Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Plain View
Hadoop, mail # general - Hadoop Java Versions


+
Allen Wittenauer 2011-06-15, 00:16
+
Scott Carey 2011-06-22, 20:27
Copy link to this message
-
Re: Hadoop Java Versions
Allen Wittenauer 2011-06-22, 20:49

On Jun 22, 2011, at 1:27 PM, Scott Carey wrote:

> "Problems have been reported with Hadoop, the 64-bit JVM and Compressed
> Object References (the -XX:+UseCompressedOops option), so use of that
> option is discouraged."
>
> I think the above is dated.  It also lacks critical information. What JVM
> and OS version was the problem seen?

That is definitely dated.  Those were problems from 18 and 19.

>
> CompressedOops had several issues prior to Jre 6u20, and a few minor ones
> were fixed in u21.  FWIW, I now exclusively use 64 bit w/ CompressedOops
> for all Hadoop and non-Hadoop apps and have seen no issues.  It is the
> default in 6u24 and 6u25 on a 64 bit JVM.

We use compressedoops on 21 every-so-often as well.  

Feel free to edit that whole section. :)

Thanks!
+
Scott Carey 2011-06-23, 02:42
+
Steve Loughran 2011-06-23, 12:49
+
Scott Carey 2011-06-26, 19:23
+
Steve Loughran 2011-06-27, 11:38
+
Ryan Rawson 2011-06-28, 00:10
+
Ted Dunning 2011-06-28, 00:12
+
Segel, Mike 2011-06-28, 01:54
+
Ryan Rawson 2011-06-28, 02:33
+
Segel, Mike 2011-06-28, 03:49
+
Steve Loughran 2011-06-28, 09:59
+
Michel Segel 2011-06-28, 12:27
+
Arun C Murthy 2011-06-28, 17:25
+
Evert Lammerts 2011-06-30, 21:31
+
Evert Lammerts 2011-06-30, 21:37
+
Aaron Eng 2011-06-30, 23:18
+
Ted Dunning 2011-07-01, 00:16
+
Todd Lipcon 2011-07-01, 00:24
+
Ted Dunning 2011-07-01, 01:12
+
M. C. Srivas 2011-07-01, 04:08
+
Ian Holsman 2011-07-01, 04:47
+
M. C. Srivas 2011-07-01, 05:06
+
Ted Dunning 2011-07-01, 05:09
+
Scott Carey 2011-07-01, 17:22
+
Abhishek Mehta 2011-07-01, 18:53
+
Ted Dunning 2011-07-01, 21:38
+
Ian Holsman 2011-07-03, 04:16
+
Eric Baldeschwieler 2011-07-13, 14:59
+
Ted Dunning 2011-07-13, 15:48
+
Steve Loughran 2011-07-01, 16:12
+
Ted Dunning 2011-07-01, 18:09
+
Scott Carey 2011-06-28, 02:58
+
Evert Lammerts 2011-06-30, 21:40