Some Eclipse Foundation services are deprecated, or will be soon. Please ensure you've read this important communication.

Bug 326315

Summary: Error in ProgressStatistics.getRecentSpeed
Product: [Eclipse Project] Equinox Reporter: John Arthorne <john.arthorne>
Component: p2Assignee: John Arthorne <john.arthorne>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: P3    
Version: 3.7   
Target Milestone: 3.7 M3   
Hardware: PC   
OS: Windows XP   
Whiteboard:
Attachments:
Description Flags
Log file
none
Fix none

Description John Arthorne CLA 2010-09-27 11:04:43 EDT 
Build: 4.1 M2

I found the following error in my log when starting this build:

java.util.NoSuchElementException
	at java.util.TreeMap.firstKey(TreeMap.java:4251)
	at java.util.TreeMap$NavigableSubMap.values(TreeMap.java:3042)
	at org.eclipse.equinox.internal.p2.repository.ProgressStatistics.getRecentSpeed(ProgressStatistics.java:101)
	at org.eclipse.equinox.internal.p2.repository.ProgressStatistics.report(ProgressStatistics.java:126)
Comment 1 John Arthorne CLA 2010-09-27 11:05:16 EDT 
Created attachment 179654 [details]
Log file
Comment 2 John Arthorne CLA 2010-10-01 10:39:24 EDT 
Created attachment 180060 [details]
Fix

This looks to me like a class library bug, but there is an easy enough workaround. Here is a snippet to reduce the failure:

	TreeMap map = new TreeMap();
	SortedMap headMap = map.headMap("String");
	System.out.println(headMap.values());

This produces NoSuchElementException when running on IBM Java 6 SR 3, and I suspect on some Sun Java 6 versions as well. In newer Java 6 releases it doesn't produce a failure. In any case, a simple isEmpty() check will avoid the problem.
Comment 3 John Arthorne CLA 2010-10-01 10:40:09 EDT 
Fix released.