested triggers new test context creation #4738
• ExecutionContext dirty flag does not remain true when null is put for a non-existent key #4692
• ExecutionContext dirty flag is reset by a new put #4685
• MultiResourceItemWriter creates files with varying line count #1722
• Fix index creation statements in MongoDB DDL script #4758
• Attempt to close all delegate readers even when some fail #4764
• Attempt to close all delegate writers even when some fail #4750

🚀 Enhancements

• Add AOT runtime hints for infrastructure artifacts #4785
• Add AOT runtime hints for core listeners #4769
• Use Files.delete() for better error reporting #4775
• Fix variable usage in ScriptItemProcessorTests and include script engine test dependencies #4678
• Add @FunctionalInterface to ChunkProcessor #4773

📔 Documentation

• Update usage of deprecated StepExecutionListenerSupport in documention #4784
• Fix typo in Javadocs of FlatFileItemWriterBuilder#name(String) #4781
• Fix incorrect Javadocs in remote partitioning setup builders #4778
• Fix wrong statement in Javadoc of SimplePartitioner #4772
• Fix typo in intercepting-execution.adoc #4766
• Remove outdated AssertFile usage in section "Validating Output Files" of the reference documentation #4754

🆙 Dependency Upgrades

• Spring Framework: 6.2.4
• Spring Retry: 2.0.11
• Micrometer: 1.14.5
• Spring Integration: 6.4.3
• Spring AMQP: 3.2.4
• Spring Kafka: 3.3.4
• Spring Data: 3.4.4
• Spring Ldap: 3.2.11

❤️ Contributors

Thank you to all the contributors who contributed to this release:

@charlie881007, @GGHDMS, @neoludo, @elimelec, @hpoettker, @pongdangx2, @quaff, @scordio, @yeonnex, and @yoseplee

Full change log: v5.2.1...v5.2.2

Heads-up: ❗This is the last OSS release of the 5.1.x line ❗Please check the support page.

⭐ New features

• Add DatabaseType POSTGRES for the product name EnterpriseDB #4627

🚀 Enhancements

• Bad performance of GET_LAST_STEP_EXECUTION query on DB2 with large STEP_EXECUTION table #4657
• Missing @FunctionalInterface in JobKeyGenerator #4613

🐞 Bug fixes

• Different behavior when interrupting a job, depending on the parallel flow order #3939
• MongoPagingItemReader never reset page number #1086
• Job restart after stop fails #1287
• Wrong column types in JdbcStepExecutionDao #4648

📔 Documentation

• Grammatical error in restart.adoc #4600
• Typo in architecture doc #4607
• Typo in the documentation chapter Spring Batch Integration #4649
• Missing documentation about MultiResourceItemWriter not creating empty files when no data goes through delegates #4645
• Missing note about not scoping Step beans with Job scope #3900
• Unclear documentation about wildcard usage to select input files #4707
• Regression in Javadoc deployment path with 5.1.2 #4604

🆙 Dependency Upgrades

• Spring Framework: 6.1.16
• Spring Retry: 2.0.11
• Micrometer: 1.12.12
• Spring Integration: 6.2.11
• Spring AMQP: 3.1.8
• Spring Kafka: 3.1.10
• Spring Data: 3.2.12
• Spring Ldap: 3.2.9

❤️ Contributors

Thank you to all the contributors who worked on this release!

🐞 Bug fixes

• JobExecution#getJobExecution(@Nullable Long executionId) returns null when using MongoDB as JobExplorer #4722
• Different behavior when interrupting a job, depending on the parallel flow order #3939
• MongoPagingItemReader never reset page number #1086
• DerbyPagingQueryProvider remaining pages query is not correct #1253
• Job restart after stop fails #1287

🚀 Enhancements

• Update DerbyPagingQueryProvider for Derby 10.7 and above #1673

📔 Documentation

• Missing note about not scoping Step beans with Job scope #3900
• Repeating 'the the' exists #4615
• Unclear documentation about wildcard usage to select input files #4707
• Incorrect class name and grammatical error in docs whats-new #4720
• Fix link section #4696
• Error in Migration guide #4695
• Incorrect link and closing tag for listeners in documentation #4610

🆙 Dependency Upgrades

• Spring Framework: 6.2.1
• Spring Retry: 2.0.11
• Micrometer: 1.14.2
• Spring Integration: 6.4.1
• Spring AMQP: 3.2.1
• Spring Kafka: 3.3.1
• Spring Data: 3.4.1
• Spring Ldap: 3.2.9

