ADDITIONAL SYSTEM INFORMATION :
PS C:\programs\jdk-11\bin> .\java -version
openjdk version "11-ea" 2018-09-25
OpenJDK Runtime Environment 18.9 (build 11-ea+16)
OpenJDK 64-Bit Server VM 18.9 (build 11-ea+16, mixed mode)

A DESCRIPTION OF THE PROBLEM :
Unable to start java process with flight recording
PS C:\programs\jdk-11\bin> .\java -XX:StartFlightRecording=duration=60s,filename=myrecording.jfr MyApp
java.lang.IllegalArgumentException: Integer parsing error nanotime value: illegal unit
Error occurred during initialization of VM
Failure when starting JFR on_vm_start

REGRESSION : Last worked in version 8u171

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. .\java -XX:StartFlightRecording=duration=60s,filename=myrecording.jfr MyApp

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
program runs or class not found with myrecording.jfr file created
ACTUAL -
java.lang.IllegalArgumentException: Integer parsing error nanotime value: illegal unit
Error occurred during initialization of VM
Failure when starting JFR on_vm_start

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FREQUENCY : always