When trying to detach disk via InstanceClient#detachDiskInstance the operation fails with the stacktrace ```java Sep 26, 2018 10:51:28 PM com.google.common.util.concurrent.AbstractFuture executeListener SEVERE: RuntimeException while executing runnable com.google.common.util.concurrent.Futures$4@7b8f7c5c with executor MoreExecutors.directExecutor() java.lang.IllegalArgumentException: Unrecognized http status code: 411 at com.google.api.gax.httpjson.HttpJsonStatusCode.httpStatusToStatusCode(HttpJsonStatusCode.java:102) at com.google.api.gax.httpjson.HttpJsonExceptionCallable$ExceptionTransformingFuture.onFailure(HttpJsonExceptionCallable.java:99) at com.google.api.core.ApiFutures$1.onFailure(ApiFutures.java:68) at com.google.common.util.concurrent.Futures$4.run(Futures.java:1123) at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:435) at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:900) at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:811) at com.google.common.util.concurrent.AbstractFuture.setException(AbstractFuture.java:675) at com.google.api.core.AbstractApiFuture$InternalSettableFuture.setException(AbstractApiFuture.java:95) at com.google.api.core.AbstractApiFuture.setException(AbstractApiFuture.java:77) at com.google.api.core.SettableApiFuture.setException(SettableApiFuture.java:52) at com.google.api.gax.httpjson.HttpRequestRunnable.run(HttpRequestRunnable.java:145) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) ```