后台报错: Database not selected yet,系统自动当机..请求帮助
数据库采用informix , 应用服务 采用websphere6.1(正版) ，jdk5.0 , 每天都会当机N次， 然后重启应用后过了一会还会当机，不知道什么原因？？？ 换了tomcat6.0 也是一样, 不知道怎么解决？？？ 以下是报错的情况：  
（请高手帮忙，看看怎么解决，小弟先谢了！！！必有重谢， 小弟QQ: 15159909 ） 

[09-6-4 13:20:01:848 GMT] 0000002e SystemOut O hql=select distinct pb.id, pb.projectType, pb.projName, pb.loanLimitForm, pb.projLoanLimit, pb.projLoanLimitBal, pb.status, pb.appstat ,ci.name from CoopProjBaseInfo pb, CustomerInfo ci where pb.custcd = ci.id and ci.custType = '2' and pb.projName like ? and pb.brcode = '0013' and pb.status = '0' and pb.appstat = '0' and not exists (select po.projectno from CoopProjApply po where po.projectno = pb.projectno and po.status = '0') 
[09-6-4 13:20:03:466 GMT] 0000002e SystemOut O org.hibernate.util.JDBCExceptionReporter 2009-06-04 13:20:03,466 -- WARN -- SQL Error: -349, SQLState: IX000 
[09-6-4 13:20:03:466 GMT] 0000002e SystemOut O org.hibernate.util.JDBCExceptionReporter 2009-06-04 13:20:03,466 -- WARN -- SQL Error: -349, SQLState: IX000 
[09-6-4 13:20:03:466 GMT] 0000002e SystemOut O org.hibernate.util.JDBCExceptionReporter 2009-06-04 13:20:03,466 -- ERROR -- Database not selected yet. 
[09-6-4 13:20:03:466 GMT] 0000002e SystemOut O org.hibernate.util.JDBCExceptionReporter 2009-06-04 13:20:03,466 -- ERROR -- Database not selected yet. 
[09-6-4 13:20:03:479 GMT] 0000002e SystemOut O org.hibernate.event.def.DefaultLoadEventListener 2009-06-04 13:20:03,467 -- INFO -- Error performing load command 
org.hibernate.exception.GenericJDBCException: could not load an entity: [com.huateng.ebank.entity.data.Loaninfo#gd200906030068] 
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:91) 
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:79) 
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) 
at org.hibernate.loader.Loader.loadEntity(Loader.java:1799) 
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:93) 
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:81) 
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2730) 
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365) 
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346) 
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123) 
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:161) 
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87) 
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:869) 
at org.hibernate.impl.SessionImpl.load(SessionImpl.java:788) 
at org.hibernate.impl.SessionImpl.load(SessionImpl.java:781) 
at org.springframework.orm.hibernate3.HibernateTemplate$3.doInHibernate(HibernateTemplate.java:490) 
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) 
at org.springframework.orm.hibernate3.HibernateTemplate.load(HibernateTemplate.java:484) 
at org.springframework.orm.hibernate3.HibernateTemplate.load(HibernateTemplate.java:478) 
at com.huateng.ebank.entity.dao.LoaninfoDAO.query(LoaninfoDAO.java:53) 
at com.huateng.ebank.business.loanapply.LoanApplyService.getBasicInfo(LoanApplyService.java:2451) 
at com.h