Hallo,
I have such problem:
We are using WebSphere Portal 5.0. DB2 is used like  datastore.
It works correctly, byt when much users are connecting to portal, exception 
about DB2 are logged into SystemErr.log, like following:

---- Begin backtrace for Nested Throwables
com.ibm.websphere.ce.cm.ObjectClosedException: DSRA9110E: Connection is clos
ed.
        at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.runtimeXIfNotClosed(WS
JdbcConnection.java(Inlined Compiled Code))
        at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.prepareStatement(WSJdb
cConnection.java(Compiled Code))
        at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.prepareStatement(WSJdb
cConnection.java(Compiled Code))
        at com.ibm.wps.datastore.core.DataStoreContext.prepareStatement(Data
StoreContext.java(Inlined Compiled Code))
        at com.ibm.wps.datastore.core.BasePersister.loadDependants(BasePersi
ster.java(Compiled Code))
        at com.ibm.wps.datastore.core.BasePersister.findInternal(BasePersist
er.java(Compiled Code))
        at com.ibm.wps.datastore.core.BasePersister.findInternal(BasePersist
er.java(Inlined Compiled Code))
 

or

---- Begin backtrace for Nested Throwables
com.ibm.websphere.ce.cm.ObjectClosedException: DSRA9110E: ResultSet is close
d.
        at com.ibm.ws.rsadapter.jdbc.WSJdbcResultSet.runtimeXIfNotClosed(WSJ
dbcResultSet.java(Inlined Compiled Code))
        at com.ibm.ws.rsadapter.jdbc.WSJdbcResultSet.next(WSJdbcResultSet.ja
va(Compiled Code))
        at com.ibm.wps.datastore.core.BasePersister.loadDependants(BasePersi
ster.java(Compiled Code))
        at com.ibm.wps.datastore.core.BasePersister.findInternal(BasePersist
er.java(Compiled Code))
        at com.ibm.wps.datastore.core.BasePersister.findInternal(BasePersist
er.java(Inlined Compiled Code))
        at com.ibm.wps.datastore.core.BasePersister.findAllInternal(BasePers
ister.java(Compiled Code))
        at com.ibm.wps.datastore.PortletDescriptorPersister.findAll(PortletD
escriptorPersister.java:54)
        at com.ibm.wps.datastore.PortletDescriptor.findAll(PortletDescriptor
.java:83)
        at java.lang.reflect.Method.invoke(Native Method)

Can you help me, what subject can cause such incorrect state?

Thanks.

Jan

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