unrecognized option --help
jmap: obtain heap information about a Java process
 Usage:
    jmap <option>* <vmid>
        <vmid>: Attach API VM ID as shown in jps or other Attach API-based tools
        <vmid>s are read from stdin if none are supplied as arguments
    -histo: print statistics about classes on the heap, including number of objects and aggregate size
    -histo:live : Print only live objects
    -J: supply arguments to the Java VM running jmap
NOTE: this utility might significantly affect the performance of the target VM.
At least one option must be selected.