NewRelic error with spring boot

 Recently we added two datasources to our application and our application worked fine without newRelic. But as soon as we added newRelic to our application it failed with a strange error:

2024-11-08 20:22:37 java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
2024-11-08 20:22:37     at org.jboss.jandex.Indexer.updateTypeTarget(Indexer.java:903)
2024-11-08 20:22:37     at org.jboss.jandex.Indexer.updateTypeTargets(Indexer.java:630)
2024-11-08 20:22:37     at org.jboss.jandex.Indexer.index(Indexer.java:1698)
2024-11-08 20:22:37     at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.toClassDescriptor(ClassFileArchiveEntryHandler.java:64)
2024-11-08 20:22:37     at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.handleEntry(ClassFileArchiveEntryHandler.java:52)
2024-11-08 20:22:37     at org.hibernate.boot.archive.internal.JarFileBasedArchiveDescriptor.visitArchive(JarFileBasedArchiveDescriptor.java:147)
2024-11-08 20:22:37     at org.hibernate.boot.archive.scan.spi.AbstractScannerImpl.scan(AbstractScannerImpl.java:48)
2024-11-08 20:22:37     at org.hibernate.boot.model.process.internal.ScanningCoordinator.coordinateScan(ScanningCoordinator.java:76)
2024-11-08 20:22:37     at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.prepare(MetadataBuildingProcess.java:107)
2024-11-08 20:22:37     at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:269)
2024-11-08 20:22:37     at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:182)
2024-11-08 20:22:37     at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:52)
2024-11-08 20:22:37     at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365)
2024-11-08 20:22:37     at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409)
2024-11-08 20:22:37     at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396)
2024-11-08 20:22:37     at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341)
2024-11-08 20:22:37     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863)
2024-11-08 20:22:37     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800)

After struggling for a lot of time we figured out that one of the datasource was not having any entity defined. After defining a dummy entity for the datasource the error was gone away and the application started working with newRelic also.

Please do comment if you find it useful.