In order to get rid of hundreds of failures in the Hotspot nightly we should update the jib-profile to require b09 of jtreg:

diff --git a/make/conf/jib-profiles.js b/make/conf/jib-profiles.js
--- a/make/conf/jib-profiles.js
+++ b/make/conf/jib-profiles.js
@@ -1063,7 +1063,7 @@
         jtreg: {
             server: "javare",
             revision: "4.2",
- build_number: "b08",
+ build_number: "b09",
             checksum_file: "MD5_VALUES",
             file: "jtreg_bin-4.2.zip",
             environment_name: "JT_HOME",