add telemetry to give insight for experiment (#212401)

* add telemetry to give insight for experiment

* conventional event name, skip for cancellation

src/vs/workbench/contrib/notebook/common/notebookEditorModel.ts

@@ -15,6 +15,7 @@ import { assertType } from 'vs/base/common/types';
 import { URI } from 'vs/base/common/uri';
 import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
 import { IWriteFileOptions, IFileStatWithMetadata } from 'vs/platform/files/common/files';
+import { ITelemetryService } from 'vs/platform/telemetry/common/telemetry';
 import { IRevertOptions, ISaveOptions, IUntypedEditorInput } from 'vs/workbench/common/editor';
 import { EditorModel } from 'vs/workbench/common/editor/editorModel';
 import { NotebookTextModel } from 'vs/workbench/contrib/notebook/common/model/notebookTextModel';
@@ -241,8 +242,30 @@ export class NotebookFileWorkingCopyModel extends Disposable implements IStoredF
 				throw new CancellationError();
 			}
 
-			const stat = await serializer.save(this._notebookModel.uri, this._notebookModel.versionId, options, token);
-			return stat;
+			try {
+				const stat = await serializer.save(this._notebookModel.uri, this._notebookModel.versionId, options, token);
+				return stat;
+			} catch (error) {
+				if (!token.isCancellationRequested) {
+					type notebookSaveErrorData = {
+						isRemote: boolean;
+						versionMismatch: boolean;
+					};
+					type notebookSaveErrorClassification = {
+						owner: 'amunger';
+						comment: 'Detect if we are having issues saving a notebook on the Extension Host';
+						isRemote: { classification: 'SystemMetaData'; purpose: 'PerformanceAndHealth'; comment: 'Whether the save is happening on a remote file system' };
+						versionMismatch: { classification: 'SystemMetaData'; purpose: 'PerformanceAndHealth'; comment: 'If the error was because of a version mismatch' };
+					};
+					const telemetry = {} as ITelemetryService;
+					telemetry.publicLogError2<notebookSaveErrorData, notebookSaveErrorClassification>('notebook/SaveError', {
+						isRemote: this._notebookModel.uri.scheme === Schemas.vscodeRemote,
+						versionMismatch: error instanceof Error && error.message === 'Document version mismatch'
+					});
+				}
+
+				throw error;
+			}
 		};
 	}