jvpp: use (*env)->ExceptionClear before calling (*env)->ExceptionOccurred

Change-Id: I6cca455ead986cb8a507c84957a97a40b733b16c
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

diff --git a/src/vpp-api/java/jvpp/gen/jvppgen/jvpp_c_gen.py b/src/vpp-api/java/jvpp/gen/jvppgen/jvpp_c_gen.py
index 7e59cc4..8761eb1 100644 (file)
--- a/src/vpp-api/java/jvpp/gen/jvppgen/jvpp_c_gen.py
+++ b/src/vpp-api/java/jvpp/gen/jvppgen/jvpp_c_gen.py
@@ -227,10 +227,13 @@ static void vl_api_${handler_name}_t_handler (vl_api_${handler_name}_t * mp)
     ${plugin_name}_main_t *plugin_main = &${plugin_name}_main;
     JNIEnv *env = jvpp_main.jenv;
     jthrowable exc;
-
     $err_handler
 
     jmethodID constructor = (*env)->GetMethodID(env, ${class_ref_name}Class, "<init>", "()V");
+
+    // User does not have to provide callbacks for all VPP messages.
+    // We are ignoring messages that are not supported by user.
+    (*env)->ExceptionClear(env); // just in case exception occurred in different place and was not properly cleared
     jmethodID callbackMethod = (*env)->GetMethodID(env, plugin_main->callbackClass, "on${dto_name}", "(Lio/fd/vpp/jvpp/${plugin_name}/dto/${dto_name};)V");
     exc = (*env)->ExceptionOccurred(env);
     if (exc) {