昨天晚上jsp程序，经过多用户，长时间测试，tomcat返回日志如下：请大家帮忙解答（送45分）

sunny_sunny_sunny200 2008-11-18 11:05:22

警告: 【任意时间段报表==productReportData()】java.sql.SQLException: Cannot get Connection pool!cause by: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object
2008-11-17 23:05:47 cn.com.withub.reportdetail.Report_Csxajqktjb_Cbbm productReportData

2008-11-17 9:59:22 org.apache.catalina.session.StandardSession writeObject
警告: Cannot serialize session attribute TableFormPool for session 713E7F5CD3B110DF4923E2FD39E67B90
java.io.NotSerializableException: withub.com.list.TableForm
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at java.util.HashMap.writeObject(HashMap.java:1001)
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:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1515)
at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:959)
at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:517)
at org.apache.catalina.session.StandardManager.unload(StandardManager.java:463)
at org.apache.catalina.session.StandardManager.stop(StandardManager.java:667)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4512)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3093)
at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:404)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1309)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Thread.java:619)
2008-11-17 9:59:22 org.apache.catalina.session.StandardSession writeObject
警告: Cannot serialize session attribute TableFormPool for session FC08BF4B5619BACA02997F0391383D84
java.io.NotSerializableException: withub.com.list.TableForm
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at java.util.HashMap.writeObject(HashMap.java:1001)
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:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1515)
at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:959)
at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:517)
at org.apache.catalina.session.StandardManager.unload(StandardManager.java:463)
at org.apache.catalina.session.StandardManager.stop(StandardManager.java:667)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4512)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3093)
at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:404)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1309)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Thread.java:619)

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