Question

I am trying to run a program which is executed by running the following batch file:

@echo off

rem Add extra JVM options here

set OPTS=-Xms64m -Xmx256m

rem Build command line arguments

set CMD_LINE_ARGS=%1

if “”%1″”==”””” goto doneStart

shift

:setupArgs

if “”%1″”==”””” goto doneStart

set CMD_LINE_ARGS=%CMD_LINE_ARGS% %1

shift

goto setupArgs

:doneStart

rem Launch the DCS

java %OPTS% -Djava.ext.dirs=lib -Ddcs.war=war/carrot2-dcs.war org.carrot2.dcs.DcsApp

%CMD_LINE_ARGS%

This batch file sets up the program at http://localhost:8080 (I believe it’s a servlet). The program is a cluster engine similar to the one here: http://search.carrot2.org/stable/search. Everything seems to work, but I get the following command prompt output from executing the batch file.

[INFO] Starting DCS…

[INFO] Native LAPACK not available: no nni_lapack in java.library.path

[INFO] Native BLAS not available: no nni_blas in java.library.path

[INFO] DCS started on port: 8080

I managed to find the LAPACK and BLAS libraries online, but how do I add them to java.library.path (and how do I find what java.library.path points to)?

If anyone who’d like to help me needs some additional information or clarification, please let me know. I’m pretty new to java web development.

Answer 1

java.library.path is used by Java to find native libraries (dlls on Windows). You need to download LAPACK and BLAS libraries somewhere (e.g. in C:\path\lapack\lib and C:\path\blas\lib). You then need to set java.library.path appropriately when you call your program. For example:

java %OPTS% -Djava.library.path=C:\path\lapack\lib;C:\path\blas\lib -Djava.ext.dirs=lib -Ddcs.war=war/carrot2-dcs.war org.carrot2.dcs.DcsApp