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java.lang.UnsupportedOperationException: null at java.util.AbstractCollection.add(AbstractCollection.java:221)[na:1.6.0_45] at java.util.AbstractCollection.addAll(AbstractCollection.java:305)[na:1.6.0_45] at org.apache.syncope.core.sync.impl.SyncopeSyncResultHandler.updateUser(SyncopeSyncResultHandler.java:678)[syncope.war/:na] at org.apache.syncope.core.sync.impl.SyncopeSyncResultHandler.update(SyncopeSyncResultHandler.java:769)[syncope.war/:na] at org.apache.syncope.core.sync.impl.SyncopeSyncResultHandler.doHandle(SyncopeSyncResultHandler.java:954)[syncope.war/:na] at org.apache.syncope.core.sync.impl.SyncopeSyncResultHandler.handle(SyncopeSyncResultHandler.java:275)[syncope.war/:na] at org.identityconnectors.framework.impl.api.StreamHandlerUtil$ObjectStreamHandlerAdapter.handle(StreamHandlerUtil.java:82)[connid-framework-internal-1.3.3.jar:na] at org.identityconnectors.framework.impl.api.BufferedResultsProxy.invoke(BufferedResultsProxy.java:268)[connid-framework-internal-1.3.3.jar:na] at org.identityconnectors.framework.impl.api.DelegatingTimeoutProxy.invoke(DelegatingTimeoutProxy.java:102)[connid-framework-internal-1.3.3.jar:na] at com.sun.proxy.$Proxy1729.sync(Unknown Source)[na:na] at sun.reflect.GeneratedMethodAccessor919.invoke(Unknown Source)[na:na] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)[na:1.6.0_45] at java.lang.reflect.Method.invoke(Method.java:597)[na:1.6.0_45] at org.identityconnectors.framework.impl.api.LoggingProxy.invoke(LoggingProxy.java:76)[connid-framework-internal-1.3.3.jar:na] at com.sun.proxy.$Proxy1729.sync(Unknown Source)[na:na] at org.identityconnectors.framework.impl.api.AbstractConnectorFacade.sync(AbstractConnectorFacade.java:251)[connid-framework-internal-1.3.3.jar:na] at org.apache.syncope.core.propagation.impl.ConnectorFacadeProxy.sync(ConnectorFacadeProxy.java:241)[syncope.war/:na] at org.apache.syncope.core.sync.impl.SyncJob.executeWithSecurityContext(SyncJob.java:420)[syncope.war/:na] at org.apache.syncope.core.sync.impl.SyncJob.doExecute(SyncJob.java:342)[syncope.war/:na] at org.apache.syncope.core.quartz.AbstractTaskJob.execute(AbstractTaskJob.java:126)[syncope.war/:na] at org.quartz.core.JobRunShell.run(JobRunShell.java:213)[quartz-2.1.7.jar:na] at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557)[quartz-2.1.7.jar:na]