我的SystemOut日志填充了：
E MTMBuffWrapper storeObject SESN0200E: Caught Exception while trying to serialize.
[7/24/14 17:20:12:253 GMT+05:30] 0000000a WASSession E MTMHashMap handlePropertyHits SESN0202E: Failed to replicate attribute javax.portlet.p.Z7_JH56H4K0KO8C00ACRD944B2042?view
[7/24/14 17:20:12:254 GMT+05:30] 0000000a WASSession E MTMBuffWrapper storeObject SESN0200E: Caught Exception while trying to serialize.
[7/24/14 17:20:12:254 GMT+05:30] 0000000a WASSession E MTMHashMap handlePropertyHits SESN0202E: Failed to replicate attribute javax.portlet.p.Z7_JH56H4K0K8MP90AS8PIGS60432?view
[7/24/14 17:20:12:254 GMT+05:30] 0000000a WASSession E MTMBuffWrapper storeObject SESN0200E: Caught Exception while trying to serialize.
[7/24/14 17:20:12:254 GMT+05:30] 0000000a WASSession E MTMHashMap handlePropertyHits SESN0202E: Failed to replicate attribute javax.portlet.p.Z7_JH56H4K0KO8C00ACRD944B20K1?view
[7/24/14 17:20:12:255 GMT+05:30] 0000000a WASSession E MTMBuffWrapper storeObject SESN0200E: Caught Exception while trying to serialize.
[7/24/14 17:20:12:255 GMT+05:30] 0000000a WASSession E MTMHashMap handlePropertyHits SESN0202E: Failed to replicate attribute javax.portlet.p.Z7_JH56H4K0K8MP90AS8PIGS604J4?view
[7/24/14 17:20:12:255 GMT+05:30] 0000000a WASSession E MTMBuffWrapper storeObject SESN0200E: Caught Exception while trying to serialize.
我无法得到确切的原因，我用Google搜索并发现它是由序列化问题引起的，但我不明白我应该在哪里纠正这个问题。有人可以指出我的错误吗？