tomcat不稳定时间长老报这个错麻烦大家给个好的解决方案！
开始正常，运行一段时间tomcat就死掉拉。这是最近的日志大家给我看看有没有好的解决方案啊。

              at   org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:152)
                at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
                at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
                at   org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:137)
                at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
                at   org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:118)
                at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:102)
                at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
                at   org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
                at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
                at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
                at   org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)

                at   org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:16
0)
                at   org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:799)
                at   org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:705)
                at   org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java
:577)
                at   org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:683)
                at   java.lang.Thread.run(Thread.java:595)
select   convert(varchar,a.typeid)   str_typeid,   a.typename,     (select   convert(varcha
r,count(1))   from   bigclass   b   where   b.typeid   =   a.typeid   and   b.bigclassview=1)   str_
count_bigclass     from   type   a   where   typeview=1   order   by   a.typeorder
java.sql.SQLException:   [Microsoft][SQLServer   2000   Driver   for   JDBC]Unhandled   toke
n   type:   ROW
                at   com.microsoft.jdbc.base.BaseExceptions.createException(Unknown   Source
)