YARN-7432. Fix DominantResourceFairnessPolicy serializable findbugs issues. (Daniel Templeton via Subru).

hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml

@@ -177,6 +177,18 @@
   <Match>
     <Class name="org.apache.hadoop.yarn.server.resourcemanager.scheduler.policy.FairOrderingPolicy$FairComparator" />
     <Bug pattern="SE_COMPARATOR_SHOULD_BE_SERIALIZABLE" />
+  </Match>
+  <Match>
+    <Class name="org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.policies.DominantResourceFairnessPolicy$DominantResourceFairnessComparator" />
+    <Bug pattern="SE_COMPARATOR_SHOULD_BE_SERIALIZABLE" />
+  </Match>
+  <Match>
+    <Class name="org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.policies.DominantResourceFairnessPolicy$DominantResourceFairnessComparator2" />
+    <Bug pattern="SE_COMPARATOR_SHOULD_BE_SERIALIZABLE" />
+  </Match>
+  <Match>
+    <Class name="org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.policies.DominantResourceFairnessPolicy$DominantResourceFairnessComparatorN" />
+    <Bug pattern="SE_COMPARATOR_SHOULD_BE_SERIALIZABLE" />
   </Match>
     <Match>
     <Class name="org.apache.hadoop.yarn.server.resourcemanager.scheduler.policy.CompoundComparator" />