Production error: when processing request: [POST] /admin/execute

[1123081206] errors.GrailsExceptionResolver Exception occurred when processing request: [POST] /admin/execute
Stacktrace follows:
java.util.ConcurrentModificationException
        at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
        at java.util.AbstractList$Itr.next(AbstractList.java:343)
        at grails.converters.JSON.value(JSON.java:198)
        at grails.converters.JSON.convertAnother(JSON.java:161)
        at grails.converters.JSON.value(JSON.java:198)
        at grails.converters.JSON.convertAnother(JSON.java:161)
        at grails.converters.JSON.value(JSON.java:198)
        at grails.converters.JSON.render(JSON.java:133)
        at grails.converters.JSON.render(JSON.java:149)
        at translate.AdminController$_closure17.doCall(AdminController.groovy:181)
        at translate.AdminController$_closure17.doCall(AdminController.groovy)
        at com.studentsonly.grails.plugins.uiperformance.CacheFilter.doFilter(CacheFilter.java:67)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)

[1123457502] translate.MavenDeployerService org.hibernate.LazyInitializationException: could not initialize proxy - no Session

org.hibernate.LazyInitializationException: could not initialize proxy - no Session
        at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:86)
        at org.codehaus.groovy.grails.orm.hibernate.proxy.HibernateProxyHandler.unwrapProxy(HibernateProxyHandler.java:83)
        at org.codehaus.groovy.grails.orm.hibernate.cfg.GrailsHibernateUtil.unwrapProxy(GrailsHibernateUtil.java:404)
        at org.codehaus.groovy.grails.orm.hibernate.cfg.GrailsHibernateUtil$unwrapProxy.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)
        at org.codehaus.groovy.grails.orm.hibernate.cfg.GrailsHibernateUtil$unwrapProxy.call(Unknown Source)
        at org.codehaus.groovy.grails.plugins.orm.hibernate.HibernatePluginSupport$__clinit__closure94.doCall(HibernatePluginSupport.groovy:397)
        at sun.reflect.GeneratedMethodAccessor272.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:266)
        at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:149)
        at org.codehaus.groovy.grails.plugins.orm.hibernate.HibernatePluginSupport$__clinit__closure94.call(HibernatePluginSupport.groovy)
        at sun.reflect.GeneratedMethodAccessor271.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.MetaClassImpl.invokeMethod(MetaClassImpl.java:930)
        at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1070)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:886)
        at org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:793)
        at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:776)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaMethod$1.invoke(ClosureMetaMethod.java:137)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
        at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:1602)
        at groovy.lang.ExpandoMetaClass.getProperty(ExpandoMetaClass.java:1099)
        at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:3311)
        at groovy.lang.ExpandoMetaClass.getProperty(ExpandoMetaClass.java:1111)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassGetPropertySite.getProperty(PogoMetaClassGetPropertySite.java:48)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:239)
        at translate.MavenDeployerService.getArtifactId(MavenDeployerService.groovy:193)
        at translate.MavenDeployerService.this$2$getArtifactId(MavenDeployerService.groovy)
        at translate.MavenDeployerService$this$2$getArtifactId.callCurrent(Unknown Source)
        at translate.MavenDeployerService.deploy(MavenDeployerService.groovy:117)
        at translate.MavenDeployerService$deploy.call(Unknown Source)
        at translate.GengoTranslateService.importMessagesAndDeployToMaven(GengoTranslateService.groovy:63)
        at translate.GengoTranslateService$$FastClassByCGLIB$$6a59911f.invoke(<generated>)
        at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
        at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:688)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:621)
        at translate.GengoTranslateService$$EnhancerByCGLIB$$45861fac.importMessagesAndDeployToMaven(<generated>)
        at translate.GengoTranslateService$importMessagesAndDeployToMaven.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124)
        at translate.GengoImportJob$_execute_closure1.doCall(GengoImportJob.groovy:27)
        at sun.reflect.GeneratedMethodAccessor2704.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.GeneratedMethodAccessor2703.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$call.call(Unknown Source)
        at translate.imports.ImportService.acquireImportLock(ImportService.groovy:26)
        at translate.imports.ImportService$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:23)
        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$GrailsTaskClassJob.execute(GrailsJobFactory.java:77)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)