java.lang.IllegalArgumentException: The supplied POIFSFileSystem does not contain a BIFF8 'Workbook' entry. Is it really an excel file? Had: []

apache.org | 1 month ago
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    POI regression testing report

    apache.org | 1 month ago
    java.lang.IllegalArgumentException: The supplied POIFSFileSystem does not contain a BIFF8 'Workbook' entry. Is it really an excel file? Had: [Ole, CompObj, 1Table, SummaryInformation, WordDocument, Data, DocumentSummaryInformation, ObjectPool]

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    Root Cause Analysis

    1. java.lang.IllegalArgumentException

      The supplied POIFSFileSystem does not contain a BIFF8 'Workbook' entry. Is it really an excel file? Had: []

      at o.a.p.hssf.usermodel.HSSFWorkbook.getWorkbookDirEntryName()
    2. o.a.p
      HSSFWorkbook.getWorkbookDirEntryName
      1. o.a.p.hssf.usermodel.HSSFWorkbook.getWorkbookDirEntryName(HSSFWorkbook.java:290)
      1 frame