Runtime.exec() not working on Tomcat

[122jxgcn <yw...@gmail.com>]

I have following code on my Apache Tika Maven project.

This code works when I test locally, but fails when it's attached as
external jar in Apache Solr (container is Tomcat).

String cmd; contains command string that will convert file with input as

./convert.bin input.custom output.xml

I checked that convert.bin and input.custom exists.


String cmd; // As explained above
File out = new File(dir_path, output.xml); // dir_path is file path

Process ps = null;

try {
    ps = Runtime.getRuntime().exec(cmd); // execute command
    int exitVal = ps.waitFor();
    logger.info("Executing Runtime successful with exit value of " +
exitVal); 
    // exitVal is 0
} catch (Exception e) {
    logger.error("Exception in executing Runtime: " + e); // not reaching
here
}

// I get "Out file does not exist", although I should get the proper output   
if (out.exists()) logger.info("Out file exists]");
else logger.info("Out file does not exist]"); // reaches here

out.setWritable(true);
out.setReadable(true);
out.setExecutable(true);
out.deleteOnExit();

// I get FileNotFoundException here
InputStream xml_stream = new FileInputStream(out);


I'm really confused because I get the right result locally (Maven test), but
not when it is on Tomcat.

Any help please?



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Re: Runtime.exec() not working on Tomcat

[Alexandre Rafalovitch <ar...@gmail.com>]

Could it be different 'current' working directories? What happens if
you hardcode the full path into the command and input/output files?

./convert.bin -> /Dev/Solr/bin/convert.bin, etc.

Also, you may want to use some file system observation tools to figure
out exactly what file is touched where. Look for dtrace on Unix-like
systems and for SysInternals ProcMon on Windows.

Regards,
   Alex.
Personal blog: http://blog.outerthoughts.com/
LinkedIn: http://www.linkedin.com/in/alexandrerafalovitch
- Time is the quality of nature that keeps events from happening all
at once. Lately, it doesn't seem to be working.  (Anonymous  - via GTD
book)


On Wed, Aug 22, 2012 at 7:18 AM, 122jxgcn <yw...@gmail.com> wrote:
> I have following code on my Apache Tika Maven project.
>
> This code works when I test locally, but fails when it's attached as
> external jar in Apache Solr (container is Tomcat).
>
> String cmd; contains command string that will convert file with input as
>
> ./convert.bin input.custom output.xml