Command to monitor Jenkins idle status no longer working. Is there another way?

As part of an Ansible automation to update Jenkins Node Docker Containers… we validate if a Jenkins node is currently being used by using the following command:

curl -X POST -L --user useraccount:‘apitoken’ “https://jenkins.domain.com:8443/computer/agent-1/api/json?pretty=true” -k | grep “idle”
“idle” : true,

When idle true comes back we know we can take the node offline without affecting any running jobs.

We just migrated to Java 11 and Jenkins 2.357 on a server. Now there is no idle status using that command.

Is there another way to monitor if node is being used to get active/idle status?

Just tested on the source code state from yesterday and ‘idle’ is still in there.

the command still works with Jenkins 2.349 and Java 8.

This is the start of the data I get back when running that command on the Jenkins 2.357 Java 11 server/node:
Does this help identify what I’m getting back?

<title>Jenkins [Jenkins]</title><link rel="stylesheet" href="/static/8e0e9f61/jsbundles/styles.css" type="text/css"></link><link rel="stylesheet" href="/static/8e0e9f61/css/responsive-grid.css" type="text/css"></link><link rel="shortcut icon" href="/static/8e0e9f61/favicon.ico" type="image/vnd.microsoft.icon"></link><script src="/static/8e0e9f61/scripts/prototype.js" type="text/javascript"></script><script src="/static/8e0e9f61/scripts/behavior.js" type="text/javascript"></script><script src='/adjuncts/8e0e9f61/org/kohsuke/stapler/bind.js' type='text/javascript'></script><script src="/static/8e0e9f61/scripts/yui/yahoo/yahoo-min.js"></script><script src="/static/8e0e9f61/scripts/yui/dom/dom-min.js"></script><script src="/static/8e0e9f61/scripts/yui/event/event-min.js"></script><script src="/static/8e0e9f61/scripts/yui/animation/animation-min.js"></script><script src="/static/8e0e9f61/scripts/yui/dragdrop/dragdrop-min.js"></script><script src="/static/8e0e9f61/scripts/yui/container/container-min.js"></script><script src="/static/8e0e9f61/scripts/yui/connection/connection-min.js"></script><script src="/static/8e0e9f61/scripts/yui/datasource/datasource-min.js"></script><script src="/static/8e0e9f61/scripts/yui/autocomplete/autocomplete-min.js"></script><script src="/static/8e0e9f61/scripts/yui/menu/menu-min.js"></script><script src="/static/8e0e9f61/scripts/yui/element/element-min.js"></script><script src="/static/8e0e9f61/scripts/yui/button/button-min.js"></script><script src="/static/8e0e9f61/scripts/yui/storage/storage-min.js"></script><script src="/static/8e0e9f61/scripts/hudson-behavior.js" type="text/javascript"></script><script src="/static/8e0e9f61/scripts/sortable.js" type="text/javascript"></script><link rel="stylesheet" href="/static/8e0e9f61/scripts/yui/container/assets/container.css" type="text/css"></link><link rel="stylesheet" href="/static/8e0e9f61/scripts/yui/container/assets/skins/sam/container.css" type="text/css"></link><link rel="stylesheet" href="/static/8e0e9f61/scripts/yui/menu/assets/skins/sam/menu.css" type="text/css"></link><link rel="search" href="/opensearch.xml" type="application/opensearchdescription+xml" title="Jenkins"></link><meta name="ROBOTS" content="INDEX,NOFOLLOW"></meta><meta name="viewport" content="width=device-width, initial-scale=1"></meta><script src="/adjuncts/8e0e9f61/org/kohsuke/stapler/jquery/jquery.full.js" type="text/javascript"></script><script>var Q=jQuery.noConflict()</script><script>
  if(window.Prototype && JSON) {
    var _json_stringify = JSON.stringify;
    JSON.stringify = function(value) {
        var _array_tojson = Array.prototype.toJSON;
        delete Array.prototype.toJSON;
        var r=_json_stringify(value);
        Array.prototype.toJSON = _array_tojson;
        return r;
    };
 }

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thats an html page. You could pipe it through w3m to see what it renders as, but look for like

or

tags

Also if you havn’t looked at it, for handling json, jq > grep. It would tell you that the results are not json and stuff.