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This bug is still present in Hibernate v5 :
java.lang.IllegalArgumentException: Parameter value element [class xxxx.Yyyyy] did not match expected type [java.lang.Integer (n/a)] at org.hibernate.jpa.spi.BaseQueryImpl.validateCollectionValuedParameterBinding(BaseQueryImpl.java:881) at org.hibernate.jpa.spi.BaseQueryImpl.validateBinding(BaseQueryImpl.java:850) at org.hibernate.jpa.internal.QueryImpl.access$000(QueryImpl.java:62) at org.hibernate.jpa.internal.QueryImpl$ParameterRegistrationImpl.bindValue(QueryImpl.java:235) at org.hibernate.jpa.spi.BaseQueryImpl.setParameter(BaseQueryImpl.java:603) at org.hibernate.jpa.spi.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:163) at org.hibernate.jpa.spi.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
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