Github user uce commented on a diff in the pull request:
https://github.com/apache/flink/pull/1153#discussion_r41399491
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/StandaloneSubmittedJobGraphs.java
---
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.jobmanager;
+
+import org.apache.flink.api.common.JobID;
+import org.apache.flink.runtime.jobgraph.JobGraph;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * {@link SubmittedJobGraph} instances for JobManagers running in {@link
RecoveryMode#STANDALONE}.
+ *
+ * <p>All operations are NoOps, because {@link JobGraph} instances cannot
be recovered in this
+ * recovery mode.
+ */
+public class StandaloneSubmittedJobGraphs implements SubmittedJobGraphs {
+
+ @Override
+ public void start(SubmittedJobGraphListener jobGraphListener) throws
Exception {
+ // Nothing to do
+ }
+
+ @Override
+ public void stop() {
+ // Nothing to do
+ }
+
+ @Override
+ public void putJobGraph(SubmittedJobGraph jobGraph) throws Exception {
+ // Nothing to do
+ }
+
+ @Override
+ public void removeJobGraph(JobID jobId) throws Exception {
+ // Nothing to do
+ }
+
+ @Override
+ public SubmittedJobGraph recoverJobGraph(JobID jobId) throws Exception {
+ throw new IllegalStateException("StandaloneSubmittedJobGraphs
cannot recover job graphs. " +
+ "How did you end up here?");
+ }
+
+ @Override
+ public List<SubmittedJobGraph> recoverJobGraphs() throws Exception {
+ return Collections.emptyList();
--- End diff --
Resolved (returning an Optional)
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