🔨 Tasks

• Deprecate SqlWindowingPagingQueryProvider #4733

❤️ Contributors

Thank you to all the contributors who worked on this release:

@Seungpang, @Solodye, @ngocnhan-tran1996, @uli-f, and @xeounxzxu

⭐ New features

• Add support for MongoDB as JobRepository #877
• Introduce a resourceless job repository implementation #4679
• Add adapters for Java functional interfaces #4672
• Add ability to customize the job parameters converter in the default batch configuration #4650
• Add CompositeItemReader analogous to CompositeItemWriter and CompositeItemProcessor #757
• Allow dependent steps to start concurrently #2044
• Add blocking queue item reader/writer to enable implementing the staged event-driven architecture in batch jobs #2350
• Add support for data classes in JdbcCursorItemReaderBuilder & JdbcPagingItemReaderBuilder #4578
• Add support for query hints in JPA item readers #4479
• Add possibility to configure line separator in RecursiveCollectionLineAggregator #4594
• Add JobRegistrySmartInitializingSingleton #4521
• Add DatabaseType POSTGRES for the product name EnterpriseDB #4627
• Revisit the mechanism of job registration #4547

🐞 Bug fixes

• Incorrect bean configuration in DefaultBatchConfiguration #4543
• BeanPostProcessorChecker.postProcessAfterInitialization WARNING after upgrade spring-framework-6.1.0 #4489
• Possible duplicate state transitions in flow definition #3674
• Order of Transition Elements Still Does Not completely adhere to documentation #3996
• Memory leak in MessageChannelPartitionHandler when polling the database #4598
• ListItemWriter<T>::getWrittenItems has bad wildcard return type #4576
• SimpleBinaryBufferedReaderFactory misses line endings #811
• StepExecution.getEndTime() returns null in StepExecutionListener.afterStep() #3846
• Default value for ignoreWarnings in JdbcCursorItemReaderBuilder does not align with documentation #4570
• Remote partitioning doesn't work if you're using graalvm #4564
• SystemCommandTasklet does not propagate errors #4483
• Incorrect Chunk property value in implementation of ItemWriter write method #4560
• Incorrect step configuration when setting the taskExecutor before faultTolerant() #4438
• Incorrect deprecation in MongoPagingItemReader #4552
• JobRepository.deleteJobInstance() Fails with Foreign Key Constraint Violation if Job Executions have Step Executions #4382
• DefaultJobParametersConverter throws java.lang.ArrayIndexOutOfBoundsException if input is empty string #4505
• Wrong column types in JdbcStepExecutionDao #4648
• MongoStepExecutionDao returns an different stepExecution if a job has multiple steps spring-projects-experimental/spring-batch-experimental/issues/3

🚀 Enhancements

• Bad performance of GET_LAST_STEP_EXECUTION query on DB2 with large STEP_EXECUTION table #4657
• Use Threadlocal.remove() instead of Threadlocal.set(null) #4601
• Performance issue in DefaultFieldSet due to the usage of SimpleDateFormat #1694
• Improve Error Messages in JobParametersBuilder methods #4581
• Implement jumpToItem in JsonItemReader #4557
• Maintain similar ordering of elements between DefaultStateTransitionComparator and FlowJobBuilder #4527
• Avoid collection copying #4553
• Make util classes to follow code style guide #4545
• Use annotation @Override consistently #4512
• Check dirty flag of step execution context before update in inner loop #4503
• Missing @FunctionalInterface in JobKeyGenerator #4613
• Proper default value for skipLimit #4661

📔 Documentation

• Flow order priority does not match documented behavior #4456
• Incorrect link to batch reference documentation on project page #4637
• Typo in architecture doc #4607
• Grammatical error in restart.adoc #4600
• Incorrect link in appendix #4595
• Missing information about error handling in ChunkListeners #4384
• Improve Javadoc regarding the sort order in RepositoryItemReader #4462
• Fix code sample that uses deprecated StepBuilderFactory #4582
• Misleading documentation on ItemWriteListener #4400
• Incorrect code example in documentation #4550
• Reference Documentation Uses Deprecated Class StepExecutionListenerSupport #4538
• Incorrect Type of getter in Documentation for JobParameters#getDouble #4526
• UI Aligment Issue - Spring Batch Version Number in Docs #4534
• Missing documentation about MultiResourceItemWriter not creating empty files when no data goes through delegates #4645
• Typo in the documentation chapter Spring Batch Integration #4649

