dlmarion commented on code in PR #6203:
URL: https://github.com/apache/accumulo/pull/6203#discussion_r2912447246


##########
server/base/src/main/java/org/apache/accumulo/server/security/SecurityOperation.java:
##########
@@ -355,11 +355,18 @@ private boolean _hasTablePermission(String user, TableId 
table, TablePermission
       boolean useCached) throws ThriftSecurityException {
     targetUserExists(user);
 
+    // Allow all users to read root and metadata tables
     if ((table.equals(SystemTables.METADATA.tableId()) || 
table.equals(SystemTables.ROOT.tableId()))
         && permission.equals(TablePermission.READ)) {
       return true;
     }
 
+    // Allow root user to scan all system tables
+    if (user.equals(getRootUsername()) && SystemTables.containsTableId(table)

Review Comment:
   Removing this and the code to give all users read permission in the Accumulo 
namespace causes the new code in the IT (below) to fail. Is this what you 
expected?
   
   ```
         verifyHasOnlyTheseTablePermissions(c, c.whoami(), 
SystemTables.FATE.tableName(),
             TablePermission.READ);
         verifyHasOnlyTheseTablePermissions(c, c.whoami(), 
SystemTables.SCAN_REF.tableName(),
             TablePermission.READ);
   ```



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