Stacktrace for previous comment:

java.lang.IllegalStateException: Could not get property value
at org.hibernate.search.util.impl.ReflectionHelper.getMemberValue(ReflectionHelper.java:93) ~[hibernate-search-engine-4.2.0.Final.jar:4.2.0.Final]
at org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:526) ~[hibernate-search-engine-4.2.0.Final.jar:4.2.0.Final]
at org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity.getDocument(DocumentBuilderIndexedEntity.java:488) ~[hibernate-search-engine-4.2.0.Final.jar:4.2.0.Final]
at org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity.createAddWork(DocumentBuilderIndexedEntity.java:412) ~[hibernate-search-engine-4.2.0.Final.jar:4.2.0.Final]
at org.hibernate.search.batchindexing.impl.EntityConsumerLuceneWorkProducer.index(EntityConsumerLuceneWorkProducer.java:186) ~[hibernate-search-orm-4.2.0.Final.jar:4.2.0.Final]
at org.hibernate.search.batchindexing.impl.EntityConsumerLuceneWorkProducer.indexAllQueue(EntityConsumerLuceneWorkProducer.java:134) ~[hibernate-search-orm-4.2.0.Final.jar:4.2.0.Final]
at org.hibernate.search.batchindexing.impl.EntityConsumerLuceneWorkProducer.run(EntityConsumerLuceneWorkProducer.java:104) ~[hibernate-search-orm-4.2.0.Final.jar:4.2.0.Final]
at org.hibernate.search.batchindexing.impl.OptionallyWrapInJTATransaction.run(OptionallyWrapInJTATransaction.java:132) ~[hibernate-search-orm-4.2.0.Final.jar:4.2.0.Final]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) ~[na:1.7.0]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) ~[na:1.7.0]
at java.lang.Thread.run(Thread.java:722) [na:1.7.0]
Caused by: java.lang.IllegalStateException: Unable to invoke parentCategoryName
at org.hibernate.annotations.common.reflection.java.JavaXProperty.invoke(JavaXProperty.java:87) ~[hibernate-commons-annotations-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.search.util.impl.ReflectionHelper.getMemberValue(ReflectionHelper.java:90) ~[hibernate-search-engine-4.2.0.Final.jar:4.2.0.Final]
... 10 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
at sun.reflect.GeneratedMethodAccessor189.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0]
at java.lang.reflect.Method.invoke(Method.java:601) ~[na:1.7.0]
at org.hibernate.annotations.common.reflection.java.JavaXProperty.invoke(JavaXProperty.java:74) ~[hibernate-commons-annotations-4.0.1.Final.jar:4.0.1.Final]
... 11 common frames omitted
Caused by: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:164) ~[hibernate-core-4.1.9.Final.jar:4.1.9.Final]
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:285) ~[hibernate-core-4.1.9.Final.jar:4.1.9.Final]
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185) ~[hibernate-core-4.1.9.Final.jar:4.1.9.Final]
at com.company.bla.bla.EquipmentCategoryEntity_$$javassist_0.getParent(EquipmentCategoryEntity$$_javassist_0.java) ~[EquipmentCategoryEntity.class:na]
at com.company.blao.inventory.InventoryObjectEntity.getParentSid(InventoryObjectEntity.java:66) ~[InventoryObjectEntity.class:na]
at com.company.blao.module.ModuleEntity.getParentCategoryName(ModuleEntity.java:61) ~[ModuleEntity.class:na]