인프런 커뮤니티 질문&답변

안녕하세요 강의듣다가 막혔다 해결한 부분이 있어서 혹여나 동일한 문제를 겪고 있으신 분이 계실까봐 공유드립니다.

named lock파트의 native query를 작성하는 부분에서 강의 코드와 동일하게 작성하였음에도 불구하고 스프링 빈을 초기화 하는 과정에서 다음과 같은 에러를 만나게 되었습니다.

작성한 코드

  @Query("select get_lock(:key, 3000)", nativeQuery = true)
  fun getLock(key: String)

  @Query("select release_lock(:key)", nativeQuery = true)
  fun releaseLock(key: String)

발생한 에러

Caused by: org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract void com.waterfogsw.cucurrentsolutions.domain.LockRepository.getLock(java.lang.String); Reason: Cannot invoke "String.contains(java.lang.CharSequence)" because "variable" is null
	at app//org.springframework.data.repository.query.QueryCreationException.create(QueryCreationException.java:101)
	at app//org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:115)
	at app//org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.mapMethodsToQuery(QueryExecutorMethodInterceptor.java:99)
	at app//org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$new$0(QueryExecutorMethodInterceptor.java:88)
	at java.base@17.0.6/java.util.Optional.map(Optional.java:260)
	at app//org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.<init>(QueryExecutorMethodInterceptor.java:88)
	at app//org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:357)
	at app//org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:279)
	at app//org.springframework.data.util.Lazy.getNullable(Lazy.java:245)
	at app//org.springframework.data.util.Lazy.get(Lazy.java:114)
	at app//org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:285)
	at app//org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:132)
	at app//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1798)
	at app//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1748)
	... 122 more
Caused by: java.lang.NullPointerException: Cannot invoke "String.contains(java.lang.CharSequence)" because "variable" is null
	at org.springframework.data.jpa.repository.query.QueryUtils.createCountQueryFor(QueryUtils.java:620)
	at org.springframework.data.jpa.repository.query.DefaultQueryEnhancer.createCountQueryFor(DefaultQueryEnhancer.java:49)
	at org.springframework.data.jpa.repository.query.StringQuery.deriveCountQuery(StringQuery.java:111)
	at org.springframework.data.jpa.repository.query.AbstractStringBasedJpaQuery.<init>(AbstractStringBasedJpaQuery.java:82)
	at org.springframework.data.jpa.repository.query.NativeJpaQuery.<init>(NativeJpaQuery.java:58)
	at org.springframework.data.jpa.repository.query.JpaQueryFactory.fromMethodWithQueryString(JpaQueryFactory.java:53)
	at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$DeclaredQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:170)
	at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:252)
	at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:95)
	at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:111)
	... 134 more

동일한 강의를 수강중이던 지인분과 함께 비교해본 결과 스프링 부트 버전 문제임을 확인하였습니다.

지인분은 data jpa 3.0.1 버전을 사용중이셨고, 저는 data jpa 3.0.3버전을 사용하였는데 3.0.2 이상 버전에서 nativeQuery=true 사용시 NullPointerException이 발생하는 이슈가 있음을 알려드립니다.

저는 부트버전을 3.0.1로 다운그레이드하여 정상적으로 실습 진행할 수 있었습니다 :)

https://github.com/spring-projects/spring-data-jpa/issues/2812