Community
Participate
Working Groups
Build ID: I20070621-1340 Steps To Reproduce: 1.have projects which use an 1.5 JRE to compile and launchers with 1.6 JRE 2.update the 1.6 JRE to a newer version 3.after validation, a full workspace rebuild is done which is not needed because the 1.5 JRE is still the same More information: The aim to compile with JRE1.5 is for compatibility (for our clients), and the aim to launch with JRE1.6 is for performances. The update was from jdk1.6.0_01 to (very new) jdk1.6.0_02 (I have edited the JDK1.6 into my "Installed JRE" preferences instead of adding the new one, and updating all launchers.
I'm not sure to understand step 1. What JRE is on your build path at the end of this step ? The 1.5 JRE or the 1.6 JRE ?
(In reply to comment #1) > I'm not sure to understand step 1. What JRE is on your build path at the end of > this step ? The 1.5 JRE or the 1.6 JRE ? > The 1.5 JRE.
I cannot reproduce the full build. Can you please provide more detailed steps ?
(In reply to comment #3) > I cannot reproduce the full build. Can you please provide more detailed steps ? > I think the key is that "updating from jdk1.6.0_01 to jdk1.6.0_02" was done editing the existing JDK under Eclipse; which mean editing the name and the path of the jdk1.6.0_01 according to the new jdk1.6.0_02 installation. It is different of adding a new JDK "jdk1.6.0_02", removing the JDK "jdk1.6.0_01" and updating the JDK of the project. Is it what you have exactly done ?
(In reply to comment #4) > (In reply to comment #3) > > I cannot reproduce the full build. Can you please provide more detailed steps ? > > > > I think the key is that "updating from jdk1.6.0_01 to jdk1.6.0_02" was done > editing the existing JDK under Eclipse; which mean editing the name and the > path of the jdk1.6.0_01 according to the new jdk1.6.0_02 installation. > It is different of adding a new JDK "jdk1.6.0_02", removing the JDK > "jdk1.6.0_01" and updating the JDK of the project. > > Is it what you have exactly done ? > Yes, but it still doesn't do a full build. Please detail exactly what your doing (what JRE Eclipse is running on, what menus/actions you use). E.g: 1. Started Eclipse with -vm d:\jdk1.5.jre\bin\java.exe 2. File > New > Java Project 3. Entered 'My Project' ....
(In reply to comment #5) > (In reply to comment #4) > > (In reply to comment #3) > > > I cannot reproduce the full build. Can you please provide more detailed steps ? > > > > > > > I think the key is that "updating from jdk1.6.0_01 to jdk1.6.0_02" was done > > editing the existing JDK under Eclipse; which mean editing the name and the > > path of the jdk1.6.0_01 according to the new jdk1.6.0_02 installation. > > It is different of adding a new JDK "jdk1.6.0_02", removing the JDK > > "jdk1.6.0_01" and updating the JDK of the project. > > > > Is it what you have exactly done ? > > > Yes, but it still doesn't do a full build. Please detail exactly what your > doing (what JRE Eclipse is running on, what menus/actions you use). > E.g: > 1. Started Eclipse with -vm d:\jdk1.5.jre\bin\java.exe > 2. File > New > Java Project > 3. Entered 'My Project' > .... > This is all the steps: 1. launch eclipse: eclipse -data /path/to/my/workspace -vmargs -Xmx768M 2. Windows->Preferences 3. Java->Installed JRE 4. Select the "JDK1.6.0_01" 5. Edit 6. Browse 7. select "JDK1.6.0_02" root directory path then valid 8. update the name from "jdk1.6.0_01" to "jdk1.6.0_02" 9. Press OK Button Do you succeed to reproduce now ?
Nope. It still does'nt do a full build. Note that I had to make several assumptions to follow your steps: - the default JRE on your system is "1.6.0_01" - on step 1, /path/to/my/workspace points to an empty workspace (ie. no projects were ever created in this workspace, and all the settings are set to default) I'm suspecting that you have projects in your workspace, but since the steps don't say so, I don't know what they are.
