/usr/share/doc/openjdk-6-jre-headless/test-amd64/jtreg-summary-zero.log is in openjdk-6-jdk 6b24-1.11.1-4ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | --------------- jtreg console summary for langtools ---------------
--------------- jtreg console summary for hotspot ---------------
|