By closer look at frustum near and far planes you can see they are set badly
N: Plane[ [ 0.57735026, 0.57735026, 0.57735026 ], 0.0],
F: Plane[ [ -0.57735026, -0.57735026, -0.57735026 ], 1.9999998]],
solution is easy set ortho projection first with correct near/far values and then multiply it with lookat function matrix
pmv.glMatrixMode(PMVMatrix.GL_PROJECTION);
pmv.glLoadIdentity();
pmv.glOrthof(-1.0f, 1.0f, -1.0f, 1.0f, -1.0f, 1.0f);
float dist = (float)Math.sqrt(1 / 3.0f);
pmv.gluLookAt(dist, dist, dist,
0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f);
results in:
N: Plane[ [ -0.57735026, -0.57735026, -0.57735026 ], 1.9999998],
F: Plane[ [ 0.57735026, 0.57735026, 0.57735026 ], 0.0]],