Prashant Guleria ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiOGMzN2EzZDlm... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16577?atlOrigin=eyJpIjoiOGMzN2... ) HHH-16577 ( https://hibernate.atlassian.net/browse/HHH-16577?atlOrigin=eyJpIjoiOGMzN2... ) Index Out of Bound Exception ( https://hibernate.atlassian.net/browse/HHH-16577?atlOrigin=eyJpIjoiOGMzN2... ) Issue Type: Bug Affects Versions: 6.1.7 Assignee: Unassigned Attachments: image-20230510-070227 (6355fa57-062e-465a-961e-9ef79cc90026).png, image-20230510-070227.png Components: hibernate-core Created: 10/May/2023 00:07 AM Environment: Postgres 14 , JAVA 17, MAC OS and Linux OS, Hibenrate 6.1.17.Final with Spring Boot 3.0.4 Labels: Lazy byte-code-enhancement bytecode core enhancement lazy Priority: Major Reporter: Prashant Guleria ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) In function {{protected Object handleRead(Object target, String attributeName, Object value) }} defined in class public class EnhancementAsProxyLazinessInterceptor extends AbstractLazyLoadInterceptor , I am getting Index Out of bound exception. If you see assignment as writtenValues = new Object [writtenFieldNames.size()] ; In my case the size of writtenFieldNames is 1, But the size variable has value 23 which comes from final int size = entityPersister.getNumberOfAttributeMappings() In entityPersister my field is present at index 1, but writtenValues can contain only 1 element at index 0. and throws out of bond exception. if ( writtenFieldName.contains( entityPersister.getAttributeMapping( index ).getAttributeName() ) ) { Index 1 out of bounds for length 1 java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1 at org.hibernate.bytecode.enhance.spi.interceptor.EnhancementAsProxyLazinessInterceptor.lambda$handleRead$0(EnhancementAsProxyLazinessInterceptor.java:152) at org.hibernate.bytecode.enhance.spi.interceptor.EnhancementHelper.performWork(EnhancementHelper.java:206) at org.hibernate.bytecode.enhance.spi.interceptor.EnhancementAsProxyLazinessInterceptor.handleRead(EnhancementAsProxyLazinessInterceptor.java:102) at org.hibernate.bytecode.enhance.spi.interceptor.AbstractInterceptor.readObject(AbstractInterceptor.java:152) ( https://hibernate.atlassian.net/secure/attachment/50365/50365_image-20230... ) ( https://hibernate.atlassian.net/browse/HHH-16577#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16577#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100225- sha1:55ea0c5 )