[Bug] JVM Details view produces "Unparseable Input Document" error

[andrewazores]

Current Behavior

When clicking "View More" on the JVM Details card content, all the fields come up with "Unknown" values and an error message "Unparseable Input Document" appears.

Expected Behavior

There should be no error message, and the JVM details such as operating system, JDK version and vendor, etc. should appear.

Steps To Reproduce

1. cd cryostat3
2. ./smoketest.bash
3. Select Cryostat itself as the target
4. Add a JVM Details card to the Dashboard, or go to the Topology view and select the Cryostat target
5. Click "View More"

Environment

No response

Anything else?

[andrewazores]

Query:

{
  "query": " query MBeanMXMetricsForTarget(id: BigInteger!) { targetNodes(filter: { targetIds: [$id] }) { target { mbeanMetrics { runtime { startTime vmVendor vmVersion classPath libraryPath inputArguments systemProperties { key value } } os { name version arch availableProcessors totalPhysicalMemorySize totalSwapSpaceSize } } } } }",
  "variables": {
    "id": 2
  }
}

Response:

{
  "errors": [
    {
      "message": "Unparseable input document",
      "locations": [],
      "extensions": {
        "classification": "DataFetchingException"
      }
    }
  ],
  "data": null
}

This happens for any selected target.

[andrewazores]

This actually only applies to https://github.com/cryostatio/cryostat-web/pull/1245 .