dont hang when empty metadata is passed

1 files changed, 2 insertions, 0 deletions

diff --git a/src/core/lib/security/credentials/plugin/plugin_credentials.c b/src/core/lib/security/credentials/plugin/plugin_credentials.c
index 61c10862da..5d950098a0 100644
--- a/src/core/lib/security/credentials/plugin/plugin_credentials.c
+++ b/src/core/lib/security/credentials/plugin/plugin_credentials.c
@@ -104,6 +104,8 @@ static void plugin_md_request_metadata_ready(void *request,
         grpc_slice_unref(md_array[i].value);
       }
       gpr_free(md_array);
+    } else if (num_md == 0) {
+      r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_OK, NULL);
     }
   }
   gpr_free(r);