Tags are not supported on the 'wiki' realm

[Ryan J Ollos]

I've seen this error a few times this evening, and just now when trying to navigate to the FootNoteMacro. After two page refreshes, I no longer saw the error and the page loaded.

2013-06-06 11:48:16,239 Trac[main] WARNING: [184.78.149.240] HTTPInternalError: 500 Trac Error (Tags are not supported on the 'wiki' realm)

Sometimes it is accompanied by a traceback in the logs,

2013-06-06 12:01:15,188 Trac[formatter] ERROR: Macro ListTagged(lucky) failed:
Traceback (most recent call last):
  File "/srv/trac-hacks.org/pve/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 765, in _macro_formatter
    return macro.ensure_inline(macro.process(args))
  File "/srv/trac-hacks.org/pve/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 356, in process
    text = self.processor(text)
  File "/srv/trac-hacks.org/pve/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 343, in _macro_processor
    text)
  File "/srv/trac-hacks.org/pve/lib/python2.6/site-packages/TracTags-0.7dev_r13235-py2.6.egg/tractags/macros.py", line 231, in expand_macro
    results = sorted(query_result, key=lambda r: \
  File "/srv/trac-hacks.org/pve/lib/python2.6/site-packages/TracTags-0.7dev_r13235-py2.6.egg/tractags/api.py", line 210, in query
    providers.add(self._get_provider(realm))
  File "/srv/trac-hacks.org/pve/lib/python2.6/site-packages/TracTags-0.7dev_r13235-py2.6.egg/tractags/api.py", line 380, in _get_provider
    % realm)
InvalidTagRealm: Tags are not supported on the 'wiki' realm

[Steffen Hoffmann]

Since TagsPlugin has a non-thread-safe issue (#10636), this might hit here. This is yet a guess, because rendering of a TagsPlugin macro is involved.

Plan: I'll fix that ASAP, and we'll see, how it goes.

[Jun Omae]

TagSystem._realm_provider_map is rarely empty on multi-thread. At least, we should use it after it is fully initialized.

tractags/api.py

@@ -366 +366 @@
 
     def _populate_provider_map(self):
         if self._realm_provider_map is None:
-            self._realm_provider_map = {}
-            for provider in self.tag_providers:
-                self._realm_provider_map[provider.get_taggable_realm()] = \
-                    provider
+            # use the "map" variable once it is fully initialized
+            map = dict((provider.get_taggable_realm(), provider)
+                       for provider in self.tag_providers)
+            self._realm_provider_map = map
 
     def _get_provider(self, realm):
         self._populate_provider_map()

[Steffen Hoffmann]

Thank you for the idea. I'll test it.

[Steffen Hoffmann]

In 13278:

TagsPlugin: Provide a more thread-safe map of taggable realms, refs #11152.

This change has been kindly contributed by Jun Omae.

[Steffen Hoffmann]

In 13815:

TagsPlugin: Completing preparation for v0.7 release.

Availability of that code as stable, tagged release
closes #2429, #3359, #3610, #3624, #3677, #3754, #3864, #3947, #3983, #4078, #4277, #4503, #4799, #5523, #7787, #7857, #8638, #9057, #9058, #9059, #9060, #9061, #9062, #9063, #9149, #9210, #9521, #9630, #9636, #10032, #10416, #10636, #11096, #11147, #11152, #11274, #11302, #11658 and #11659.

Additionally there are some issues and enhancement requests showing progress,
but known to require more work to resolve them satisfactorily, specifically
refs #2804, #4200, #8747 and #9064.

Thanks to all contributors and followers, that enabled and encouraged a good
portion of this development work.