[ML] Anomaly Explorer - blank page on swimlane label tooltip load

[pheyos]

Found in version

• 8.0.0 latest
• 7.7.0 mini stack build 2248

Browser

• Chrome

Steps to reproduce

• Navigate to the anomaly explorer
• Hover a swimlane label

Expected result

• A tooltip containing the swimlane label is displayed

Actual result

• The anomaly explorer area turns blank
• An error is logged to the browser console:

  hostReportError.js:3 Uncaught TypeError: Cannot read property 'key' of undefined
    at chart_tooltip.tsx:109
    at Array.map (<anonymous>)
    at ChartTooltip (chart_tooltip.tsx:96)
    at renderWithHooks (react-dom.development.js:16260)
    at updateFunctionComponent (react-dom.development.js:18347)
    at beginWork$1 (react-dom.development.js:20176)
    at HTMLUnknownElement.callCallback (react-dom.development.js:336)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:385)
    at invokeGuardedCallback (react-dom.development.js:440)
    at beginWork$$1 (react-dom.development.js:25780)
  

Additional information

• On Firefox, the result is the same, but the error console message is different:

  TypeError: "seriesIdentifier is undefined"
    ChartTooltip http://localhost:5601/bundles/plugin/ml/1.plugin.js:1
    ChartTooltip http://localhost:5601/bundles/plugin/ml/1.plugin.js:1
    ca http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    Ga http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    As http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    hl http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    ml http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    il http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    Kr http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    unstable_runWithPriority http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:408
    $r http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    Kr http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    Yr http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    el http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    Oa http://localhost:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:400
    __tryOrUnsub http://localhost:5601/bundles/plugin/ml/ml.plugin.js:15
    next http://localhost:5601/bundles/plugin/ml/ml.plugin.js:15
    _next http://localhost:5601/bundles/plugin/ml/ml.plugin.js:15
    next http://localhost:5601/bundles/plugin/ml/ml.plugin.js:15
    next http://localhost:5601/bundles/plugin/ml/ml.plugin.js:15
    next http://localhost:5601/bundles/plugin/ml/ml.plugin.js:34
    show http://localhost:5601/bundles/plugin/ml/1.plugin.js:1
    renderSwimlane http://localhost:5601/bundles/plugin/ml/1.plugin.js:1
    d3_selection_onListener http://localhost:5601/bundles/plugin/ml/ml.plugin.js:69
  

[elasticmachine]

Pinging @elastic/ml-ui (:ml)