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From "Tim Allison (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (TIKA-2874) Parsing of 4 mb excel file generates 164 mb worth of words
Date Wed, 15 May 2019 12:44:00 GMT

    [ https://issues.apache.org/jira/browse/TIKA-2874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16840365#comment-16840365
] 

Tim Allison edited comment on TIKA-2874 at 5/15/19 12:43 PM:
-------------------------------------------------------------

Well, that's exciting! :P  

When you decompress the zip file, the first sheet is 100MB.

When I look at the shared strings file, I see: {{count="331360" uniqueCount="143"}} so, yeah,
there's a lot of duplicated data, but this isn't a Tika problem...I don't think.  The issue
is that you can't actually see this easily in Excel.


was (Author: tallison@mitre.org):
Well, that's exciting! :P  

When you decompress the zip file, the first sheet is 100MB.

When you look at the shared strings file, I see: {{count="331360" uniqueCount="143"}} so,
yeah, there's a lot of duplicated data, but this isn't a Tika problem...I don't think.  The
issue is that you can't actually see this easily in Excel.

> Parsing of 4 mb excel file generates 164 mb worth of words
> ----------------------------------------------------------
>
>                 Key: TIKA-2874
>                 URL: https://issues.apache.org/jira/browse/TIKA-2874
>             Project: Tika
>          Issue Type: Bug
>          Components: parser
>    Affects Versions: 1.20, 1.19.1
>            Reporter: Sébastien Nussbaumer
>            Priority: Major
>         Attachments: excel_that_generates_huge_number_of_words.xlsx, tika-config.xml
>
>
> When I parse the attached 4 mb excel file, I get 164 mb worth of words. When checking
out the words I see that some cells are repeated *many hundred thousand* of times.
> I tried passing the words through the uniq linux command line utility and got a file
with a much more reasonnable size of 16 kb.
> This is the code I use : 
> {code:java}
> TikaConfig config = new TikaConfig(new ClassPathResource("tika-config.xml").getURL());
> Detector detector = config.getDetector();
> Parser autoDetectParser = new AutoDetectParser(config);
> Tika tika = new Tika(detector, autoDetectParser);
> try (LanguageWriter languageWriter = new LanguageWriter(LanguageDetector.getDefaultLanguageDetector().loadModels());
>         OutputStreamWriter outputStreamWriter = new OutputStreamWriter(output, StandardCharsets.UTF_8);
>         CompositeWriter compositeWriter = new CompositeWriter(outputStreamWriter, languageWriter))
{
>     WriteOutContentHandler handler = new WriteOutContentHandler(compositeWriter, indexedChars);
>     ParseContext context = new ParseContext();
>     context.set(Parser.class, tika.getParser());
>     tika.getParser().parse(input, new BodyContentHandler(handler), new Metadata(), context);
> } 
> {code}



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