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a.lang.NullPointerException: null	at java.util.HashMap.putMapEntries(HashMap.java:500)	at java.util.HashMap.putAll(HashMap.java:784)	at org.springframework.data.repository.query.ExtensionAwareEvaluationContextProvider$EvaluationContextExtensionAdapter.(ExtensionAwareEvaluationContextProvider.java:470)	at org.springframework.data.repository.query.ExtensionAwareEvaluationContextProvider.toAdapters(ExtensionAwareEvaluationContextProvider.java:210)	at org.springframework.data.repository.query.ExtensionAwareEvaluationContextProvider.access$000(ExtensionAwareEvaluationContextProvider.java:59)	at org.springframework.data.repository.query.ExtensionAwareEvaluationContextProvider$ExtensionAwarePropertyAccessor.(ExtensionAwareEvaluationContextProvider.java:235)	at org.springframework.data.repository.query.ExtensionAwareEvaluationContextProvider.getEvaluationContext(ExtensionAwareEvaluationContextProvider.java:107)	at org.springframework.data.repository.query.ExtensionAwareEvaluationContextProvider.getEvaluationContext(ExtensionAwareEvaluationContextProvider.java:59)	at org.springframework.data.jpa.repository.query.SpelExpressionStringQueryParameterBinder.getEvaluationContext(SpelExpressionStringQueryParameterBinder.java:140)	at org.springframework.data.jpa.repository.query.SpelExpressionStringQueryParameterBinder.evaluateExpression(SpelExpressionStringQueryParameterBinder.java:131)	at org.springframework.data.jpa.repository.query.SpelExpressionStringQueryParameterBinder.potentiallyBindExpressionParameters(SpelExpressionStringQueryParameterBinder.java:89)	at org.springframework.data.jpa.repository.query.SpelExpressionStringQueryParameterBinder.bind(SpelExpressionStringQueryParameterBinder.java:69)	at org.springframework.data.jpa.repository.query.ParameterBinder.bindAndPrepare(ParameterBinder.java:172)	at org.springframework.data.jpa.repository.query.ParameterBinder.bindAndPrepare(ParameterBinder.java:163)	at org.springframework.data.jpa.repository.query.AbstractStringBasedJpaQuery.doCreateQuery(AbstractStringBasedJpaQuery.java:78)	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.createQuery(AbstractJpaQuery.java:169)	at org.springframework.data.jpa.repository.query.JpaQueryExecution$CollectionExecution.doExecute(JpaQueryExecution.java:114)	at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:78)	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:100)	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:91)	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:462)	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:440)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)