adamreeve commented on code in PR #44990:
URL: https://github.com/apache/arrow/pull/44990#discussion_r1953634919


##########
cpp/src/parquet/file_reader.cc:
##########
@@ -314,11 +314,7 @@ class SerializedFile : public ParquetFileReader::Contents {
     }
   }
 
-  void Close() override {
-    if (file_metadata_ && file_metadata_->file_decryptor()) {
-      file_metadata_->file_decryptor()->WipeOutDecryptionKeys();
-    }
-  }

Review Comment:
   The `InternalFileDecryptor` destructor still wipes out the decryption keys 
though. I guess that doesn't cause problems because the tests use a key 
retriever, so wiping out the keys in the `FileDecryptionProperties` has no 
effect. But I suspect we might see crashes again if we tested with keys set 
explicitly in `FileDecryptionProperties`.



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