Strange Patterns: 9/14/14

17 September 2014

Eclipse: HTTP Proxy Authentication Required

Eclipse Luna 4.4.0 has a bug when using Proxy to contact to Internet:
(upgrade to 4.4.1 --> Luna SR1)

i.e.:

HTTP Proxy Authentication Required: http://download.eclipse.org/modeling/tmf/xtext/updates/composite/releases/compositeContent.xml
HTTP Proxy Authentication Required: http://download.eclipse.org/modeling/tmf/xtext/updates/composite/releases/compositeContent.xml
Proxy Authentication Required

This is a known bug:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=422665
https://www.eclipse.org/forums/index.php/t/783720/

A functional workaround is:
(provided in the first URL)

Scott Lewis

2014-07-08 17:51:00 EDT

I've created an updated version of the ECF httpclient4 provider that uses Apache

Httpclient 4.1 (used in Kepler) rather than Apache Httpclient 4.2 (used in Luna

and the apparent source of this regression).

For those that are experiencing this proxy problem, this update may allow you to

 use your proxy, especially if Kepler (Apache 4.1) install/update worked for you.

 If it *does* work in some of your environments, then it would suggest that the problem

 is not with proxy configuration, but rather with Apache httpclient 4.2 deployed as part

 of Luna.  OTOH if this does not fix things for you, then it may very well be a

 configuration issue.

Disclaimer:  Installing this update, and going back to using an older version of

 httpclient4, could break other plugins.  Even if it works in your environment,

please do not use it in a production environment unless you are quite sure that

 nothing else is broken by it (e.g. Mylyn).  Also, this repo is not signed so please

 do not redistribute it.  If you are not experiencing any problem wrt this bug,

 please do not install it.

People on this bug who install and try this in their proxy environment please report

 back with what happens via a new comment on this bug.   Since I do not have an

 environment to reproduce this apparent httpclient4 version-specific problem, I must

depend upon people on this bug that do have such an environment for diagnosis.

Instructions for installation:

1) Download this zip:

http://download.eclipse.org/rt/ecf/httpclient4/org.eclipse.ecf.provider.httpclient4_3.9.0.zip

2) Unzip the contents to your local disk

3) Start Eclipse Luna.  

4) Choose Help->Install New Software->Add...

5) Name:  ECF 3.9.0 Httpclient4 Update

6) Select Local... button on right and navigate your local filesystem to where

 you unzipped the contents to in step 2

7) Navigate into the /archive/site.p2 directory and choose OK

8) There should be a single 'Uncategorized' item in the user Install dialog.

 Select this check box (and all sub-items)

9) Choose Next and step through the remaining wizard pages to finish the install

10) Restart Eclipse when prompted

Then please try to install something into Eclipse.  Whether this works for you

 or not, it would be helpful for you to report your experiences here with as

 much detail as possible.

Thanks.

15 September 2014

JDK8 in WinXP

As we all know JDK8 installer doesn't work in WinXP.
This is the best solution found at stackoverflow.com :

http://stackoverflow.com/questions/20965564/installing-jdk8-on-windows-xp-advapi32-dll-error#tab-top

This happens because Oracle dropped support for Windows XP (which doesn't have RegDeleteKeyExA used by the installer in its ADVAPI32.DLL by the way) as described in http://mail.openjdk.java.net/pipermail/openjfx-dev/2013-July/009005.html. Yet while the official support for XP has ended, the Java binaries are still (as of Java 8u20 EA b05 at least) XP-compatible - only the installer isn't...
Because of that, the solution is actually quite easy:

get 7-zip (or any other quality archiver), unpack the distribution .exe manually, it has one .zip file inside of it (tools.zip), extract it too,
use unpack200 from JDK8 to unpack all .pack files to .jar files (older unpacks won't work properly); JAVA_HOME environment variable should be set to your Java unpack root, e.g. "C:\Program Files\Java\jdk8" - you can specify it implicitly by e.g.
```
SET JAVA_HOME=C:\Program Files\Java\jdk8
```
- Unpack all files with a single command (in batch file):
```
FOR /R %%f IN (*.pack) DO "%JAVA_HOME%\bin\unpack200.exe" -r -v "%%f" "%%~pf%%~nf.jar"
```
- Unpack all files with a single command (command line from JRE root):
```
FOR /R %f IN (*.pack) DO "bin\unpack200.exe" -r -v "%f" "%~pf%~nf.jar"
```
- Unpack by manually locating the files and unpacking them one-by-one:
```
%JAVA_HOME%\bin\unpack200 -r packname.pack packname.jar
```
where packname is for example rt
point the tool you want to use (e.g. Netbeans) to the %JAVA_HOME% and you're good to go.

Note: you probably shouldn't do this just to use Java 8 in your web browser or for any similar reason (installing JRE 8 comes to mind); security flaws in early updates of major Java version releases are (mind me) legendary, and adding to that no real support for neither XP nor Java 8 on XP only makes matters much worse. Not to mention you usually don't need Java in your browser (see e.g. http://nakedsecurity.sophos.com/2013/01/15/disable-java-browsers-homeland-security/ - the topic is already covered on many pages, just Google it if you require further info). In any case, AFAIK the only thing required to apply this procedure to JRE is to change some of the paths specified above from \bin\ to \lib\ (the file placement in installer directory tree is a bit different) - yet I strongly advise against doing it.

See also: How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer?, JRE 1.7 returns: java/lang/NoClassDefFoundError: java/lang/Object

----------------

From
https://blogs.oracle.com/henrik/entry/the_future_of_java_on

Q: Can I install JDK 8 on Windows XP? Will it work?
A: The installer does not work on Windows XP. You can unpack it manually and it will likely run fine.

Project Euler #125

It is interesting how I analyzed this problem --> first attempt was doing an horrible brute force which would take milliards of years to complete.

Classical problem, where I had to re-design the solution, after getting a couple of "duplicate numbers" (also incorporated to the problem). Simple & Hard. This is the taxonomy of problems I must create.

My performance is a little slow: