swaminathanmanish commented on code in PR #16803:
URL: https://github.com/apache/pinot/pull/16803#discussion_r2348614152


##########
pinot-core/src/main/java/org/apache/pinot/core/segment/processing/genericrow/AdaptiveSizeBasedWriter.java:
##########
@@ -41,11 +84,38 @@ public long getNumBytesWritten() {
 
   @Override
   public boolean canWrite() {
-    return _numBytesWritten < _bytesLimit;
+    return _numBytesWritten < _bytesLimit && !isDiskUsageExceeded();
   }
 
   @Override
   public void write(FileWriter<GenericRow> writer, GenericRow row) throws 
IOException {
     _numBytesWritten += writer.writeData(row);
   }
+
+  private boolean isDiskUsageExceeded() {

Review Comment:
   Thanks. We do something similar for disk utilization on server as well 
([DiskUtilization](https://github.com/apache/pinot/pull/15008/files#diff-45ef72f00a8de23d81b736119d86973704b95d8f1a0afe493f3f267609b9ddae)),
 so should be good on the call cost. 
   @krishan1390 to verify if the fileStore stats is for all of minion disk 
space.  
   
   



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