ctubbsii commented on a change in pull request #2152:
URL: https://github.com/apache/accumulo/pull/2152#discussion_r648637616



##########
File path: 
core/src/main/java/org/apache/accumulo/core/metadata/schema/TabletsMetadata.java
##########
@@ -87,14 +99,23 @@
     private TableId tableId;
     private ReadConsistency readConsistency = ReadConsistency.IMMEDIATE;
     private AccumuloClient _client;
+    private Collection<KeyExtent> extents;
 
     Builder(AccumuloClient client) {
       this._client = client;
     }
 
     @Override
     public TabletsMetadata build() {
-      Preconditions.checkState((level == null) != (table == null),
+      if (extents != null) {
+        // its expected that things are not set for scanning a single range, 
so check that. It also
+        // expected that checkConsistency is not set as this check can not be 
done for
+        // non-contiguous tablets.

Review comment:
       I didn't understand this check before, but now that you've written it 
out, I think a more concise way to put this might be something like:
   
   ```suggestion
           // setting multiple extents with forTablets(extents) is mutually 
exclusive with these single-tablet options
   ```




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