pjfanning commented on code in PR #6953:
URL: https://github.com/apache/hadoop/pull/6953#discussion_r1715907737
##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/src/main/java/org/apache/hadoop/yarn/appcatalog/application/YarnServiceClient.java:
##########
@@ -46,6 +47,19 @@
public class YarnServiceClient {
private static final Logger LOG =
LoggerFactory.getLogger(YarnServiceClient.class);
+
+ /**
+ * It is more performant to reuse ObjectMapper instances but keeping the
instance
Review Comment:
I am a committer on the Jackson project. There is minimal synchronisation
and I am actively removing many of the remaining cases. Even today, it is more
performant to reuse ObjectMapper instead of creating multiple instances.
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