kgeisz commented on code in PR #7007:
URL: https://github.com/apache/hbase/pull/7007#discussion_r2122228391


##########
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupCommands.java:
##########
@@ -876,6 +889,140 @@ private boolean canAnyOtherBackupCover(List<BackupInfo> 
allBackups, BackupInfo c
       return false;
     }
 
+    /**
+     * Cleans up Write-Ahead Logs (WALs) that are no longer required for PITR 
after a successful
+     * backup deletion.
+     */
+    private void cleanUpUnusedBackupWALs() throws IOException {
+      Configuration conf = getConf() != null ? getConf() : 
HBaseConfiguration.create();
+      String backupWalDir = conf.get(CONF_CONTINUOUS_BACKUP_WAL_DIR);
+
+      if (backupWalDir == null || backupWalDir.isEmpty()) {

Review Comment:
   nit - You can use `Strings.isNullOrEmpty()` from 
`org.apache.hbase.thirdparty.com.google.common.base`
   
   ```suggestion
         if (Strings.isNullOrEmpty(backupWalDir)) {
   ```



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