Resolution:
Description:
============

The following causes the exception:

1).    Add JMS Queue Receiver.
2).    Add Get JMS Queue Message.
3).    Add any activity say Write File or JDBC Query.
4).    Add a Group on activity configured in step 3.

-----------------------------------
java.util.ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
    at java.util.HashMap$KeyIterator.next(HashMap.java:828)
    at com.tibco.ae.tools.palettes.processpalette.activities.EventSourceChooserFormField.loadSources(Unknown Source)
    at com.tibco.ae.tools.palettes.processpalette.group.ProcessGroupResource.createConfigViews(Unknown Source)
    at com.tibco.ae.designerapi.DesignerResource.getPropertiesViews(DesignerResource.java:978)
    at com.tibco.ae.tools.palettes.processpalette.group.ProcessGroupResource.getPropertiesViews(Unknown Source)
    at com.tibco.ae.tools.designer.newwm.WM.updatePropertyViews(WM.java:507)
    at com.tibco.ae.tools.designer.newwm.WM.inspectResource(WM.java:397)
    at com.tibco.ae.tools.designer.newwm.WM.inspectResource(WM.java:390)
    at com.tibco.ae.tools.designer.AEDocument.inspectResource(AEDocument.java:1123)
    at com.tibco.ae.tools.designer.AEDocument.inspectResource(AEDocument.java:849)
    at com.tibco.ae.tools.palettes.processpalette.ProcessDefinitionView.requestResourceProperties(Unknown Source)
    at com.tibco.ae.tools.palettes.processpalette.group.ProcessViewGroupHandler.createGroupProcess(Unknown Source)
    at com.tibco.ae.tools.palettes.processpalette.actions.GroupAction.actionPerformed(Unknown Source)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
    at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
    at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
    at java.awt.Component.processMouseEvent(Component.java:6267)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
    at java.awt.Component.processEvent(Component.java:6032)
    at java.awt.Container.processEvent(Container.java:2041)
    at java.awt.Component.dispatchEventImpl(Component.java:4630)
    at java.awt.Container.dispatchEventImpl(Container.java:2099)
    at java.awt.Component.dispatchEvent(Component.java:4460)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
    at java.awt.Container.dispatchEventImpl(Container.java:2085)
    at java.awt.Window.dispatchEventImpl(Window.java:2478)
    at java.awt.Component.dispatchEvent(Component.java:4460)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
----------------------------------------------

Environment:
===========
ALL

Symptoms:
========
When we have both the JMS queue Receiver and the Get JMS queue message activities in the same process, and while trying to group activities such as Create File, JDBC Query,JDBC Update etc., then TIBCO BW get java.util.ConcurrentModificationException will be thrown.

Cause:
=====
This is a defect. JIRA# BW-8583

Resolution:
==========
Group the activities (Create File,JDBC Query etc)  before adding Get JMS Queue Message.

References:
==========
JIRA# BW-8583