When you are trying to troubleshoot problems with a reconciliation task, review the Reconciliation Status Debug page ( debug/Show_Reconciler.jsp) to see what the resource threads are working on.
Some common reconciliation problems include
Reconciliation does not start.
Open the System Threads Debug page (debug/Show_Threads.jsp) to see if the Reconcilerserver_name task is running.
If the task is not running, open the System Settings page and click Trace Scheduler.
Running the Scheduler restarts the Reconciler server_name task.
Check the System Threads page again, and if the Reconciler server_name task has not restarted, the Scheduler might be hung.
Restart your application server.
Reconciliation fails for a certain user object.
If the object exists in Identity Manager, try editing the object directly. If the Identity Manager account does not exist, load the one account from the resource.
Verify the reconciliation user has the proper access rights.
Try extracting the object to a file using the same code path as reconciliation.
Open the System Memory Summary Debug page (debug/Show_Memory.jsp or debug/Show_Memory2.jsp) and verify you have enough free memory.