PermissionError: [Errno 13] Permission denied with --java-executable argument

[jakDev003]

Hello I am trying to run JDTLS with Helix.

I am getting Permission Error reported from Helix.

I have to run two versions of Java due to my company using Java 8 and JTDLS needing Java 17 or higher.

In my bashrc I have Java 8 set like so:

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64
export PATH=$PATH:$JAVA_HOME/bin

When I try to test with the command jdtls I am getting the following error:

Traceback (most recent call last):
  File "/usr/local/bin/jdtls/bin/jdtls", line 17, in <module>
    jdtls.main(sys.argv[1:])
  File "/usr/local/bin/jdtls/bin/jdtls.py", line 87, in main
    java_executable = get_java_executable(known_args)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/bin/jdtls/bin/jdtls.py", line 44, in get_java_executable
    raise Exception("jdtls requires at least Java 17")
Exception: jdtls requires at least Java 17

When I try to run the command to use Java 21

jdtls --java-executable=/usr/lib/jvm/java-21-openjdk-amd64/bin

I get the following error which matches what Helix shows in the logs:

Traceback (most recent call last):
  File "/usr/local/bin/jdtls/bin/jdtls", line 17, in <module>
    jdtls.main(sys.argv[1:])
  File "/usr/local/bin/jdtls/bin/jdtls.py", line 87, in main
    java_executable = get_java_executable(known_args)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/bin/jdtls/bin/jdtls.py", line 37, in get_java_executable
    out = subprocess.check_output([java_executable, '-version'], stderr = subprocess.STDOUT, universal_newlines=True)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/subprocess.py", line 466, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/subprocess.py", line 548, in run
    with Popen(*popenargs, **kwargs) as process:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/subprocess.py", line 1026, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib/python3.12/subprocess.py", line 1955, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
PermissionError: [Errno 13] Permission denied: '/usr/lib/jvm/java-21-openjdk-amd64/bin'

[rgrunber]

What happens if you try :

jdtls --java-executable=/usr/lib/jvm/java-21-openjdk-amd64/bin/java

(ie. have --java-executable point to the java executable and not just the folder under which it is located)

  --java-executable JAVA_EXECUTABLE
                        Path to java executable used to start runtime.