JFR recording fails to start with "IllegalArgumentException: Unknown diagnostic command"

Issue

• Trying to start the JDK Flight Recorder (JFR) recording fails:

$ jcmd 123456 JFR.start
123456:
java.lang.IllegalArgumentException: Unknown diagnostic command

• The Java process does not support JFR recordings:

$ ./jcmd 123456 help
123456:
The following commands are available:
VM.native_memory
ManagementAgent.stop
ManagementAgent.start_local
ManagementAgent.start
VM.classloader_stats
GC.rotate_log
Thread.print
GC.class_stats
GC.class_histogram
GC.heap_dump
GC.finalizer_info
GC.heap_info
GC.run_finalization
GC.run
VM.uptime
VM.dynlibs
VM.flags
VM.system_properties
VM.command_line
VM.version
help