与无法在Tomcat中加载net.sourceforge.jtds.jdbc.Driver相同的错误，但是该解决方案这次不起作用。刚刚在FreeBSD 10服务器上完成了从Tomcat 8.0.9到8.0.12的更新，即使jtds jar位于lib文件夹中，也再次收到该错误。我已经下载了一份新的jtds副本，以防旧版本损坏，并且还重新部署了我的WAR（以防万一）。没变化。显然，可以选择回滚到Tomcat 8.0.9作为解决方法，但是我有一些时间要进行处理，因此最好保持最新的服务器软件……这是我为什么可能再次遇到此错误的想法。以及如何解决？
22-Jul-2014 15:21:17.811 SEVERE [http-nio-443-exec-9] org.apache.catalina.core.StandardWrapperValve.invoke Ser
vlet.service() for servlet [base] in context with path [] threw exception
com.sscorp.base.exception.SystemException: org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC drive
r class 'net.sourceforge.jtds.jdbc.Driver'
at com.sscorp.base.util.DBUtils.query(DBUtils.java:175)
at com.sscorp.base.util.DBUtils.query(DBUtils.java:158)
at com.sscorp.base.util.DBUtils.findEntitiesBy(DBUtils.java:324)
at com.sscorp.base.util.DBUtils.findEntityBy(DBUtils.java:315)
at com.sscorp.base.dao.common.UserDAO.findByUsernameAndPassword(UserDAO.java:50)
at com.sscorp.base.web.AuthenticationFilter.doFilter(AuthenticationFilter.java:56)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:2
22)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'net.sourceforge.jtds.jdb
c.Driver'
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1136)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
at org.apache.commons.dbutils.QueryRunner.prepareConnection(QueryRunner.java:334)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:483)
at com.sscorp.base.util.DBUtils.query(DBUtils.java:172)
... 24 more
Caused by: java.lang.ClassNotFoundException: net.sourceforge.jtds.jdbc.Driver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1324)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1177)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:259)
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1130)
... 28 more
经过几天的运气，随后又发布了一些软件更新。应用了它们（甚至没有重新启动，因为它们不是服务/已缓存），并且现在可以神奇地工作了。似乎无关，它是curl和python进行了更新。
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我来说两句