HDDS-14044. Handle nullish values for Deletion Progress in OM UI (#9625)

Author: spacemonkd

hadoop-ozone/ozone-manager/src/main/resources/webapps/ozoneManager/om-overview.html

@@ -94,11 +94,11 @@ <h2>Meta-Data Volume Information</h2>
 
 <!-- Only display Deletion Progress on OM leader -->
 <div ng-show="$ctrl.role.Role.trim() === 'LEADER'">
-  <h2>Deletion Progress [since {{$ctrl.overview.jmx.MetricsResetTimeStamp * 1000 | date:'yyyy-MM-dd HH:mm:ss'}}]
+  <h2>Deletion Progress [{{$ctrl.overview.jmx.MetricsResetTimeStamp ? 'since ' + ($ctrl.overview.jmx.MetricsResetTimeStamp * 1000 | date:'yyyy-MM-dd HH:mm:ss') : 'Initializing'}}]
     &nbsp;&nbsp;•&nbsp;&nbsp;
     <b>Size Reclaimed:</b> {{$ctrl.formatBytes($ctrl.overview.jmx.ReclaimedSizeInInterval)}}
     &nbsp;&nbsp;•&nbsp;&nbsp;
-    <b>Keys Reclaimed:</b> {{$ctrl.overview.jmx.KeysReclaimedInInterval}}
+    <b>Keys Reclaimed:</b> {{$ctrl.overview.jmx.KeysReclaimedInInterval || 0}}
   </h2>
   <div class="mt-4">
       <div class="mt-3">

hadoop-ozone/ozone-manager/src/main/resources/webapps/ozoneManager/ozoneManager.js

@@ -119,6 +119,7 @@
 
             ctrl.formatBytes = function(bytes, decimals) {
                if(bytes == 0) return '0 Bytes';
+               if (!bytes) return 'N/A';
                var k = 1024, // or 1024 for binary
                    dm = decimals + 1 || 3,
                    sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],