Stalls and crashes on Trac 1.0.1

[anonymous]

This plugin will not work for me using Trac 1.0.1

I am running it on an Ubuntu 14.04 Server which is running Python 2.7.6 with Graphviz 2.36 installed.

I installed it as an .egg in my environment's plugins folder using the latest ZIP download (changeset 13847).

When I load the page in the admin panel it loads the "Actions" buttons, "Columns" checkboxes, and the save/cancel/restore/text buttons, but nothing loads for the actual workflow table, and the workflow diagram just says "Updating..." but never loads either.

If I try clicking either of the "Save changes", "Cancel", "Restore initial state", or "Text mode" buttons it also causes an internal error in Trac with the following Traceback:

File "/usr/local/lib/python2.7/dist-packages/trac/web/main.py", line 497, in _dispatch_request
  dispatcher.dispatch(req)
File "/usr/local/lib/python2.7/dist-packages/trac/web/main.py", line 214, in dispatch
  resp = chosen_handler.process_request(req)
File "/usr/local/lib/python2.7/dist-packages/trac/admin/web_ui.py", line 125, in process_request
  path_info)
File "build/bdist.linux-x86_64/egg/tracworkflowadmin/web_ui.py", line 136, in render_admin_panel
  self._parse_request(req)
File "build/bdist.linux-x86_64/egg/tracworkflowadmin/web_ui.py", line 672, in _parse_request
  params = json.loads(req.args.get('params'))
File "/usr/lib/python2.7/json/__init__.py", line 338, in loads
  return _default_decoder.decode(s)
File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
  obj, end = self.raw_decode(s, idx=_w(s, 0).end())

Inspecting the req.args.get('params') value shows that it is None which is what's causing that specific error.

I have quite a few plugins installed, but the only ones that effect workflow, tables, or use Graphviz are:

​AdvancedTicketWorkflowPlugin	0.11dev
​Table-Sorter-Plugin	1.0
​trac-WorkflowActionButtons	0.2
​TracMindMapMacro	0.4

I do also have a fairly large workflow I am using:

[ticket-workflow]
accept = new,assigned,accepted,reopened,needs_info,reviewing,in_progress -> accepted
accept.operations = set_owner_to_self
accept.permissions = TICKET_MODIFY
failed = testing -> in_progress
failed.name = failed testing
failed.permissions = TICKET_MODIFY
in_progress = new,assigned,accepted,reopened,needs_info,reviewing -> in_progress
in_progress.name = in progress
in_progress.permissions = TICKET_MODIFY
leave = * -> *
leave.default = 1
leave.operations = leave_status
needs_info = new,assigned,accepted,reopened,reviewing,in_progress -> needs_info
needs_info.name = needs additional information
needs_info.permissions = TICKET_MODIFY
passed = testing -> closed
passed.name = passes testing
passed.operations = set_resolution
passed.permissions = TICKET_MODIFY
passed.set_resolution = fixed
reassign = new,assigned,accepted,reopened -> assigned
reassign.operations = set_owner
reassign.permissions = TICKET_MODIFY
reassign_in_progress = in_progress -> *
reassign_in_progress.name = reassign to
reassign_in_progress.operations = set_owner
reassign_in_progress.permissions = TICKET_MODIFY
reassign_needs_info = needs_info -> *
reassign_needs_info.name = reassign to
reassign_needs_info.operations = set_owner
reassign_needs_info.permissions = TICKET_MODIFY
reassign_review = review -> *
reassign_review.name = reassign to
reassign_review.operations = set_owner
reassign_review.permissions = TICKET_MODIFY
reassign_testing = testing -> *
reassign_testing.name = reassign to
reassign_testing.operations = set_owner
reassign_testing.permissions = TICKET_MODIFY
reopen = closed -> reopened
reopen.operations = del_resolution
reopen.permissions = TICKET_CREATE
resolve = new,assigned,accepted,reopened,needs_info,reviewing,in_progress -> closed
resolve.operations = set_resolution
resolve.permissions = TICKET_MODIFY
review = new,assigned,accepted,reopened,needs_info,in_progress,testing -> reviewing
review.name = needs review
review.permissions = TICKET_MODIFY
testing = new,assigned,accepted,reopened,needs_info,reviewing,in_progress -> testing
testing.name = needs testing
testing.permissions = TICKET_MODIFY

There is nothing in the logs at all when the page fails to load, and there is only the traceback when the internal error occurs.

