celery: improve fetching of repo_check tasks.

- add refresh link to fail message
- introduce proper timeouts so we don't block forever.

rhodecode/apps/repository/views/repo_checks.py

@@ -78,11 +78,15 b' class RepoChecksView(BaseAppView):'
 
         if task_id and task_id not in ['None']:
             import rhodecode
-            from rhodecode.lib.celerylib.loader import celery_app
+            from rhodecode.lib.celerylib.loader import celery_app, exceptions
             if rhodecode.CELERY_ENABLED:
+                log.debug('celery: checking result for task:%s', task_id)
                 task = celery_app.AsyncResult(task_id)
-                task.get()
-                if task.failed():
+                try:
+                    task.get(timeout=10)
+                except exceptions.TimeoutError:
+                    task = None
+                if task and task.failed():
                     msg = self._log_creation_exception(task.result, repo_name)
                     h.flash(msg, category='error')
                     raise HTTPFound(h.route_path('home'), code=501)

rhodecode/lib/celerylib/loader.py

@@ -28,6 +28,7 b' import logging'
 from celery import Celery
 from celery import signals
 from celery import Task
+from celery import exceptions  # noqa
 from kombu.serialization import register
 from pyramid.threadlocal import get_current_request
 

rhodecode/templates/admin/repos/repo_creating.mako

@@ -41,8 +41,9 b''
   var url = "${h.route_path('repo_creating_check', repo_name=c.repo_name, _query=dict(task_id=c.task_id))}";
   $.ajax({
     url: url,
+    timeout: 60*1000, // sets timeout to 60 seconds
     complete: function(resp) {
-        if (resp.status == 200) {
+        if (resp.status === 200) {
             var jsonResponse = resp.responseJSON;
 
             if (jsonResponse === undefined) {
@@ -61,9 +62,10 b''
             }
         }
         else {
+            var message = _gettext('Fetching repository state failed. Error code: {0} {1}. Try <a href="{2}">refreshing</a> this page.').format(resp.status, resp.statusText, url);
             var payload = {
                 message: {
-                    message: _gettext('Fetching repository state failed. Error code: {0} {1}. Try refreshing this page.').format(resp.status, resp.statusText),
+                    message: message,
                     level: 'error',
                     force: true
                 }