These test failures were spotted in the 2014-05-01 RT_Baseline nightly:

dtrace/hotspot/hotspot001
dtrace/hotspot_jni/hotspot_jni001

    These tests failed due to a bunch of "ERROR: probe 'vmops-end' is not
    available (not listed by 'dtrace -l -P')" messages. The 'vmops-end'
    part is just one example.

[2014-05-02T04:32:57.72] ERROR: probe 'vmops-end' is not available (not listed by 'dtrace -l -P')
<snip>
[2014-05-02T04:32:57.72] ERROR: probe 'class-initialization-concurrent' is not available (not listed by 'dtrace -l -P')
[2014-05-02T04:32:57.72] /export/local/aurora/sandbox/results/ResultDir/hotspot001/dtrace.err is not empty. However, it doesn't necessary indicate errors occurred.
[2014-05-02T04:32:57.72] err> dtrace: failed to match hotspot12754:::: No probe matches description