mikiobraun
commented
10 years ago Hi m0nzderr,
Very strange indeed. What OS / CPU combination are you using?
-M
On Mon, Apr 14, 2014 at 6:51 AM, m0nzderr notifications@github.com wrote:
It all was quite perfect, until I finally tried to assemble my web-app that uses jblas at the backend. Unable to find a solution, and even debug, I'm asking for your help guys.
That's a dummy example that goes very ugly:
@Path("/myservice") public class DummyService { @GET
@GET @Path("test1") public String test1() { final DoubleMatrix X=new DoubleMatrix(5,2,new double[]{1,2,3,4,5,6,7,8,9,10}); final DoubleMatrix Q= X.dup(); return Q.toString(); } @Path("test2") public String test2() { final DoubleMatrix X=new DoubleMatrix(5,2,new double[]{1,2,3,4,5,6,7,8,9,10}); try{ final DoubleMatrix Q= Decompose.qr(X).q; // this line is never reacher return Q.toString(); }catch(Throwable e){ // exception is never thrown return "oops"; } }}
So, first, I do GET http://myhost/myservice/test1, and it works just as expected (I could see "[1,5;2,6;...]" in my browser. Than I do GET http://myhost/myservice/test2 and just nothing happens. No response (browser is eternally waiting), no error in Java console, no exception - nada.
Than I tried to debug, and found out that everything just literally goes away at the native call to dgeqrf here:
public static void geqrf(DoubleMatrix A, DoubleMatrix tau) { int info = NativeBlas.dgeqrf(A.rows, A.columns, A.data, 0, A.rows, tau.data, 0); checkInfo("GEQRF", info); }
I mean, literally dies - control point never reaches the statement "checkInfo("GEQRF", info)", no exceptions thrown. JVM stays up, since other services work fine, including calls to test1 work fine.
Of course, I tried to run the same test "off-line" (not within the server context) and it all works just fine.
In this example I used a very light-weighted standalone jersey-grizzly2 server, that is launched directly via "void main()", just as any other command-line java app.
Since test1() is able to perform a native call to JavaBlas.rcopy with success, I suspect that the problem with calling dgeqrf in test2() has something to do with a threading context. Since I'm unable even get an error code, I could only guess what it is (something like "MTA vs STA"?).
Any clues are appreciated!
Later I'll try to create a maven project with a running example.
— Reply to this email directly or view it on GitHubhttps://github.com/mikiobraun/jblas/issues/44 .
Mikio Braun - http://blog.mikiobraun.de, http://twitter.com/mikiobraun
m0nzderr
It all was quite perfect, until I finally tried to assemble my web-app that uses jblas at the backend. Unable to find a solution, and even debug, I'm asking for your help guys.
That's a dummy example that goes very ugly:
So, first, I do GET http://myhost/myservice/test1, and it works just as expected (I could see "[1,5;2,6;...]" in my browser. Than I do GET http://myhost/myservice/test2 and just nothing happens. No response (browser is eternally waiting), no error in Java console, no exception - nada.
Than I tried to debug, and found out that everything just literally goes away at the native call to dgeqrf here:
I mean, literally dies - control point never reaches the statement "checkInfo("GEQRF", info)", no exceptions thrown. JVM stays up, since other services work fine, including calls to test1 work fine.
Of course, I tried to run the same test "off-line" (not within the server context) and it all works just fine.
In this example I used a very light-weighted standalone jersey-grizzly2 server, that is launched directly via "void main()", just as any other command-line java app.
Since test1() is able to perform a native call to JavaBlas.rcopy with success, I suspect that the problem with calling dgeqrf in test2() has something to do with a threading context. Since I'm unable even get an error code, I could only guess what it is (something like "MTA vs STA"?).
Any clues are appreciated!
Later I'll try to create a maven project with a running example.