UI loads blank page when metrics data is null

[swaroopar]

currently when metrics data is null , the UI component crashes and we see an empty page.

instead, we must show an empty graph.

[
    {
        "name": "cpu_usage",
        "description": null,
        "type": "gauge",
        "monitorResourceType": "cpu",
        "unit": "percentage",
        "labels": {
            "name": "kafka-zookeeper-f0a989a7",
            "id": "ddde36a9-e7c3-4c14-9d3a-d81c2beda963"
        },
        "metrics": null
    },
    {
        "name": "cpu_usage",
        "description": null,
        "type": "gauge",
        "monitorResourceType": "cpu",
        "unit": "percentage",
        "labels": {
            "name": "kafka-broker-f0a989a7-2",
            "id": "311874f8-71e5-4ffe-902b-5e67804928cf"
        },
        "metrics": null
    },
    {
        "name": "cpu_usage",
        "description": null,
        "type": "gauge",
        "monitorResourceType": "cpu",
        "unit": "percentage",
        "labels": {
            "name": "kafka-broker-f0a989a7-0",
            "id": "9292692f-ce1f-4cbe-bb8f-c1a68770f56c"
        },
        "metrics": null
    },
    {
        "name": "cpu_usage",
        "description": null,
        "type": "gauge",
        "monitorResourceType": "cpu",
        "unit": "percentage",
        "labels": {
            "name": "kafka-broker-f0a989a7-1",
            "id": "493ef255-ae75-42a7-a749-ad673e052680"
        },
        "metrics": null
    }
]

[Alice1319]

I'll take this.

[swaroopar]

@WangLiNaruto has tried his best to reproduce this issue but it was not possible. the graph was working fine when the metrics is null.

Will close this ticket for now and open a new bug if the same issue is observed again.