Hi Anit,
DiD you try with XLSX uploaded over here ?
dropbox.com/s/0879kn0da6aoqou/CFSI_CMRT3-01%20(2).xls
Also we are facing more issues while reading excel sheets (XLS) -
1.java.lang.NullPointerException at org.apache.poi.hssf.model.LinkTable.getExternalBookAndSheetName
2.Duplicate PageSettingsBlock record (sid=0x89c)
3.The supplied POIFSFileSystem does not contain a BIFF8 'Workbook' entry
Please let me know your findings ?