The stack trace is:
SEVERE: Large Objects may not be used in auto-commit mode.
WARNING: A system exception occurred during an invocation on EJB softper/ejb/edoc/ConfigBean method public byte[] eu.softper.edocgen.ejb.internal.EDocGenConfigBean.getXsltContent(int)
javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean
        at com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:4884)
        at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4719)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1941)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1892)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:198)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:84)
<APPLICATION LOGIC>
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1046)
        at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1118)
        at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5201)
        at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:610)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)
        at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:562)
        at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:157)
        at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:139)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:858)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)
        at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:367)
        at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5173)
        at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5161)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:190)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:84)
        at $Proxy194.transformDocument(Unknown Source)
<APPLICATION LOGIC>
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1046)
        at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1118)
        at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5201)
        at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:610)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)
        at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:562)
        at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:157)
        at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:139)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:858)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)
        at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:367)
        at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5173)
        at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5161)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:190)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:84)
<APPLICATION LOGIC>
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1046)
        at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1118)
        at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5201)
        at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:610)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)
        at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:562)
        at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:157)
        at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:139)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:858)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)
        at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:367)
        at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5173)
        at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5161)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:190)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:84)
<SERVELT APPLICATION LOGIC>
Caused by: org.hibernate.exception.GenericJDBCException: could not initialize lazy properties: [eu.softper.edocgen.ejb.export.XsltTransformationEntity#1]
        at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126)
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
        at org.hibernate.persister.entity.AbstractEntityPersister.initializeLazyPropertiesFromDatastore(AbstractEntityPersister.java:841)
        at org.hibernate.persister.entity.AbstractEntityPersister.initializeLazyProperty(AbstractEntityPersister.java:781)
        at org.hibernate.intercept.AbstractFieldInterceptor.intercept(AbstractFieldInterceptor.java:97)
        at org.hibernate.intercept.javassist.FieldInterceptorImpl.readObject(FieldInterceptorImpl.java:105)
<APPLICATION LOGIC>
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1046)
        at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1118)
        at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5201)
        at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:610)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)
        at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:562)
        at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:157)
        at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:139)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:858)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)
        at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:367)
        at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5173)
        at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5161)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:190)
        ... 101 more
Caused by: org.postgresql.util.PSQLException: Large Objects may not be used in auto-commit mode.
        at org.postgresql.largeobject.LargeObjectManager.open(LargeObjectManager.java:200)
        at org.postgresql.largeobject.LargeObjectManager.open(LargeObjectManager.java:172)
        at org.postgresql.jdbc2.AbstractJdbc2BlobClob.<init>(AbstractJdbc2BlobClob.java:39)
        at org.postgresql.jdbc2.AbstractJdbc2Blob.<init>(AbstractJdbc2Blob.java:22)
        at org.postgresql.jdbc3.AbstractJdbc3Blob.<init>(AbstractJdbc3Blob.java:22)
        at org.postgresql.jdbc4.AbstractJdbc4Blob.<init>(AbstractJdbc4Blob.java:20)
        at org.postgresql.jdbc4.Jdbc4Blob.<init>(Jdbc4Blob.java:20)
        at org.postgresql.jdbc4.Jdbc4ResultSet.getBlob(Jdbc4ResultSet.java:54)
        at org.postgresql.jdbc2.AbstractJdbc2ResultSet.getBlob(AbstractJdbc2ResultSet.java:323)
        at org.hibernate.type.ByteArrayBlobType.get(ByteArrayBlobType.java:87)
        at org.hibernate.type.AbstractLobType.nullSafeGet(AbstractLobType.java:46)
        at org.hibernate.persister.entity.AbstractEntityPersister.initializeLazyPropertiesFromDatastore(AbstractEntityPersister.java:817)
        ... 129 more