Gengo Import job failure

[3068800461] listeners.ExceptionPrinterJobListener Exception occured in job: GRAILS_JOBS.translate.GengoImportJob
org.quartz.JobExecutionException: could not initialize proxy - no Session [See nested exception: org.hibernate.LazyInitializationException: could not initialize proxy - no Session]
        at org.codehaus.groovy.grails.plugins.quartz.GrailsJobFactory$GrailsTaskClassJob.execute(GrailsJobFactory.java:81)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
Caused by: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
        at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:86)
        at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:140)
        at org.codehaus.groovy.grails.orm.hibernate.proxy.GroovyAwareJavassistLazyInitializer.invoke(GroovyAwareJavassistLazyInitializer.java:195)
        at translate.Version_$$_javassist_21.toString(Version_$$_javassist_21.java)
        at org.codehaus.groovy.runtime.InvokerHelper.format(InvokerHelper.java:550)
        at org.codehaus.groovy.runtime.InvokerHelper.format(InvokerHelper.java:504)
        at org.codehaus.groovy.runtime.InvokerHelper.toString(InvokerHelper.java:114)
        at org.codehaus.groovy.runtime.InvokerHelper.write(InvokerHelper.java:494)
        at groovy.lang.GString.writeTo(GString.java:189)
        at groovy.lang.GString.toString(GString.java:161)
        at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:226)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.castToType(ScriptBytecodeAdapter.java:602)
        at translate.GengoOrder.toString(GengoOrder.groovy:21)
        at org.codehaus.groovy.runtime.InvokerHelper.format(InvokerHelper.java:550)
        at org.codehaus.groovy.runtime.InvokerHelper.format(InvokerHelper.java:504)
        at org.codehaus.groovy.runtime.InvokerHelper.formatMap(InvokerHelper.java:570)
        at org.codehaus.groovy.runtime.InvokerHelper.toMapString(InvokerHelper.java:647)
        at org.codehaus.groovy.runtime.InvokerHelper.toMapString(InvokerHelper.java:636)
        at org.codehaus.groovy.runtime.InvokerHelper.toString(InvokerHelper.java:113)
        at org.codehaus.groovy.runtime.DefaultGroovyMethods.toString(DefaultGroovyMethods.java:8880)
        at org.codehaus.groovy.runtime.DefaultGroovyMethods.plus(DefaultGroovyMethods.java:8314)
        at org.codehaus.groovy.runtime.dgm$470.invoke(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:270)
        at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:52)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124)
        at translate.GengoImportJob$_execute_closure1.doCall(GengoImportJob.groovy:30)
        at sun.reflect.GeneratedMethodAccessor7810.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSite.invoke(PogoMetaMethodSite.java:225)
        at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:44)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:149)
        at translate.GengoImportJob$_execute_closure1.doCall(GengoImportJob.groovy)
        at sun.reflect.GeneratedMethodAccessor7809.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1058)
        at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1070)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:886)
        at groovy.lang.Closure.call(Closure.java:282)
        at groovy.lang.Closure.call(Closure.java:277)
        at groovy.lang.Closure$call$56.call(Unknown Source)
        at translate.imports.ImportService.acquireImportLock(ImportService.groovy:29)
        at translate.imports.ImportService$acquireImportLock.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:128)
        at translate.GengoImportJob.execute(GengoImportJob.groovy:24)
        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.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:186)
        at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:171)
        at org.codehaus.groovy.grails.plugins.quartz.GrailsJobFactory$GrailsTaskClassJob.execute(GrailsJobFactory.java:77)
        ... 2 more