diff --git a/bundle/git.vim/README.md b/bundle/git.vim/README.md
index 281aba1fb..0f86a2b90 100644
--- a/bundle/git.vim/README.md
+++ b/bundle/git.vim/README.md
@@ -4,7 +4,7 @@
 
 Use git in SpaceVim
 
-
+This plugin adds extensive support for [git](https://git-scm.com/). 
 
 <!-- vim-markdown-toc GFM -->
 
diff --git a/bundle/gtags.vim/autoload/ctags.vim b/bundle/gtags.vim/autoload/ctags.vim
index e0bf53b5d..0305452f9 100644
--- a/bundle/gtags.vim/autoload/ctags.vim
+++ b/bundle/gtags.vim/autoload/ctags.vim
@@ -16,7 +16,7 @@ endif
 let s:LOGGER =SpaceVim#logger#derive('ctags')
 
 if !exists('g:gtags_ctags_bin')
-    let g:gtags_ctags_bin = 'ctags'
+  let g:gtags_ctags_bin = 'ctags'
 endif
 
 if !executable(g:gtags_ctags_bin)
@@ -43,6 +43,8 @@ endfunction
 function! s:version_exit(id, data, event) abort
   if a:data ==# 0
     let s:version_checked = 1
+    call s:LOGGER.info('ctags version checking done:')
+    call s:LOGGER.info('      ctags bin:' . g:gtags_ctags_bin)
     call ctags#update()
   endif
 endfunction
@@ -51,8 +53,8 @@ endfunction
 function! ctags#update(...) abort
   if !s:version_checked
     call s:JOB.start([g:gtags_ctags_bin, '--version'], {
-          \ 'on_stdout': funcref('s:version_std_out'),
-          \ 'on_exit': funcref('s:version_exit'),
+          \ 'on_stdout': function('s:version_std_out'),
+          \ 'on_exit': function('s:version_exit'),
           \ })
     return
   endif
@@ -65,17 +67,46 @@ function! ctags#update(...) abort
     let cmd += ['-G']
   endif
   if !isdirectory(dir)
-    call mkdir(dir, 'p')
+    if !mkdir(dir, 'p')
+      call s:LOGGER.warn('failed to create data databases dir:' . dir)
+    endif
   endif
   if isdirectory(dir)
     let cmd += ['-R', '-o', dir . '/tags', project_root]
-    call s:JOB.start(cmd, {'on_exit' : funcref('s:on_update_exit')})
+    call s:LOGGER.debug('ctags command:' . string(cmd))
+    let jobid = s:JOB.start(cmd, {
+          \ 'on_stdout' : function('s:on_update_stdout'),
+          \ 'on_stderr' : function('s:on_update_stderr'),
+          \ 'on_exit' : function('s:on_update_exit')
+          \ })
+    if jobid <= 0
+      call s:LOGGER.debug('failed to start ctags job, return jobid:' . jobid)
+    endif
   endif
 endfunction
 
-function! s:on_update_exit(...) abort
-  if str2nr(a:2) > 0
-    call s:LOGGER.warn('failed to update gtags, exit data: ' . a:2)
+function! s:on_update_stdout(id, data, event) abort
+  for line in a:data
+    call s:LOGGER.debug('stdout' . line)
+  endfor
+endfunction
+
+function! s:on_update_stderr(id, data, event) abort
+  for line in a:data
+    call s:LOGGER.debug('stderr' . line)
+  endfor
+endfunction
+
+function! s:on_update_exit(id, data, event) abort
+  " @bug on exit function is not called when failed
+  " C:\Users\wsdjeg\.SpaceVim>C:\Users\wsdjeg\.SpaceVim\bundle\phpcomplete.vim\bin\ctags.exe -R -o C:/Users/wsdjeg/.cache/SpaceVim/tags/C__Users_wsd
+  " jeg__SpaceVim_/tags C:\Users\wsdjeg\.SpaceVim
+  "
+  " C:\Users\wsdjeg\.SpaceVim>echo %ERRORLEVEL%
+  " -1073741819
+  " https://github.com/neovim/neovim/issues/20856
+  if a:data != 0
+    call s:LOGGER.warn('failed to update gtags, exit data: ' . a:data)
   else
     call s:LOGGER.info('ctags database updated successfully')
   endif
diff --git a/bundle/gtags.vim/autoload/gtags.vim b/bundle/gtags.vim/autoload/gtags.vim
index bad10dcb7..7ad81cc53 100644
--- a/bundle/gtags.vim/autoload/gtags.vim
+++ b/bundle/gtags.vim/autoload/gtags.vim
@@ -477,9 +477,9 @@ function! gtags#update(single_update) abort
   call s:JOB.start(cmd, {'on_exit' : funcref('s:on_update_exit')})
 endfunction
 
-function! s:on_update_exit(...) abort
-  if str2nr(a:2) > 0 && !g:gtags_silent
-    call s:LOGGER.warn('failed to update gtags, exit data: ' . a:2)
+function! s:on_update_exit(id, data, event) abort
+  if a:data > 0 && !g:gtags_silent
+    call s:LOGGER.warn('failed to update gtags, exit data: ' . a:data)
   endif
 endfunction