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IDProjectCategoryView StatusDate SubmittedLast Update
000206710000-004: Servicespublic2012-05-31 19:322012-07-03 17:19
ReporterNathan PocockAssigned ToMatthias Damm  
PrioritynormalSeverityminorReproducibilityalways
Status closedResolutionfixed 
Fixed in Version1.02 
Summary0002067: DiscardOldest behavior is difficult to comprehend; 5.12.1.5
Description

CMPWG 5/30/2012:

The wording of the DiscardOldest parameter in the first paragraph of 5.12.1.5 is still confusing.

Our suggestion is to add a graphic representation that shows exactly how the queue behaves, by showing clearly which item is removed from the queue and which item receives the overflow bit. For example, the diagram could show a full queue and then show where the new value will go.

2 diagrams will be necessary: 1xDiscardOldest=True and 1xDiscardOldest=False.

TagsNo tags attached.
Attached Files
MonitoredItem_QueueOverflow_Diagram.xlsx (14,185 bytes)
Commit Version
Fix Due Date

Activities

Jim Luth

2012-06-05 17:09

administrator   ~0003718

Nathan, If you can provide the drawing and text to go with it in time for 1.02, we will put it in.

Nathan Pocock

2012-06-25 21:13

viewer   ~0003799

I have attached an XLS drawing that hopefully simplifies the DiscardOldest behavior. If you hide "gridlines" in Excel then an image can be retrieved easily.

The CMPWG has reviewed the diagram.

Matthias Damm

2012-07-02 11:35

developer   ~0003822

Added figure to illustrate queue overflow handling.
Needed to redraw the figure in Word.

Changed in document "OPC UA Part 4 - Services RC 1.02.18 Specification.doc"

Jim Luth

2012-07-03 17:19

administrator   ~0003830

Reviewed and agreed to changes during the call.

Issue History

Date Modified Username Field Change
2012-05-31 19:32 Nathan Pocock New Issue
2012-05-31 19:36 Nathan Pocock Description Updated
2012-06-05 17:08 Jim Luth Status new => assigned
2012-06-05 17:08 Jim Luth Assigned To => Nathan Pocock
2012-06-05 17:09 Jim Luth Note Added: 0003718
2012-06-25 21:11 Nathan Pocock File Added: MonitoredItem_QueueOverflow_Diagram.xlsx
2012-06-25 21:13 Nathan Pocock Note Added: 0003799
2012-06-25 21:13 Nathan Pocock Assigned To Nathan Pocock => Jim Luth
2012-06-25 21:16 Jim Luth Assigned To Jim Luth => Matthias Damm
2012-07-02 11:35 Matthias Damm Status assigned => resolved
2012-07-02 11:35 Matthias Damm Resolution open => fixed
2012-07-02 11:35 Matthias Damm Note Added: 0003822
2012-07-03 17:19 Jim Luth Status resolved => closed
2012-07-03 17:19 Jim Luth Note Added: 0003830
2012-07-03 17:19 Jim Luth Fixed in Version => 1.02