Index: JobManager.java
===================================================================
RCS file: /home/eclipse/org.eclipse.core.runtime/src/org/eclipse/core/internal/jobs/JobManager.java,v
retrieving revision 1.91
diff -u -r1.91 JobManager.java
--- JobManager.java	10 Jun 2004 19:28:45 -0000	1.91
+++ JobManager.java	24 Jun 2004 16:05:28 -0000
@@ -798,7 +798,17 @@
 		//notify listeners outside sync block
 		jobListeners.scheduled((Job) job, delay, reschedule);
 		//schedule the job
-		doSchedule(job, delay);
+		synchronized (lock) {
+			//must reassert scheduling conditions because listeners 
+			//could reschedule the same job (bug 68452)
+			if (job.getState() == Job.RUNNING) {
+				job.setStartTime(delay);
+				return;
+			}
+			if (job.getState() != Job.NONE)
+				return;
+			doSchedule(job, delay);
+		}
 		//call the pool outside sync block to avoid deadlock
 		pool.jobQueued(job);
 	}