[Jun Omae]

Cannot reproduce it. What of browser are you using?

[anonymous]

I am using Firefox 30.

[Jun Omae]

I'm also using Firefox 30 on Windows. It works for me.

Please check using Console and Network tabs on Web developer in your Firefox.

[anonymous]

I was able to track down the issue. It was actually a jQuery-UI conflict between a few of the other plugins. It only caused a noticeable error on the Workflow Admin page for some reason though.

For now I have disabled the main offending plugin and everything is working fine with this plugin now.

[Jun Omae]

In 13978:

tracworkflowadmin: use bundled jquery-ui in Trac core if Trac 1.0 and later (refs #11823)

[Jun Omae]

Thanks for the feedback. I reproduce now. The jquery-ui conflicts between 1.8.6 in TracWorkflowAdminPlugin and 1.7.2 in MindMapMacro.

Workaround is to add the following to your trac.ini.

[mindmap]
resizable = disabled

Otherwise, it would be fixed to apply the following patch to use bundled jqueryui in Trac core, except it's still broken on Trac 0.12.x.

mindmapmacro/0.11/tracmindmap/macro.py

@@ -15 +15 @@
 from trac.mimeview.api import IHTMLPreviewRenderer
 from trac.util         import md5, to_unicode
 from trac.web.api      import IRequestFilter, IRequestHandler, RequestDone
-from trac.web.chrome   import ITemplateProvider, add_script, add_stylesheet
+from trac.web.chrome   import Chrome, ITemplateProvider, add_script, add_stylesheet
 from trac.web.href     import Href
 from trac.wiki.api     import IWikiMacroProvider, parse_args
 from tracextracturl    import extract_url
@@ -136 +136 @@
         add_script( req, 'mindmap/tools.flashembed-1.0.4.min.js', mimetype='text/javascript' )
         add_script( req, 'mindmap/mindmap.js', mimetype='text/javascript' )
         if self.resizable:
-            add_stylesheet( req, 'mindmap/ui.theme.css', mimetype='text/css' )
-            add_stylesheet( req, 'mindmap/ui.resizable.css', mimetype='text/css' )
-            add_script( req, 'mindmap/ui.core.js', mimetype='text/javascript' )
-            add_script( req, 'mindmap/ui.resizable.js', mimetype='text/javascript' )
+            if hasattr(Chrome, 'add_jquery_ui'):
+                Chrome(self.env).add_jquery_ui(req)
+            else:
+                add_stylesheet( req, 'mindmap/ui.theme.css', mimetype='text/css' )
+                add_stylesheet( req, 'mindmap/ui.resizable.css', mimetype='text/css' )
+                add_script( req, 'mindmap/ui.core.js', mimetype='text/javascript' )
+                add_script( req, 'mindmap/ui.resizable.js', mimetype='text/javascript' )
         return (template, data, content_type)
 

[Ryan J Ollos]

In 15575:

0.5dev: Use bundled jQuery-UI if available

Patch by Jun Omae.

Refs #11823.

[Ryan J Ollos]

It looks like some of the image files needed by jQuery UI are missing, as reported in ​gmessage:trac-users:EqqLfeGcw5c/cF84UBZKBgAJ. After r15575 that shouldn't be an issue for Trac 1.0 and later.

Resizing still raises an error though:

jquery-ui.js:5 Uncaught TypeError: Cannot read property 'width' of undefined