Message acknowledged even in case exception thrown

[amarkevich]

Function

public class FunctionCommand implements BackgroundFunction<Message> {
  @Override
  public void accept(Message message, Context context) throws Exception {
    throw new Exception();
  }
}

Expected: message NACK
Actual: Function execution took 2431 ms, finished with status: 'ok'

Failed execution produce only stacktrace:

...
com.wedextim.function.command.FunctionCommand.accept(FunctionCommand.java:18)
com.google.cloud.functions.invoker.BackgroundFunctionExecutor$TypedFunctionExecutor.serviceLegacyEvent(BackgroundFunctionExecutor.java:285)
com.google.cloud.functions.invoker.BackgroundFunctionExecutor.lambda$serviceLegacyEvent$8(BackgroundFunctionExecutor.java:375)
com.google.cloud.functions.invoker.BackgroundFunctionExecutor.runWithContextClassLoader(BackgroundFunctionExecutor.java:382)
com.google.cloud.functions.invoker.BackgroundFunctionExecutor.serviceLegacyEvent(BackgroundFunctionExecutor.java:375)
com.google.cloud.functions.invoker.BackgroundFunctionExecutor.service(BackgroundFunctionExecutor.java:330)
javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:755)
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:547)
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1297)
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1212)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
com.google.cloud.functions.invoker.runner.Invoker$NotFoundHandler.handle(Invoker.java:392)
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
org.eclipse.jetty.server.Server.handle(Server.java:500)
org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270)
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:135)
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
java.base/java.lang.Thread.run(Thread.java:829)