🆙 Dependency Upgrades

• Spring Framework: 6.2.0
• Spring Retry: 2.0.10
• Micrometer: 1.14.1
• Spring Integration: 6.4.0
• Spring AMQP: 3.2.0
• Spring Kafka: 3.3.0
• Spring Data: 3.4.0
• Spring Ldap: 3.2.8

🔨 Tasks

• Deprecate the usage of LobHandler #4588
• Deprecate SystemPropertyInitializer #4680
• Remove deprecated APIs scheduled for removal in v5.2.0 #4398
• Regression in javadocs deployment script #4511

❤️ Contributors

Many thanks to all contributors who worked on this release!

Full change log: v5.1.2...v5.2.0

⭐ New features

• Allow Subclasses in the CompositeItemReader #4682

🐞 Bug fixes

• Wrong column types in JdbcStepExecutionDao #4648
• MongoStepExecutionDao returns an different stepExecution if a job has multiple steps spring-projects-experimental/spring-batch-experimental/issues/3

🚀 Enhancements

• Missing @FunctionalInterface in JobKeyGenerator #4613

📔 Documentation

• Missing documentation about MultiResourceItemWriter not creating empty files when no data goes through delegates #4645
• Typo in the documentation chapter Spring Batch Integration #4649

🆙 Dependency Upgrades

• Spring Framework: 6.2.0-RC2
• Spring Retry: 2.0.10
• Micrometer: 1.14.0-RC1
• Spring Integration: 6.4.0-RC1
• Spring AMQP: 3.2.0-RC1
• Spring Kafka: 3.3.0-RC1
• Spring Data: 3.4.0-RC1
• Spring Ldap: 3.2.7

❤️ Contributors

Many thanks to all contributors who worked on this release!

Full change log: v5.2.0-M2...v5.2.0-RC1

⭐ New features

• Add support for MongoDB as JobRepository #877

• Introduce a resourceless job repository implementation #4679

• Add adapters for Java functional interfaces #4672

• Add ability to customize the job parameters converter in the default batch configuration #4650

• Add DatabaseType POSTGRES for the product name EnterpriseDB #4627

• Simple CompositeItemReader analogous to CompositeItemWriter and CompositeItemProcessor #757

• Allow dependent steps to start concurrently #2044

• Add blocking queue item reader/writer to enable implementing the staged event-driven architecture in batch jobs #2350

🚀 Enhancements

• Bad performance of GET_LAST_STEP_EXECUTION query on DB2 with large STEP_EXECUTION table #4657

🔨 Tasks

• Deprecate the usage of LobHandler #4588
• Deprecate SystemPropertyInitializer #4680

❤️ Contributors

Thank you to all the contributors who worked on this release!

Full change log: v5.2.0-M1...v5.2.0-M2

⭐ New features

• Add support for data classes in JdbcCursorItemReaderBuilder & JdbcPagingItemReaderBuilder #4578
• Add support for query hints in JPA item readers #4479
• Add possibility to configure line separator in RecursiveCollectionLineAggregator #4594
• Revisit the mechanism of job registration #4547
• Add JobRegistrySmartInitializingSingleton #4521

🐞 Bug fixes

• Incorrect bean configuration in DefaultBatchConfiguration #4543
• BeanPostProcessorChecker.postProcessAfterInitialization WARNING after upgrade spring-framework-6.1.0 #4489
• Possible duplicate state transitions in flow definition #3674
• Order of Transition Elements Still Does Not completely adhere to documentation #3996
• Memory leak in MessageChannelPartitionHandler when polling the database #4598
• ListItemWriter<T>::getWrittenItems has bad wildcard return type #4576
• SimpleBinaryBufferedReaderFactory misses line endings #811
• StepExecution.getEndTime() returns null in StepExecutionListener.afterStep() #3846
• Default value for ignoreWarnings in JdbcCursorItemReaderBuilder does not align with documentation #4570
• Remote partitioning doesn't work if you're using graalvm #4564
• SystemCommandTasklet does not propagate errors #4483
• Incorrect Chunk property value in implementation of ItemWriter write method #4560
• Incorrect step configuration when setting the taskExecutor before faultTolerant() #4438
• Incorrect deprecation in MongoPagingItemReader #4552
• JobRepository.deleteJobInstance() Fails with Foreign Key Constraint Violation if Job Executions have Step Executions #4382
• DefaultJobParametersConverter throws java.lang.ArrayIndexOutOfBoundsException if input is empty string #4505

