Test following tests are failing due to "foreign key constraint fail" in MySQL:

org.hibernate.test.annotations.indexcoll.IndexedCollectionTest.testDefaultMapKey
org.hibernate.test.annotations.indexcoll.IndexedCollectionTest.testMapKeyToEntity
org.hibernate.test.annotations.indexcoll.IndexedCollectionTest.testComponentSubPropertyMapKey
org.hibernate.test.annotations.indexcoll.IndexedCollectionTest.testMapKeyEntityEntity

Sample stack trace of the failure:
org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:254)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:237)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at org.hibernate.test.annotations.indexcoll.IndexedCollectionTest.testDefaultMapKey(Unknown Source)
at org.hibernate.test.annotations.TestCase.runTest(Unknown Source)
Caused by: java.sql.BatchUpdateException: Cannot add or update a child row: a foreign key constraint fails (`platformae/addressentry`, CONSTRAINT `FK181B28FE1355AC4A` FOREIGN KEY (`firstname`, `lastname`) REFERENCES `addressentry` (`firstname`, `lastname`))
at com.mysql.jdbc.ServerPreparedStatement.executeBatch(ServerPreparedStatement.java:665)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:247)

http://opensource.atlassian.com/projects/hibernate/browse/HHH-4695