On 22/06/2011 21:27, 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?
A colleague saw it, intermittent JVM crashes. Unless he's updated I
can't say the problem has gone away.
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.
what's your HW setup? #cores/server, #servers, underlying OS?
