HDFS-16704. Datanode return empty response instead of NPE for GetVolu…

…meInfo during restarting (apache#4661). Contributed by ZanderXu. Signed-off-by: Ayush Saxena <[email protected]> Signed-off-by: He Xiaoqiao <[email protected]>
HarshitGupta11 · Nov 28, 2022 · ac436dd · ac436dd
1 parent 8db5e71
commit ac436dd
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/...fs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java b/...fs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
@@ -3628,7 +3628,10 @@ public String getBPServiceActorInfo() {
    */
   @Override // DataNodeMXBean
   public String getVolumeInfo() {
-    Preconditions.checkNotNull(data, "Storage not yet initialized");
+    if (data == null) {
+      LOG.debug("Storage not yet initialized.");
+      return "";
+    }
     return JSON.toString(data.getVolumeInfoMap());
   }