BlockCompressorStream#finish add check compressor.getBytesRead()>0 #4
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…compressor.getBytesRead()>0
famosss
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org.apache.hadoop.io.compress.BlockCompressorStream#finish is a public function,so other apps can call the method directly,such as
flume,but whencompressor.getBytesRead() == 0then it will write a null data,and then the data after the null data will not be read as they lost. So,please add the check in the method.Thank you.