ObjectDB ObjectDB
Home » Forum » @Lob @Basic(fetch = FetchType.LAZY) is loaded when it's not needed

@Lob @Basic(fetch = FetchType.LAZY) is loaded when it's not needed

#1
VladiatorVladiator
Joined on 2013-10-20

Hello. I have a class Thing that contains OneToMany list of classes Photo. Photo contains  


@Lob


@Basic(fetch = FetchType.LAZY)

private byte[] content;

And after some queries with Thing (but without loading content of the photos) I get java.lang.OutOfMemoryError: Java heap space (the server is started with -Xmx4096M). Heap dump shows that there are very much space is used by contents of the photos despite of using fetch = FetchType.LAZY. How can I fix this memory issue?

✂
edit
delete
#2
supportsupport
Joined on 2010-05-03

FetchType.LAZY is a hint that JPA implementations are allowed to ignore.

Currently ObjectDB always loads basic types eagerly.

Consider replacing byte[] with a wrapper entity (e.g. Data) that will contain the byte[] content, since lazy loading of relationships to entities can be loaded lazily.

ObjectDB Support
✂
edit
delete

Reply

To post on this website please sign in.

ObjectDB Database Getting Started Support
DBMS Features Quick Tour with JPA ObjectDB FAQ
Editions and Prices JPA Console Tutorial ObjectDB Manual
Licence Web App Tutorial Forum
Attributions Java EE JPA Tutorial Issue Tracking
Privacy Spring MVC JPA Tutorial Website Search
Terms of Use Download ObjectDB Contact Us

Which JPA is Faster?

 

See a comparison of Hibernate, EclipseLink, OpenJPA, DataNucleus, MySQL, PostgreSQL, Derby, HSQLDB, DB4O by Versant, H2 Database, SQLite and ObjectDB

in the JPA Benchmark.

Copyright © 2003, 2010, 2024  ObjectDB Software, all rights reserved. The JPA API Reference Documentation (JavaDoc) on this website is derived with some adjustments from the open source JPA 2 RI (EclipseLink) and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0. The JDO API Reference Documentation (JavaDoc) on this website is derived with some adjustments from the JDO 2.2 API and is available under the terms of the Apache License, v. 2.0. Images on this website are available under these licecnes. Documentation on this website explains how to use JPA in the context of the ObjectDB Object Database but mostly relevant also for ORM JPA implementations, such as Hibernate (and HQL), EclipseLink, TopLink, OpenJPA and DataNucleus. ObjectDB is not an ORM JPA implementation but an Object Database (ODBMS) for Java with built in JPA 2 support.