Jbo.doconnectionpooling=true

Question

I have a big problem with jbo.doconnectionpooling=true. In JDeveloper 9.0.3.4 (and also 9.0.5.2) when i turn this parameter on for my root application module (AM), then in my web application each request does Activate and Passivate operations on every AM instance usage (even if the AM pool size is sufficient to hold the active instance and jbo.dofailover=false). I dont post any data to database before commit, but between consequtive requests some or all state in BC Java layer (inserted, current rows, changed attribute values) of my VOs with jbo.doconnectionpooling=true are forgotten.
Reason why I need this so critically is that i have 9 separate applications, that each may have up to 1000 concurrent users. To make this configuration most performant, I'd like to have AM pools of 1000 instances. Without jbo.doconnectionpooling=true this would need potentially 9000 open connections to DB, but my service provider doesnt allow more than 1000 (and is complaining already on that). JDBC connection doesnt hold any uncommitted state for my application, so I decided to use jbo.doconnectionpooling=true, but unfortunately it behaves in my opinion not as stated in documentation.
Best Regards!
Mihkel Nõges
AS Cell Network
Estonia

Answer 1

Example BC log:
[537] Diagnostic Properties: Timing:false Functions:false Linecount:true Threshold:6
[538] Column count: 50
[539] ViewObject close prepared statements...
[540] ViewObject : Created new QUERY statement
[541] SELECT OppekavaVer.ID,         OppekavaVer.VERSIOON_NR,         OppekavaVer.OPPEKAVA_ID,          OppekavaVer.NIMETUS,         OppekavaVer.NIMETUS_ENG,          OppekavaVer.KVALIFIKATSIOON_ID,         OppekavaVer.KOGUMAHT,          OppekavaVer.PRAKTIKA_MAHT,         OppekavaVer.MAHU_MOOTYHIK_ID,          OppekavaVer.NOMINAALKESTVUS,         OppekavaVer.EESMARGID,          OppekavaVer.VASTUVOTUTINGIMUSED,         OppekavaVer.OPPETOO_KORRALDUS,          OppekavaVer.PRAKTIKA_VOIMALUSED,         OppekavaVer.ON_OSAKOORMUS,          OppekavaVer.OPPEJOUDUDE_KVALIFIKATSIOON,         OppekavaVer.ISCED_KOOD,          OppekavaVer.ON_ASENDATUD,         OppekavaVer.MUUTM_ARV,          OppekavaVer.MUUTJA,         OppekavaVer.MUUTM_AEG,          OppekavaVer.HARIDUSTASE_ID,         OppekavaVer.OPPEASUTUS_ID,          OppekavaVer.STANDARDID,         OppekavaVer.LOPETAMISE_TINGIMUSED,          OppekavaVer.ISCED_TASE,         OppekavaVer.NIMETUS_OTSING,          OppekavaVer.NOMINAALKESTVUS_KUUD,         Oppekava.ID  AS ID1,         Oppekava.KOOD,         Oppekava.OPPEASUTUS_ID  AS OPPEASUTUS_ID1,         Oppekava.ON_RIIKLIK_OPPEKAVA,          Oppekava.OPPEKAVA_KOOD,         OLEKUD.OKV_STAATUS(OppekavaVer.ID)  AS STAATUS,         Oppeasutus.NIMETUS_SHORT,         Oppeasutus.ID  AS ID2,         OppekavaVer.VASTUVOTU_OLEK,         OppekavaVer.AVAMISE_KUUP,          OppekavaVer.SULGEMISE_KUUP,         (select ms.syndmuse_aeg  from koolitusluba kl inner join menetlus                 m on  kl.ID=m.KOOLITUSLUBA_ID inner join menetlus_syndmus              ms    on   m.ID=ms.MENETLUS_ID and ms.OMISTATUD_OLEK=12570            where    OppekavaVer.OPPEKAVA_ID=kl.OPPEKAVA_ID