unexpected boolean in XMLRPC one.vmpool.calculateshowback method response

[atodorov-storpool]

Description
Following the XMLRPC API documentation the method one.vmpool.calculateshowback should have "empty" or the error string as its second argument but boolean is returned:

<?xml version="1.0" encoding="UTF-8"?>
<methodResponse>
  <params>
    <param>
    <value>
      <array>
        <data>
          <value>
            <boolean>1</boolean>
          </value>
          <value>
            <boolean>1</boolean>
          </value>
          <value>
            <i4>0</i4>
          </value>
        </data>
      </array>
    </value>
    </param>
  </params>
</methodResponse>

To Reproduce
Do XMLRPC call for one.vmpool.calculateshowback

<?xml version="1.0"?>
<methodCall>
  <methodName>one.vmpool.calculateshowback</methodName>
  <params>
    <param>
    <value>
      <string>oneadmin:a3bb9df47c0c5e12b9f4073ef0a791098ad88c36</string>
    </value>
    </param>
    <param>
    <value>
      <i4>-1</i4>
    </value>
    </param>
    <param>
    <value>
      <i4>-1</i4>
    </value>
    </param>
    <param>
    <value>
      <i4>-1</i4>
    </value>
    </param>
    <param>
    <value>
      <i4>-1</i4>
    </value>
    </param>
  </params>
</methodCall>

And look at the method response.

Expected behavior
Expecting a string

Details

• Affected Component: [api]
• Hypervisor: [n/a]
• Version: [5.8.0]

Additional context
If could be a documentation issue, though.

Progress Status

• Branch created
• Code committed to development branch
• Testing - QA
• Documentation
• Release notes - resolved issues, compatibility, known issues
• Code committed to upstream release/hotfix branches
• Documentation committed to upstream release/hotfix branches

[paczerny]

PRs to merge to 5.8 and master:

• code: B #3174: Fix response for calculateshowback #3718
• docs: B Opennebula/one#3174: Update resolved issues docs#764