Regular error "Lifecycle mapping "org.eclipse.m2e.jdt.JarLifecycleMapping" is not available"

(Originally reported in https://github.com/Microsoft/vscode-maven/issues/115 by @lashchev )

Describe the bug
Very often I get this error: Lifecycle mapping "org.eclipse.m2e.jdt.JarLifecycleMapping" is not available. To enable full functionality, install the lifecycle mapping and run Maven->Update Project Configuration.

The strangest thing is that it happens when there were no updates in pom.xml or any other project-level files, when I am just editing *.java files. Sometimes it happens at the same time when "Language Support for Java" extension has issues parsing the files and dumps some errors in the log.

Also, "Maven->Update Project Configuration" (and Shift+Alt+U) works for me only if I have pom.xml open and it's window is active (which is unexpected).

Even "Maven->Update Project Configuration" does not always work for me.

First I typically need to fix all Java compilation issues and then I need to re-open VSCode and let it sit for a few minutes - then "Update Project Configuration" will start working. Sometimes I need to restart VSCode 2 or 3 times to finally make it work though.

Since VSCode restart fixes the issue - the recommendation to "install the lifecycle mapping" is pretty misleading in the message.

To Reproduce
It happens randomly, often when opening Java project that has compilation issues, but can appear while editing already opened project.

Expected behavior
Error shouldn't happen and if the only fix is to "Update configuration" - then it should be attempted automatically.

Environments (please complete the following information as much as possible):

• OS: Windows 10 v1803
• VS Code version: 1.25.1
• Extension version 0.10.0

まず、pom.xml を含む Java プロジェクトで lifecycle-mapping エラーを再現します。特に Java ファイルにコンパイル上の問題がある場合に再現し、拡張機能のログを調べます。Maven → Update Project Configuration コマンドと、pom.xml がアクティブなファイルではない場合の動作を確認します。誤解を招くエラーが発生しなくなるか、設定の更新が確実に試行されれば完了です。