chia7712 commented on code in PR #16010:
URL: https://github.com/apache/kafka/pull/16010#discussion_r1608610743


##########
core/src/main/scala/kafka/tools/StorageTool.scala:
##########
@@ -452,19 +452,20 @@ object StorageTool extends Logging {
       stream.println("All of the log directories are already formatted.")
     } else {
       metaPropertiesEnsemble.emptyLogDirs().forEach(logDir => {
-        copier.setLogDirProps(logDir, new 
MetaProperties.Builder(metaProperties).
-          setDirectoryId(copier.generateValidDirectoryId()).
+        val loggingCopier = new 
MetaPropertiesEnsemble.Copier(metaPropertiesEnsemble)
+        loggingCopier.setLogDirProps(logDir, new 
MetaProperties.Builder(metaProperties).
+          setDirectoryId(loggingCopier.generateValidDirectoryId()).
           build())
-        copier.setPreWriteHandler((logDir, _, _) => {
+        loggingCopier.setPreWriteHandler((logDir, _, _) => {
           stream.println(s"Formatting $logDir with metadata.version 
$metadataVersion.")
           Files.createDirectories(Paths.get(logDir))
           val bootstrapDirectory = new BootstrapDirectory(logDir, 
Optional.empty())
           bootstrapDirectory.writeBinaryFile(bootstrapMetadata)
         })
-        copier.setWriteErrorHandler((logDir, e) => {
+        loggingCopier.setWriteErrorHandler((logDir, e) => {
           throw new TerseFailure(s"Error while writing meta.properties file 
$logDir: ${e.getMessage}")
         })
-        copier.writeLogDirChanges()

Review Comment:
   Maybe the simpler solution is move `copier.writeLogDirChanges()` out of 
loop. 



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