[jira] [Created] (TIKA-3203) MP4Parser temporary files are not deleted from Tomcat temp folder

["Isabelle Giguere (Jira)" <ji...@apache.org>]

Isabelle Giguere created TIKA-3203:
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             Summary: MP4Parser temporary files are not deleted from Tomcat temp folder
                 Key: TIKA-3203
                 URL: https://issues.apache.org/jira/browse/TIKA-3203
             Project: Tika
          Issue Type: Bug
          Components: parser
    Affects Versions: 1.24.1
         Environment: CentOS 7.8
Tomcat webapp
            Reporter: Isabelle Giguere


In our application, Tika is used as part of a Tomcat webapp.  Tomcat sets its temp folder ($CATALINA_HOME/temp) as "java.io.tmpdir".  The MP4Parser creates files in java.io.tmpdir.  

The files created by the MP4Parser are never deleted from temp/.  Ex: MediaDataBox10544109451805035303org.mp4parser.boxes.iso14496.part12.MediaDataBox@77cb1ee8

Oddly, there are no errors in logs.  Nothing about files that cannot be deleted or not found.

Other processes in our application needs to create other files in temp/, so we can't simply delete everything in that folder.

I assume from TIKA-1040, TIKA-1361, and TIKA-3084 that most file deletion issues in the MP4Parser have been fixed.  This may be a little gremlin in CentOS or in Tomcat ... ?

I have tried using TemporaryResources (i.e.: replace the "TikaInputStream.get" in the code below by TikaInputStream.get(InputStream, TemporaryResources)) to put the parser's temporary files in a folder that we can control, but to no avail.  Tika's MP4Parser "parse" method initializes a new instance of TemporaryResources, so the TemporaryResources that I created is never used.  The default TemporaryResources would use java.io.tmpdir anyways, right?

So, why aren't these files deleted ?

And, while we are on the subject, there should be a way to set a temporary files folder that parsers actually use (and the parser's dependencies).  How can a user-defined TemporaryResources be useful if the parser ignores it ?


Relevant code:

Parser parser = new AutoDetectParser(); // injected by Spring

Path input = ...; // some mp4 audio file
Path output = ...;

final Metadata metadata = new Metadata();

try(InputStream stream = TikaInputStream.get(input, metadata);
    OutputStream outputstream = new FileOutputStream(output.toFile());
    OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputstream, "UTF-8")){

	ParseContext parseContext = new ParseContext();
	
	parser.parse(stream, new BodyContentHandler(outputStreamWriter), metadata, parseContext);
	
	// do something with the metadata and the output
}



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