Spring Batch -BatchDatabaseInitializer：调用init方法失败

Question

我的春季批处理通过使用低配置在内存数据库hsqldb中正常工作。

@Bean
public ResourcelessTransactionManager transactionManager() {
    return new ResourcelessTransactionManager();
}

@Bean
public JobRepository jobRepository(ResourcelessTransactionManager transactionManager) throws Exception {
    MapJobRepositoryFactoryBean mapJobRepositoryFactoryBean = new MapJobRepositoryFactoryBean(transactionManager);
    mapJobRepositoryFactoryBean.setTransactionManager(transactionManager);
    return mapJobRepositoryFactoryBean.getObject();
}

@Bean
public SimpleJobLauncher jobLauncher(JobRepository jobRepository) {
    SimpleJobLauncher simpleJobLauncher = new SimpleJobLauncher();
    simpleJobLauncher.setJobRepository(jobRepository);
    return simpleJobLauncher;
}

但是当我与DB2数据库批处理连接时，它给了我下面的错误。

    class path resource [org/springframework/batch/core/schema-db2zos.sql] cannot be opened because it does not exist 
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'batchDatabaseInitializer': Invocation of init method failed; nested exception is org.springframework.jdbc.datasource.init.CannotReadScriptException: Cannot read SQL script from class path resource [org/springframework/batch/core/schema-db2zos.sql]; nested exception is java.io.FileNotFoundException: class path resource [org/springframework/batch/core/schema-db2zos.sql] cannot be opened because it does not exist 

添加属性（spring.batch.schema = classpath：/org/springframework/batch/core/schema-db2.sql）后，frenzykryger提到了以下异常。

Failed to execute SQL script statement #1 of resource class path resource [org/springframework/batch/core/schema-db2.sql]: CREATE TABLE BATCH_JOB_INSTANCE ( JOB_INSTANCE_ID BIGINT NOT NULL PRIMARY KEY , VERSION BIGINT , JOB_NAME VARCHAR(100) NOT NULL, JOB_KEY VARCHAR(32) NOT NULL, constraint JOB_INST_UN unique (JOB_NAME, JOB_KEY) ) 
com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-551, SQLSTATE=42501, SQLERRMC=AK51602;CREATE TABLE;DSNDB04, DRIVER=4.19.26
    at com.ibm.db2.jcc.am.kd.a(Unknown Source)
    at com.ibm.db2.jcc.am.kd.a(Unknown Source)
xception in thread "main" java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:675)
    at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:690)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
    at com.deere.sample.main.Application.main(Application.java:22)
Caused by: org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [SELECT JOB_INSTANCE_ID, JOB_NAME from BATCH_JOB_INSTANCE where JOB_NAME = ? order by JOB_INSTANCE_ID desc]; nested exception is com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=U90JDCPT.BATCH_JOB_INSTANCE, DRIVER=4.19.26
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:231)
Caused by: com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=U90JDCPT.BATCH_JOB_INSTANCE, DRIVER=4.19.26
    at com.ibm.db2.jcc.am.kd.a(Unknown Source)
    at com.ibm.db2.jcc.am.kd.a(Unknown Source)

添加属性（spring.batch.initializer.enabled = false）后出现以下异常。

Exception in thread "main" java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:675)
    at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:690)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
    at com.deere.sample.main.Application.main(Application.java:22)
Caused by: org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [SELECT JOB_INSTANCE_ID, JOB_NAME from BATCH_JOB_INSTANCE where JOB_NAME = ? order by JOB_INSTANCE_ID desc]; nested exception is com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=U90JDCPT.BATCH_JOB_INSTANCE, DRIVER=4.19.26
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:231)
Caused by: com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=U90JDCPT.BATCH_JOB_INSTANCE, DRIVER=4.19.26
    at com.ibm.db2.jcc.am.kd.a(Unknown Source)
    at com.ibm.db2.jcc.am.kd.a(Unknown Source)

Answer 1

spring-batch-core中没有db2zos模式，但是db2有模式。 尝试在属性中明确指定：

spring.batch.schema=classpath:/org/springframework/batch/core/schema-db2.sql

看看是否有帮助。

更新

要完全禁用模式初始化，只需使用以下属性：

spring.batch.initializer.enabled=false

有关更多参考，请参见org.springframework.boot.autoconfigure.batch.BatchProperties类。 它的字段映射到spring.batch.*属性。

在这种情况下，应该通过某种外部方法来创建架构，或者您需要使用org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean不将任何spring-batch状态保留在数据库中。