UIContainer is not thread-safe ------------------------------ Key: GTNPORTAL-2571 URL: https://issues.jboss.org/browse/GTNPORTAL-2571 Project: GateIn Portal Issue Type: Bug Security Level: Public(Everyone can see) Reporter: Trong Tran Assignee: Trong Tran Fix For: 3.5.0.Beta01 Sometimes it raises ConcurrentModificationException in multithreading environment {code} Caused by: java.util.ConcurrentModificationException at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) at java.util.AbstractList$Itr.next(AbstractList.java:343) at org.exoplatform.webui.core.UIContainer.getChild(UIContainer.java:150) at org.exoplatform.webui.core.UIContainer.renderChild(UIContainer.java:334) {code}