javax.servlet.ServletException: Filter execution threw an exception
	org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:149)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
root cause

java.lang.OutOfMemoryError: Java heap space
	java.util.jar.Attributes.read(Attributes.java:394)
	java.util.jar.Manifest.read(Manifest.java:199)
	java.util.jar.Manifest.<init>(Manifest.java:69)
	java.util.jar.JarFile.getManifestFromReference(JarFile.java:178)
	java.util.jar.JarFile.getManifest(JarFile.java:164)
	org.apache.catalina.loader.WebappClassLoader.findResourceInternal(WebappClassLoader.java:2979)
	org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2753)
	org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1159)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1647)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
	org.hibernate.type.descriptor.sql.DateTypeDescriptor.getBinder(DateTypeDescriptor.java:55)
	org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:280)
	org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:275)
	org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet(AbstractSingleColumnStandardBasicType.java:57)
	org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2777)
	org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2752)
	org.hibernate.persister.entity.AbstractEntityPersister$4.bindValues(AbstractEntityPersister.java:2959)
	org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57)
	org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2966)
	org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3477)
	org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81)
	org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362)
	org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:203)
	org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:183)
	org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:167)
	org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:321)
	org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:286)
	org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:192)
	org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:125)
	org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:204)
	org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
	org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:189)