Hibernate: OutOfMemoryError persisting Blob when printing log message

Posted by paul on Stack Overflow See other posts from Stack Overflow or by paul
Published on 2009-11-17T17:31:58Z Indexed on 2010/04/17 5:03 UTC
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pretty-print

I have a Hibernate Entity:

@Entity
class Foo {
    //...
    @Lob
    public byte[] getBytes() { return bytes; }
    //....
}

My VM is configured with a maximum heap size of 512 MB. When I try to persist an object which has a 75 MB large object, I get an OutOfMemoryError.

The names of the methods in the stack trace (StringBuilder, ByteArrayBlobType.toLoggableString, pretty.Printer.toString) suggest that hibernate is trying to write a very large log message that contains my object.

Am I correct about why hibernate is using so much memory? What is the simplest way to work around this problem?

java.lang.OutOfMemoryError: Java heap space
at java.lang.AbstractStringBuilder.<init>(AbstractStringBuilder.java:44)
at java.lang.StringBuilder.<init>(StringBuilder.java:81)
at org.hibernate.type.ByteArrayBlobType.toString(ByteArrayBlobType.java:117)
at org.hibernate.type.ByteArrayBlobType.toLoggableString(ByteArrayBlobType.java:127)
at org.hibernate.pretty.Printer.toString(Printer.java:53)
at org.hibernate.pretty.Printer.toString(Printer.java:90)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:97)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.jboss.seam.persistence.HibernateSessionProxy.flush(HibernateSessionProxy.java:181)

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