HDFS-5388. Loading fsimage fails to find cache pools during namenode startup (Chris Nauroth via Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4949@1533616 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-4949.txt

@@ -101,3 +101,6 @@ HDFS-4949 (Unreleased)
     -replication parameter. (cnauroth)
 
     HDFS-5383. fix broken caching unit tests. (Andrew Wang)
+
+    HDFS-5388. Loading fsimage fails to find cache pools during namenode
+    startup.  (Chris Nauroth via Colin Patrick McCabe)

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

@@ -742,7 +742,7 @@ public final class CacheManager {
       String poolName = Text.readString(in);
       // Get pool reference by looking it up in the map
       CachePool pool = cachePools.get(poolName);
-      if (pool != null) {
+      if (pool == null) {
         throw new IOException("Entry refers to pool " + poolName +
             ", which does not exist.");
       }