Nomad: Unable to detect java driver for openj9 jvm

[chenjpu]

Nomad version

Nomad v0.9.0-beta2

Operating system and Environment details

OS: centos 7.6
JAVA:
java -version

openjdk version "1.8.0_192"
OpenJDK Runtime Environment (build 1.8.0_192-b12_openj9)
Eclipse OpenJ9 VM (build openj9-0.11.0, JRE 1.8.0 Linux amd64-64-Bit Compressed References
20181107_95 (JIT enabled, AOT enabled)
OpenJ9 - 090ff9dcd
OMR - ea548a66
JCL - b5a3affe73 based on jdk8u192-b12)

Issue

java driver Detected No

[shantanugadgil]

hi, could you give some details as to how you have captured the above output and how Nomad is being started? which user? etc.

Nomad not detecting JAVA usually indicates that the Nomad process could not find "java" in its PATH (when nomad started up)

[chenjpu]

Thanks @shantanugadgil

1.Nomad start use systemd and root user
2.run java -version on my node ,output
openjdk version "1.8.0_192" OpenJDK Runtime Environment (build 1.8.0_192-b12_openj9) Eclipse OpenJ9 VM (build openj9-0.11.0, JRE 1.8.0 Linux amd64-64-Bit Compressed References 20181107_95 (JIT enabled, AOT enabled) OpenJ9 - 090ff9dcd OMR - ea548a66 JCL - b5a3affe73 based on jdk8u192-b12)

i found parseJavaVersionOutput check length is 3,but on my node java -version output lines length is 7

[chenjpu]

@shantanugadgil
it's ok in nomad version 0.8.7, after update to 0.9.0-beta2 can not detect java driver

[notnoop]

Thanks for reporting this bug. This definitely is a regression - looks like v0.8 nomad marked java as detected if java -version has zero exit code even if the output format isn't expected, unlike 0.9.0-beta2. We should fix this.

[notnoop]

@chenjpu Thank you so much for reporting the bug. We merged a fix that should be out in the next beta/rc release. Would love it if you can test drive and send us any feedback. Thanks!