Workaround for corrupted tasklist command

Signed-off-by: Snjezana Peco <[email protected]>

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/ParentProcessWatcher.java

@@ -45,6 +45,7 @@ public ParentProcessWatcher(LanguageServer server ) {
 	@Override
 	public void run() {
 		if (!parentProcessStillRunning()) {
+			JavaLanguageServerPlugin.logInfo("Parent process stopped running, forcing server exit");
 			task.cancel(true);
 			server.exit();
 		}
@@ -77,6 +78,11 @@ private boolean parentProcessStillRunning() {
 				process.destroy();
 				finished = process.waitFor(POLL_DELAY_SECS, TimeUnit.SECONDS); // wait for the process to stop
 			}
+			if (Platform.OS_WIN32.equals(Platform.getOS()) && finished && process.exitValue() > 1) {
+				// the tasklist command should return 0 (parent process exists) or 1 (parent process doesn't exist)
+				JavaLanguageServerPlugin.logInfo("The tasklist command: '" + command + "' returns " + process.exitValue());
+				return true;
+			}
 			return !finished || process.exitValue() == 0;
 		} catch (IOException | InterruptedException e) {
 			JavaLanguageServerPlugin.logException(e.getMessage(), e);