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From "Marichi Gupta (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TIKA-2908) TikaException: Failed to close temporary resource - how to fix?
Date Wed, 17 Jul 2019 20:35:00 GMT
Marichi Gupta created TIKA-2908:

             Summary: TikaException: Failed to close temporary resource - how to fix?
                 Key: TIKA-2908
                 URL: https://issues.apache.org/jira/browse/TIKA-2908
             Project: Tika
          Issue Type: Bug
          Components: ocr, parser
    Affects Versions: 1.21
            Reporter: Marichi Gupta

I am using Apache Tika on Windows 10, jre 1.8.0_181, and I've imported Tika using Maven with
the following dependencies:

{{<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId>
<version>3.8.1</version> <scope>test</scope> </dependency> <dependency>
<groupId>org.apache.tika</groupId> <artifactId>tika-parsers</artifactId>
<version>1.21</version> </dependency> </dependencies>}}

I have the code below for performing OCR using Tesseract (which I have independently tested
and know to be working):

{{public static void OCRTest() { }}

{{try { }}

{{BufferedImage im = ImageIO.read(new File(OCR_IMAGE)); }}

{{TesseractOCRConfig config = new TesseractOCRConfig();}}

{{ config.setTessdataPath("C:\\Program Files\\Tesseract-OCR\\tessdata");}}

{{ config.setTesseractPath("C:\\Program Files\\Tesseract-OCR"); }}

{{ParseContext parseContext = new ParseContext();}}

{{ parseContext.set(TesseractOCRConfig.class, config); }}

{{TesseractOCRParser parser = new TesseractOCRParser(); }}

{{BodyContentHandler handler = new BodyContentHandler(); }}

{{Metadata metadata = new Metadata(); }}

{{try { }}

{{parser.parse(im, handler, metadata, parseContext);}}

{{ System.out.println(handler.toString()); }}

{{} catch (SAXException e) { e.printStackTrace(); } }}

{{catch (TikaException e) { e.printStackTrace(); } }}

{{} }}{{catch (IOException e) { e.printStackTrace(); } }}}

I run into the following exception:

{{org.apache.tika.exception.TikaException: Failed to close temporary resources at org.apache.tika.io.TemporaryResources.dispose(TemporaryResources.java:174)
at org.apache.tika.parser.ocr.TesseractOCRParser.parse(TesseractOCRParser.java:251) at test.test.App.OCRTest(App.java:46)
at test.test.App.main(App.java:30) Caused by: java.nio.file.FileSystemException: C:\Users\m\AppData\Local\Temp\apache-tika-2643805894084124300.tmp:
The process cannot access the file because it is being used by another process. }}

The tmp file is present in the Temp folder. I have the source code downloaded and have stepped
through it with the debugger - the error comes from attempting to close the tmp file. On the
Apache Tika forums, there is another post here (https://issues.apache.org/jira/browse/TIKA-1732) where
someone else has run into the same exception, although with the AutoDetectParser and not Tesseract.
Their issue seemed to be a conflict in their imported jars, but I run into this issue even
with only the Apache Tika libraries installed. I have a feeling this is a concurrency issue,
but I can't pinpoint the conflict.

I don't run into this issue when using the Tika's AutoDetectParser, only with the TesseractOCRParser.
This is an important part of an application I'm working on, so I would really appreciate any
insights on how to proceed.

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