jtreg (3.2.2 and up) does not work if OpenJDK is used as the JDK to run the harness. The following error is emitted:

Cannot determine version of java to run jtreg

The following code in jtreg is causing this:

# Verify java version (1.)5 or newer used to run jtreg
version=`"$JT_JAVA" -version 2>&1 |
        grep "java version" |
        sed -e 's/^[^"]*"\([^"]*\)".*/\1/' -e 's/^1\.//' -e 's/\([1-9][0-9]*\).*
/\1/'`


The pattern ("java version") is not matching because an OpenJDK java -version emits:

openjdk version "1.7.0-internal"
OpenJDK Runtime Environment (build 1.7.0-internal-mullan_06_Mar_2008_09_13-b00)
Java HotSpot(TM) Server VM (build 12.0-b01, mixed mode)