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copied!<p>I solved the problem. The evil is <strong>Win7's File Virtualization</strong> feature. By default, Win7 will enable this feature on several well-known folders, e.g. Windows, Program Files, ProgramData, etc. The effect is that under some conditions, a file will have dual contents and this just happen to occur on my server.xml.</p> <p>The workaround is clean things in '<strong>c:\Users\<user account>\AppData\local\VirtualStore</strong>'. The long-time solution is "Don't install Tomcat in these well-know folders. If you insist, be sure not to install-'n-uninstall too many times."</p> <p><em>~~~ How I find this problem (you may not need to see this) ~~~</em></p> <p>Two words: "Pure luck". When I use some xml editor to edit tomcat-users.xml and add a user 'test'. I restart Tomcat but can't login to use manager UI. I recheck tomcat-users.xml and see that user is indeed set. Even I uninstall-'n-install different version of Tomcat, login still fails.</p> <p>Then I use notepad to edit tomcat-users.xml and I'm astonished to see it's the original version Tomcat has installed. After editing it with notepad and restart Tomcat, I can login now.</p> <p>Very quickly, my thoughts flashes to server.xml and I use notepad to see it. Ah Ha! There's no <em>URIEncoding</em> attrbutes in connector tag. After fixing it, The problem is solved.</p> <p><em>Eiplog</em></p> <p>In my case, my xml editor and IE both show wrong version, but my other browers and notepad show correct version. I still don't know what algorithm does Win7 uses on File Virtualization, so I think workaround will live for a while.</p>

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