HDFS-2993. HA: BackupNode#checkOperation should permit CHECKPOINT operations. Contributed by Eli Collins

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-1623@1292688 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.HDFS-1623.txt

@@ -228,3 +228,5 @@ HDFS-2972. Small optimization building incremental block report (todd)
 HDFS-2973. Re-enable NO_ACK optimization for block deletion. (todd)
 
 HDFS-2922. HA: close out operation categories (eli)
+
+HDFS-2993. HA: BackupNode#checkOperation should permit CHECKPOINT operations (eli)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/BackupNode.java

@@ -407,7 +407,8 @@ public class BackupNode extends NameNode {
     @Override // NameNode
     public void checkOperation(OperationCategory op)
         throws StandbyException {
-      if (op == OperationCategory.UNCHECKED) {
+      if (op == OperationCategory.UNCHECKED ||
+          op == OperationCategory.CHECKPOINT) {
         return;
       }
       if (OperationCategory.JOURNAL != op &&