HDFS: Number of excess replica is not getting updated in hdfs fsck "-blockId" option for over-replicated blocks

Number of excess replica is not getting updated in hdfs fsck "-blockId" option for over-replicated blocks

steps:steps:        

• Crate a directory and put multple files in it  
•  Change the replication factor for the file frequently and append data to files.  
•  Make DN down/up and append data to files.  
•  Check the -blocks and -location of the file with fsck ,it will display over replicated blocks   - If you check the "hdfs fsck -blockId" ,then it will display number of expected replica,number of live replica but number of excess replica  will not be updated ,always display as zero which is wrong behavior