rkhachatryan commented on code in PR #22251:
URL: https://github.com/apache/flink/pull/22251#discussion_r1147476097


##########
flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/DefaultJobGraphStore.java:
##########
@@ -241,6 +243,22 @@ public void putJobGraph(JobGraph jobGraph) throws 
Exception {
         LOG.info("Added {} to {}.", jobGraph, jobGraphStateHandleStore);
     }
 
+    @Override
+    public void putJobResourceRequirements(
+            JobID jobId, JobResourceRequirements jobResourceRequirements) 
throws Exception {
+        synchronized (lock) {
+            @Nullable final JobGraph jobGraph = recoverJobGraph(jobId);
+            if (jobGraph == null) {
+                throw new FileNotFoundException(
+                        String.format(
+                                "JobGraph for job [%s] was not found in 
JobGraphStore and is needed for attaching JobResourceRequirements.",
+                                jobId));
+            }
+            JobResourceRequirements.writeToJobGraph(jobGraph, 
jobResourceRequirements);
+            putJobGraph(jobGraph);

Review Comment:
   Per my understanding, in the worst case, a contender JM **_might_** discover 
that it's not the leader anymore while adding checkpoint to ZK/etcd.
   
   CheckpointCounters use `getAndIncrement` for new checkpoints.



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