[KAFKA-6855] Kafka fails to start with Java 10 due to faulty Java version detection

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.1.1, 2.0.0
• Component/s: core
• Environment: Ubuntu 18.04 ; Java 10
• Assignee: Ismael Juma
• Reporter: Anders Tornblad
• Created: 03/May/18 14:37
• Updated: 03/May/18 16:30
• Resolved: 03/May/18 16:30

Description

After downloading fresh installations of ZooKeeper and Kafka, and then starting ZooKeeper and Kafka the way that is recommended on http://kafka.apache.org/documentation/#quickstart the following error message is shown:

Unrecognized VM option 'PrintGCDateStamps'

I found the error in the kafka-run-class.sh file, where the Java version is determined and put in the JAVA_MAJOR_VERSION variable. My Java runtime reports the version as openjdk version "10.0.1" 2018-04-17, which makes the JAVA_MAJOR_VERSION value be "10 2018-04-17" instead of just "10". That makes the subsequent if statement fail.

I found the following line to fix the problem:

JAVA_MAJOR_VERSION=$($JAVA -version 2>&1 | sed -E -n 's/.* version "([^.-])./\1p')