wikidoc:Troubleshooting
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This page is (hopefully) the beginning of a page to help resolve various technical difficulties with accessing or editing Wikidoc Pages.
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Cache problems with Internet Explorer
A problem commonly reported by Microsoft Internet Explorer users relates to Wikipedia content that seems to be out-of-date. The problem usually manifests as disappearing page edits or days-old current events. This problem is almost always caused by browser caching. Almost all Web browsers temporarily store a copy of viewed Web pages on the user's computer, and almost all browsers are configured by default to display the cached copy if the user revisits the same page and it can be determined that the page has not been updated since his last visit. Usually, this process works as expected; however, some versions of Internet Explorer fail to always correctly re-download a page when it has become outdated (which may be a software bug).
(The Internet Explorer problem is not unique to Wikipedia; if you incorrectly see cached data here, you are likely seeing out-of-date pages on other sites too.)
There are three simple workarounds you should try if you encounter this problem.
- Click the Refresh button in the toolbar or activate the Refresh keyboard shortcut (on Microsoft Windows computers, either F5 or Ctrl-R).
- If that doesn't work, try Ctrl-F5 (i.e. hold down the Control key and then press F5); this shortcut is documented as always refreshing the page from the Internet, regardless of what is in the cache.
- If neither method of refreshing works, you can manually delete all files in your cache. To do this, select "Internet Options" from the Internet Explorer "Tools" menu and then click the "Delete Files..." button. (Note that this last process may take some time if the cache has not been recently cleared.)
Finally, you might simply consider trying a different Web browser. Mozilla Firefox, Netscape Navigator, and Opera are three popular alternatives available for a variety of operating systems.
Internet Explorer has been singled out in this troubleshooting section because the majority of cache-related problems are reported by Internet Explorer users, but similar issues could be found in other browsers in the future (commonly, Netscape 7.2 has this problem).
Firewall / Privacy Issues
Symptoms: Images don't show up correctly, or the 'Wikidoc' logo graphic appears instead of referenced images; log-in does not 'stick', and the user's ip keeps appearing at the top right of pages instead of the user name.
Apparently, Wikidoc must make use of some more advanced cookie features. Make sure that any Firewall or Privacy settings (e.g., ZoneAlarm, IE privacy settings, etc.) let Wikidoc have more freedom to set cookies as it desires; in particular, for ZoneAlarm settings, you must allow cookies with private header information.
Too-Many Connections Problem
Symptoms: Some contributors occasionally see error messages like the following instead of the page they requested:
Warning: open(/tmp/sess_e3b9b5e8f5afa9cce2aa0066fca4a143, O_RDWR) failed: Too many open files in system (23) in /usr/local/apache/htdocs/w/wiki.phtml on line 7
Warning: Failed opening 'Setup.php' for inclusion (include_path='.:/usr/local/lib/php') in /usr/local/apache/htdocs/w/wiki.phtml on line 12
Fatal error: Undefined class name 'outputpage' in /usr/local/apache/htdocs/w/wiki.phtml on line 14
Warning: open(/tmp/sess_e3b9b5e8f5afa9cce2aa0066fca4a143, O_RDWR) failed: Too many open files in system (23) in Unknown on line 0
Warning: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
This is caused by the existence of a limit on the number of files which can be open at once, and at times too many users have been connected at once (essentially, this is Wikidoc becoming a victim of its own success). The limit has recently been increased to avoid this error occurring so frequently. However, some people's systems may have cached versions of the error message and so be continually redisplaying it; see "Cache Problems with IE" above.
Firefox doesn't display images
The Mozilla Firefox browser allows you to control whether Web pages can load images from outside the Web site you are viewing. Solution:
- Tools - Options - Web Features (or Content in Firefox 1.5)
- Set the "Load Images" checkbox
- Clear the "for the originating web site only" checkbox
Alternatively, if you still wish to have this option on for other websites, you can leave the "for the originating web site only" checkbox checked, click Exceptions, and then add www.clinicaltrialresults.org/files/mediawiki/en to the allow list.
History problems
Occasionally as of late, viewing the history of an article that was edited when the system was very busy shows that several of the most-recent edits aren't listed any more. If that happens, selecting either a different history length (e.g. "last 20" instead of the default 50) will cause the correct history to be shown. It seems to be a caching problem, not some problem with the database.
All information on this page is attributed to Wikipedia and its contributors.