union     select          ms.syndmuse_aeg     from menetlus m inner  join    menetlus_syndmus           ms on m.ID=ms.MENETLUS_ID      and    ms.OMISTATUD_OLEK=12570       where   OppekavaVer.ID=m.OPPEKAVA_VER_ID     and not exists(select  * from koolitusluba where oppekava_id=OppekavaVer.OPPEKAVA_ID))  AS REGISTREERIMISE_AEG FROM OPPEKAVA_VER OppekavaVer, OPPEKAVA Oppekava, OPPEASUTUS Oppeasutus WHERE OppekavaVer.OPPEKAVA_ID = Oppekava.ID AND OppekavaVer.OPPEASUTUS_ID = Oppeasutus.ID(+) AND (OppekavaVer.OPPEASUTUS_ID=? and OppekavaVer.VERSIOON_NR=(select max(versioon_nr) from oppekava_ver okv2 where okv2.oppekava_id=Oppekava.id)) ORDER BY OppekavaVer.NIMETUS ASC
[542] Binding param 1: 1014
[543] Column count: 9
[544] OracleSQLBuilder Executing Select on: OPPEASUTUS (false)
[545] Built select: 'SELECT ID, NIMETUS, KL_TYYP, REG_NR, KL_OMANDIVORM, NIMETUS_SHORT FROM OPPEASUTUS Oppeasutus'
[546] Executing FAULT-IN...SELECT ID, NIMETUS, KL_TYYP, REG_NR, KL_OMANDIVORM, NIMETUS_SHORT FROM OPPEASUTUS Oppeasutus WHERE ID=:1
[547] Column count: 9
[548] ViewObject close prepared statements...
[549] ViewObject : Created new QUERY statement
[550] SELECT Oppeasutus.ID,         Oppeasutus.NIMETUS,         Oppeasutus.KL_TYYP,         Oppeasutus.KL_OMANDIVORM,         Oppeasutus.REG_NR,         Oppeasutus.NIMETUS_SHORT FROM OPPEASUTUS Oppeasutus WHERE (Oppeasutus.ID = :1) ORDER BY Oppeasutus.NIMETUS
[551] Binding param 1: 1014
[552] DefaultConnectionStrategy is disconnecting an application module connection
[553] Database state was detected while disconnecting the application module's connection
[554] Passivating the application module state.
[555] **PCollManager.resolveName** tabName=PS_TXN
[556] Getting a connection for internal use...
[557]    Creating internal connection...
[558] Trying connection: DataSource='com.evermind.sql.OrionCMTDataSource@1c5'...
[559] <AM MomVer="0">
   <cd/>
   <TXN Def="0" New="0" Lok="2"/>
   <VO>
      <VO ac="0" Def="ehis.ok.da.OppeasutuseNimetus" Name="OppeasutuseNimetus"/>
      <VO It="1" Sz="100" St="0" ac="0" Def="ehis.ok.da.OppekavaVersioonid" Name="OppekavaVersioonidOtsing">
         <Wh>
            <![CDATA[OppekavaVer.OPPEASUTUS_ID=? and OppekavaVer.VERSIOON_NR=(select max(versioon_nr) from oppekava_ver okv2 where okv2.oppekava_id=Oppekava.id)]]>
         </Wh>
         <Or>
            <![CDATA[OppekavaVer.NIMETUS ASC]]>
         </Or>
         <args ct="1">
            <arg>
               <![CDATA[1014]]>
            </arg>
         </args>
         <Key>
            <![CDATA[00030000000433333838000000043333383800000003C20B0F]]>
         </Key>
      </VO>
   </VO>
</AM>
[560] **insert** id=1, parid=-1, collid=38612, keyArr.len=-1, cont.len=970
[561]    stmt: begin insert into "PS_TXN" values (:1, :2, :3, empty_blob(), sysdate) returning content into :4; end;
[562] **commit** #pending ops=1
[563] **insert** id=-1, parid=0, collid=38612, keyArr.len=-1, cont.len=665
[564]    stmt: begin insert into "PS_TXN" values (:1, :2, :3, empty_blob(), sysdate) returning content into :4; end;
[565] **commit** #pending ops=1
[566] OppekavaVersioonidOtsing notify ROLLBACK ...
