BukrosSzabolcs commented on a change in pull request #3751:
URL: https://github.com/apache/hbase/pull/3751#discussion_r732525043



##########
File path: 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/DefaultCompactor.java
##########
@@ -63,22 +63,30 @@ public StoreFileWriter createWriter(InternalScanner scanner,
   }
 
   @Override
-  protected List<Path> commitWriter(StoreFileWriter writer, FileDetails fd,
+  protected List<Path> commitWriter(FileDetails fd,
       CompactionRequestImpl request) throws IOException {
     List<Path> newFiles = Lists.newArrayList(writer.getPath());
     writer.appendMetadata(fd.maxSeqId, request.isAllFiles(), 
request.getFiles());
     writer.close();
+    writer = null;

Review comment:
       writer was refactored to be a class variable so I can list current 
compaction targets any time and can avoid deleting them. So the variable is 
re-used and have to be cleaned up after a compaction.




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