QC突然不能使用了，JBOSS正常但是老是显示登录失败为什么？
打开登录页面后，输入用户名密码，但是不能登录显示登录失败，错误信息如下：Messages:
Failed to Login;
Failed to check authentication of user 'admin';
Cannot build directory item for key '' in SA Global Struct Dir;
Failed to fill table struct for table null in database qcsiteadmin_db@jdbc:mercury:sqlserver://MICROSOF-F233T:1433(td);
Error establishing socket. Unknown host: MICROSOF-F233T;
Stack Trace:
com.mercury.jdbc.base.BaseSQLException: Error establishing socket. Unknown host: MICROSOF-F233T
at com.mercury.jdbc.base.BaseExceptions.createException(Unknown Source)
at com.mercury.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.mercury.jdbc.sqlserver.tds.TDSConnection.<init>(Unknown Source)
at com.mercury.jdbc.sqlserver.SQLServerImplConnection.open(Unknown Source)
at com.mercury.jdbc.base.BaseConnection.connect(Unknown Source)
at com.mercury.jdbc.base.BaseConnectionStartup.run(Unknown Source)
wrapped in com.mercury.optane.core.CTdException:
at com.mercury.optane.core.db.CTdDriverManager.getConnection(CTdDriverManager.java:81)
at com.mercury.optane.core.db.CConnectionPool.newConnection(CConnectionPool.java:665)
at com.mercury.optane.core.db.CConnectionPool.tryToGetConnection(CConnectionPool.java:491)
at com.mercury.optane.core.db.CConnectionPool.getConnection(CConnectionPool.java:316)
at com.mercury.optane.core.db.CConnectionManager.getNotTransactedConnection(CConnectionManager.java:299)
at com.mercury.optane.core.db.CConnectionManager.getConnection(CConnectionManager.java:264)
at com.mercury.optane.core.db.CDatabaseFieldsInfo.obtainInfo(CDatabaseFieldsInfo.java:135)
wrapped in com.mercury.optane.core.CTdException: Failed to fill table struct for table null in database qcsiteadmin_db@jdbc:mercury:sqlserver://MICROSOF-F233T:1433(td)
at com.mercury.optane.core.db.CDatabaseFieldsInfo.obtainInfo(CDatabaseFieldsInfo.java:157)
at com.mercury.optane.core.db.CDatabaseFieldsInfo.<init>(CDatabaseFieldsInfo.java:77)
at com.mercury.optane.core.db.CAbsTablesStructDirectory.createDirectoryItem(CAbsTablesStructDirectory.java:129)
at com.mercury.optane.core.directory.CAbsDirectory.getDirectoryItem(CAbsDirectory.java:81)
wrapped in com.mercury.optane.core.CTdException: Cannot build directory item for key '' in SA Global Struct Dir
at com.mercury.optane.core.directory.CAbsDirectory.getDirectoryItem(CAbsDirectory.java:87)
at com.mercury.optane.core.db.CAbsTablesStructDirectory.getDatabaseFieldsInfo(CAbsTablesStructDirectory.java:101)
at com.mercury.td.saserver.sautil.CSaDbSchemaProperties.getDatabaseFieldsInfo(CSaDbSchemaProperties.java:114)
at com.mercury.optane.core.db.CAbsDBContext.isComparisonCaseSensitive(CAbsDBContext.java:178)
at com.mercury.optane.core.db.utils.CDbGeneralFunctions.dbLowerComparison(CDbGeneralFunctions.java:381)
at com.mercury.td.saserver.sautil.CSaServerGeneralFunctions.saDbLowerComparison(CSaServerGeneralFunctions.java:424)
at com.mercury.td.saserver.api.logics.CTdUserLogic.authenticateUserAgainstTdDB(CTdUserLogic.java:1053)
wrapped in com.mercury.optane.core.CTdException: Failed to check authentication of user 'admin'
at com.mercury.td.saserver.api.logics.CTdUserLogic.authenticateUserAgainstTdDB(CTdUserLogic.java:1077)
at com.mercury.td.saserver.api.logics.CTdUserLogic.checkUserPassword(CTdUserLogic.java:994)
at com.mercury.td.saserver.api.logics.CSessionLogic.login(CSessionLogic.java:188)
at com.mercury.td.saserver.web.CTdSiteAdminServlet.redirectLogin(CTdSiteAdminServlet.java:275)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.mercury.optane.core.web.CAbsServlet.executeFunction(CAbsServlet.java:554)
wrapped in com.mercury.optane.core.CTdException: Failed to Login
at com.mercury.optane.core.web.CAbsServlet.executeFunction(CAbsServlet.java:560)
at com.mercury.optane.core.web.CAbsServlet.processRequest(CAbsServlet.java:535)
at com.mercury.optane.core.web.CAbsServlet.doPost(CAbsServlet.java:418)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:153)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.valves.FastCommonAccessLogValve.invoke(FastCommonAccessLogValve.java:481)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:534)
在安装好QC以后我在SQL 2000 里添加了个数据库是不是和这个有关系不知道怎么搞了！ 自己搞定了。。。安装完了QC 我更改了计算机的名字和IP地址，JBOSS就连接不到服务器了，因为JBOSS是通过计算机名来连接数据库主机的！
呵呵得到以下结论： 1.大家在安装QC前请把计算机的名称确定，不要随便更改！
2.如果你安装过程中SQL服务器的地址是填写的IP安装完成就不要修改IP地址！
以上都可能导致QC无法连接数据库服务器的原因！
请教：QC启动问题
安装QC的时候选择了域信息，现在域用户密码更改后，QC无法启动了！！请教各位高手如何解决？
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