HADOOP-13579. Fix source-level compatibility after HADOOP-11252. Contributed by Tsuyoshi Ozawa.

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -42,6 +42,9 @@ Release 2.6.5 - UNRELEASED
     HADOOP-13297. Add missing dependency in setting
     maven-remote-resource-plugin to fix builds. (Sean Busbey via aajisaka)
 
+    HADOOP-13579. Fix source-level compatibility after HADOOP-11252.
+    (Tsuyoshi Ozawa via aajisaka)
+
 Release 2.6.4 - 2016-02-11
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java

@@ -211,7 +211,8 @@ public class Client {
    * @param conf Configuration
    * @param pingInterval the ping interval
    */
-  static final void setPingInterval(Configuration conf, int pingInterval) {
+  public static final void setPingInterval(Configuration conf,
+      int pingInterval) {
     conf.setInt(CommonConfigurationKeys.IPC_PING_INTERVAL_KEY, pingInterval);
   }
 
@@ -222,7 +223,7 @@ public class Client {
    * @param conf Configuration
    * @return the ping interval
    */
-  static final int getPingInterval(Configuration conf) {
+  public static final int getPingInterval(Configuration conf) {
     return conf.getInt(CommonConfigurationKeys.IPC_PING_INTERVAL_KEY,
         CommonConfigurationKeys.IPC_PING_INTERVAL_DEFAULT);
   }