我正在编写一个简单的 Spring Batch 应用程序，它从文件中读取数据并将其写入 Cassandra DB。
如果我在一个简单的 java 项目中运行 Cassandra CRUD 操作，并且只有一个以下依赖项，我就能够正确运行它。我可以成功执行 CRUD 操作。
依赖：com.impetus.client kundera-cassandra 2.5
现在问题来了！
我正在将相同的代码与 Spring Batch 应用程序集成。我最终得到以下例外：
10:22:19,816 DEBUG ThreadPoolTaskExecutor-1 dao.JdbcStepExecutionDao:203 - Truncating long message before update of StepExecution, original message is: org.springframework.batch.core.JobExecutionException: Partition handler returned an unsuccessful step
at org.springframework.batch.core.partition.support.PartitionStep.doExecute(PartitionStep.java:110)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:196)
at org.springframework.batch.core.job.AbstractJob.handleStep(AbstractJob.java:375)
at org.springframework.batch.core.job.flow.FlowJob.access$100(FlowJob.java:43)
at org.springframework.batch.core.job.flow.FlowJob$JobFlowExecutor.executeStep(FlowJob.java:135)
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:103)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:266)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:118)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
; com.impetus.kundera.KunderaException: com.impetus.kundera.KunderaException: Entitymatadata should not be null
at com.impetus.kundera.persistence.EntityManagerImpl.persist(EntityManagerImpl.java:174)
at org.springframework.batch.admin.zipfeed.ZipLocationFeedWriter.write(ZipLocationFeedWriter.java:37)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
现在我进一步比较了这两个应用程序的调试。运行 Spring Batch 应用程序时，看起来下面的注释没有得到反映。仅供参考，我提供了用于执行 CRUD 操作的 bean。相同的 bean 适用于独立应用程序 (jUnit)。
请让我知道如何使它工作。看起来注释在运行批处理应用程序时没有得到反映。（仅供参考，为了便于理解，我也截取了屏幕截图）
@Entity
@Table(name = "ZipLookUp", schema = "ZipDB@cassandra_pu")
public class ZipLocationBean {
@Id
@Column(name = "ZIP_CODE")
private String zipcode;
@Column(name = "CITY")
private String city;
@Column(name = "STATE")
private String state;
@Column(name = "COUNTRY")
private String country;
@Column(name = "LATITUDE")
private double latitude;
@Column(name = "LONGITUDE")
private double longitude;
// Getters and setters;
}