After a fresh install of AEM forms or an upgrade from LiveCycle whenever a form is opened in Workspace you see an error similar to this one in the log: 

ERROR [] (default-threads - 44) JBAS014134: EJB Invocation failed on component EjbTransactionCMTAdapter for method public abstract java.lang.Object com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterLocal.doSupports(com.adobe.idp.dsc.transaction.TransactionDefinition,com.adobe.idp.dsc.transaction.TransactionCallback) throws com.adobe.idp.dsc.DSCException: javax.ejb.EJBException: java.lang.IllegalArgumentException: JGRP000001: configuration error: the following properties in pbcast.NAKACK are not recognized: {gc_lag=10}


Export your settings end remove gc_lag by following these steps:

1. Logon to the AdminUI and navigate to Services > Workspace > Global Administration > Export global settings

2. From the resulting XML file remove the gc_lag entry

3. Import the XML file back into the system using the AdminUI