(In reply to comment #7) > Nope. It still does'nt do a full build. > > Note that I had to make several assumptions to follow your steps: > - the default JRE on your system is "1.6.0_01" > - on step 1, /path/to/my/workspace points to an empty workspace (ie. no > projects were ever created in this workspace, and all the settings are set to > default) > > I'm suspecting that you have projects in your workspace, but since the steps > don't say so, I don't know what they are. > All those information are into my first report. The workspace is not empty, and justly the default JRE is 1.5 !
Attempting to make sense of all the information in this bug report, I followed these steps: 1. Unzip eclipse-java-europa-win32.zip to d:\eclipse\java-europa 2. Ensure D:\temp\195506 doesn't exist 3. Start eclipse.exe as follows: D:\eclipse\java-europa\eclipse\eclipse.exe -data D:\temp\195506 -vm d:\jdk1.5.0\jre\bin\java.exe 4. Close Welcome window 5. Window > Preferences > Java > Installed JREs 6, Add... 7. Enter "jdk1.6.0_01" as the JRE name 8, Enter "D:\jdk6_01" as the JRE home directory 9. OK 10. OK 11. File > New > Java Project 12. Enter "P" as the project name 13. Finish 14. File > New > Class 15. Enter "p" for the package 16. Enter "X" for the name 17. Check "public static void main(String[] args)" 18. Finish 19. Run > Open Run Dialog 20. Select Java Application 21. New launch configuration 22. JRE > Alternate JRE 23. Select jdk1.6,0_01 24. Run 25. Window > Preferences > Java > Installed JREs 26, Select jdk1.6.0_01 27. Edit 28. Change JRE name to "jdk1.6.0_02" 29. Change JRE home directory to "D:\jdk6_02" 30. OK 31. OK Observe: No full build Could you please follow these steps exactly, and tell me what you are doing differently ?
(In reply to comment #9) > Attempting to make sense of all the information in this bug report, I followed > these steps: I'd done almost all the same the "first time", but with some differences: > 1. Unzip eclipse-java-europa-win32.zip to d:\eclipse\java-europa Linux version. > 2. Ensure D:\temp\195506 doesn't exist > 3. Start eclipse.exe as follows: D:\eclipse\java-europa\eclipse\eclipse.exe > -data D:\temp\195506 -vm d:\jdk1.5.0\jre\bin\java.exe I didn't used the -vm argument. > 4. Close Welcome window > 5. Window > Preferences > Java > Installed JREs > 6, Add... > 7. Enter "jdk1.6.0_01" as the JRE name > 8, Enter "D:\jdk6_01" as the JRE home directory > 9. OK > 10. OK > 11. File > New > Java Project > 12. Enter "P" as the project name > 13. Finish > 14. File > New > Class > 15. Enter "p" for the package > 16. Enter "X" for the name > 17. Check "public static void main(String[] args)" > 18. Finish > 19. Run > Open Run Dialog > 20. Select Java Application > 21. New launch configuration > 22. JRE > Alternate JRE > 23. Select jdk1.6,0_01 > 24. Run > 25. Window > Preferences > Java > Installed JREs > 26, Select jdk1.6.0_01 > 27. Edit > 28. Change JRE name to "jdk1.6.0_02" > 29. Change JRE home directory to "D:\jdk6_02" > 30. OK > 31. OK > Observe: No full build > > Could you please follow these steps exactly, and tell me what you are doing > differently ? I've followed those minimalistic steps but unfortunately failed to reproduce the issue. I've tried with an important project (lots of classes, so the "full build progress bar" takes some time to fulfilled ...), and failed too. My environment is now slightly different from the original environment into which I've observed the phenomenon. It surely explains why it is not so easy to reproduce. Another (important ?) information is that I'd installed the "Eclipse IDE for Java Developers", had installed CDT and had disabled several plugins like MyLyn. Asap I can, I'll try to reproduce the issue in a nearest environment but it might be hard to find time to perform it soon. I'll do my best effort.
Thanks for your effort on this issue. I'm closing this bug as WORKSFORME for now, but don't hesitate to reopen if you have more information.
Verified for 3.4M3 using I20071029-0010 build.