🚀 Enhancements

• Use Threadlocal.remove() instead of Threadlocal.set(null) #4601
• Performance issue in DefaultFieldSet due to the usage of SimpleDateFormat #1694
• Improve Error Messages in JobParametersBuilder methods #4581
• Implement jumpToItem in JsonItemReader #4557
• Maintain similar ordering of elements between DefaultStateTransitionComparator and FlowJobBuilder #4527
• Avoid collection copying #4553
• Make util classes to follow code style guide #4545
• Use annotation @Override consistently #4512
• Check dirty flag of step execution context before update in inner loop #4503

📔 Documentation

• Flow order priority does not match documented behavior #4456
• Incorrect link to batch reference documentation on project page #4637
• Typo in architecture doc #4607
• Grammatical error in restart.adoc #4600
• Incorrect link in appendix #4595
• Missing information about error handling in ChunkListeners #4384
• Improve Javadoc regarding the sort order in RepositoryItemReader #4462
• Fix code sample that uses deprecated StepBuilderFactory #4582
• Misleading documentation on ItemWriteListener #4400
• Incorrect code example in documentation #4550
• Reference Documentation Uses Deprecated Class StepExecutionListenerSupport #4538
• Incorrect Type of getter in Documentation for JobParameters#getDouble #4526
• UI Aligment Issue - Spring Batch Version Number in Docs #4534

🆙 Dependency Upgrades

• Spring Framework: 6.2.0-RC1
• Spring Retry: 2.0.9
• Micrometer: 1.14.0-M3
• Spring Integration: 6.4.0-M3
• Spring AMQP: 3.2.0-M3
• Spring Kafka: 3.3.0-M3
• Spring Data: 3.4.0-M1
• Spring Ldap: 3.2.6

🔨 Tasks

• Remove deprecated APIs scheduled for removal in v5.2.0 #4398
• Regression in javadocs deployment script #4511

❤️ Contributors

Many thanks to all contributors who worked on this release!

Full change log: v5.1.2...v5.2.0-M1

🐞 Bug fixes

• Incorrect Chunk property value in implementation of ItemWriter write method #4560
• SystemCommandTasklet does not propagate errors #4483
• Remote partitioning doesn't work if you're using graalvm #4564
• SimpleBinaryBufferedReaderFactory misses line endings #811
• Memory leak in MessageChannelPartitionHandler when polling the database #4598

🚀 Enhancements

• Improve Error Messages in JobParametersBuilder methods #4581

📔 Documentation

• Reference Documentation Uses Deprecated Class StepExecutionListenerSupport #4538
• Incorrect code example in documentation #4550
• Misleading documentation on ItemWriteListener #4400
• Code sample uses deprecated StepBuilderFactory #4582
• Typo in java-config.adoc #4591
• Incorrect link in appendix #4595

🆙 Dependency Upgrades

• Spring Framework: 6.1.7
• Spring Retry: 2.0.6
• Micrometer: 1.12.6
• Spring Integration: 6.2.5
• Spring AMQP: 3.1.5
• Spring Kafka: 3.1.5
• Spring Data: 3.2.6
• Spring Ldap: 3.2.3

❤️ Contributors

Thank you to all the contributors who worked on this release!

Full change log: v5.1.1...v5.1.2

🐞 Bug fixes

• Incorrect Chunk property value in implementation of ItemWriter write method #4560
• SystemCommandTasklet does not propagate errors #4483
• Remote partitioning doesn't work if you're using graalvm #4564
• SimpleBinaryBufferedReaderFactory misses line endings #811
• Memory leak in MessageChannelPartitionHandler when polling the database #4598

🚀 Enhancements

• Improve Error Messages in JobParametersBuilder methods #4581

📔 Documentation

• Reference Documentation Uses Deprecated Class StepExecutionListenerSupport #4538
• Incorrect code example in documentation #4550
• Misleading documentation on ItemWriteListener #4400
• Code sample uses deprecated StepBuilderFactory #4582
• Typo in java-config.adoc #4591

🆙 Dependency Upgrades

• Spring Framework: 6.0.20
• Spring Retry: 2.0.6
• Spring AMQP: 3.0.14
• Spring Kafka: 3.0.17

❤️ Contributors

Thank you to all the contributors who worked on this release!

Full change log: v5.0.5...v5.0.6