Called to draw the current frame and call back from java layer of get width and height from java layer void JNICALL Java_com_greenline_OpenGL2JNILib_basicSetup(JNIEnv * env, This issue happens once the line started to render but once line ends then it's continuously rendering after that there is no issue. I am rendering two lines simultaneously and also continuously using OpenGL ES 2.0 (NDK and C++ language) but randomly displaying unexpected lines(Attached screenshots).