RE: switching to jdk1.3

[David Hay]

Title: RE: switching to jdk1.3

Just rename the "hotspot" directory in jre/bin to something else (I use "hotspot-off").  To re-enable, just rename the directory back to "hotspot".

 

At least, that's the only way I've been able to figure out how to do it

 

David Hay
Senior Software Engineer
Requisite Technology, Inc.
[EMAIL PROTECTED]
303-474-2268

"Failure has a thousand explanations. Success doesn't need one" -- Sir Alec Guiness

-----Original Message-----
From: Brian Anderson [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 04, 2000 10:54 AM
To: 'Paul Kinnucan'; Rich Johns; [EMAIL PROTECTED]
Subject: RE: switching to jdk1.3

How does one turn off hotspot?

-----Original Message-----
From: Paul Kinnucan [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 04, 2000 8:14 AM
To: Rich Johns; [EMAIL PROTECTED]
Subject: Re: switching to jdk1.3

At 03:51 PM 5/3/00 -0500, you wrote:
>nt4.0
>jde2.16beta23
>
>I'm upgrading from jdk1.2.2 to jdk1.3 and was wondering
>what changes I will need to make to my current jde setup.
>I mean is it radical? I recall that there is a different way to
>handle the jpda stuff.
>

These are the differences I recall off the top of my head.

* JDK 1.3 includes JPDA. Thus configuring JDEbug for JDK 1.3 is
  somewhat different. The procedure is documented in the beta23
  user's guide.

* JDK 1.3 includes a new version of jdb based on JPDA. The new
  version breaks the JDE's jdb interface. If you want to use the
  JDE with jdb, you have to use the old jdb, which is included, oddly
  enough, in JDK 1.3 under the name oldjdb.

* The JDK 1.3 src hierarchy has a slightly different structure.  If you
  have been including the JDK source code in the debugger source path,
  you will have to modify jde-db-source-directories to reflect the new
  structure.

* The JDK 1.3 vm is based on hot spot rather than jit technology. Sun
  acknowledges that the hotspot compiler causes problems for JPDA. I've
  noticed severe performance degredation and problems hitting breakpoints.
  The workaround until Sun fixes the problems is to turn off the hotspot
  compiler when debugging.

- Paul

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