Spring + Hibernate Search 3.1.0 = ArrayStoreException

Posted by Double Compile. Tuesday, January 19. 2010, 11:30 AM in Java

I'm using Spring Framework version 3.0.0 (although, I'll bet the same problem would happen with 2.x). I'm using Hibernate Search 3.1.0 (That's what's in Maven. I wonder why there's no 3.1.1).

Trying to use the configuration as follows inside of a Spring configuration document.

<property name="eventListeners">
<map>
<entry key="post-update" value-ref="fullTextEventListener" />
<entry key="post-delete" value-ref="fullTextEventListener" />
<entry key="post-insert" value-ref="fullTextEventListener" />
<entry key="flush">
<list>
<bean class="org.hibernate.event.def.DefaultFlushEventListener" />
<ref local="fullTextEventListener" />
</list>
</entry>
</map>
</property>

Upon running some unit tests, I get a nasty Exception stack, with the following at the root.

Caused by: java.lang.ArrayStoreException
	at java.lang.System.arraycopy(Native Method)
	at java.util.ArrayList.toArray(ArrayList.java:306)
	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:759)
	at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1460)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1398)
	... 57 more

The root cause of the problem (and I needed to debug the Spring/Hibernate internals to figure this out) is that FullTextIndexEventListener does not implement the FlushEventListener interface in version 3.1.0, but it does in 3.1.1.

Solution: upgrade (if you're using Maven, try the JBoss repository which has the latest stuff) or omit the "flush" event from the configuration.

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