tomscut commented on a change in pull request #3635:
URL: https://github.com/apache/hadoop/pull/3635#discussion_r750410323
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File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/CallerContext.java
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@@ -228,6 +228,26 @@ public Builder append(String key, String value) {
return this;
}
+ /**
+ * Append new field which contains key and value to the context
+ * if the key("key:") is absent.
+ * @param key the key of field.
+ * @param value the value of field.
+ * @return the builder.
+ */
+ public Builder appendIfAbsent(String key, String value) {
Review comment:
> As this is pretty core; I would prefer to do the changes to commons in
a HADOOP JIRA.
Hi @goiri , I filed a HADOOP JIRA
[HADOOP-18003](https://issues.apache.org/jira/browse/HADOOP-18003) and the
relevant PR has been merged. I rebased this PR. Could you please help review
the code. Thank you very much.
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