[567] Clearing VO cache for OppekavaVersioonidOtsing
[568] Clear QueryCollection in cache...
[569] OppeasutuseNimetus notify ROLLBACK ...
[570] Clearing VO cache for OppeasutuseNimetus
[571] Clear QueryCollection in cache...
[572] OppeasutuseNimetus_0_findByKey notify ROLLBACK ...
[573] Clearing VO cache for OppeasutuseNimetus_0_findByKey
[574] Clear QueryCollection in cache...
[575] Clearing EO cache for ehis.ok.bo.OppekavaVer
[576] Clearing VO cache for OppekavaVersioonid
... Lots of Clearing VO caches
[830] Resetting AM=EhakAM
[831] ViewObject close prepared statements...
... Lots of closing prepared statements...
[911] DefaultConnectionStrategy is disconnecting an application module connection
[912] *** closing jdbc connection now **** ([Connection : com.evermind.sql.OrionCMTConnection@224])
[913] Reusing a cached session application module instance
[914] DefaultConnectionStrategy is re-establishing an application module connection
[915] Resetting AM=EhisOkModule
[916] Trying connection: DataSource='com.evermind.sql.OrionCMTDataSource@1c5'...
[917] Successfully logged in
[918] JDBCDriverVersion: 9.2.0.5.0
[919] DatabaseProductName: Oracle
[920] DatabaseProductVersion: Oracle9i Release 9.2.0.4.0 - Production JServer Release 9.2.0.4.0 - Production
[921] Propertymanager: skipping reload of file and system based properties
[922] {{ begin Loading BC4J properties
[923] -----------------------------------------------------------
[924] BC4J Property jbo.default.language='et' -->(MetaObjectManager) from System Default
[925] BC4J Property jbo.default.country='EE' -->(MetaObjectManager) from System Default
[926] BC4J Property DeployPlatform='LOCAL' -->(SessionImpl) from Client Environment
[927] Skipping empty Property ConnectionMode from System Default
[928] Skipping empty Property HostName from System Default
[929] Skipping empty Property ConnectionPort from System Default
[930] BC4J Property jbo.locking.mode='optimistic' -->(MetaObjectManager) from Client Environment
[931] Skipping empty Property ApplicationPath from System Default
[932] BC4J Property AppModuleJndiName='ehis.ok.da.EhisOkModule' -->(SessionImpl) from Client Environment
[933] BC4J Property java.naming.security.principal='37009232731' -->(SessionImpl) from Client Environment
[934] Skipping empty Property java.naming.security.credentials from System Default
[935] Skipping empty Property jbo.user.principal from System Default
[936] Skipping empty Property jbo.object.marshaller from System Default
[937] BC4J Property jbo.use.pers.coll='false' -->(SessionImpl) from System Default
[938] BC4J Property jbo.pers.max.rows.per.node='70' -->(SessionImpl) from System Default
[939] BC4J Property jbo.pers.max.active.nodes='30' -->(SessionImpl) from System Default
[940] Skipping empty Property jbo.pcoll.mgr from System Default
[941] BC4J Property jbo.txn_table_name='PS_TXN' -->(SessionImpl) from System Default
[942] BC4J Property jbo.txn_seq_name='PS_TXN_seq' -->(SessionImpl) from System Default
[943] BC4J Property jbo.control_table_name='PCOLL_CONTROL' -->(MetaObjectManager) from System Default
[944] BC4J Property jbo.stringmanager.factory.class='use_default' -->(SessionImpl) from System Default
[945] BC4J Property jbo.fetch.mode='AS.NEEDED' -->(MetaObjectManager) from System Default
[946] BC4J Property jbo.323.compatible='false' -->(MetaObjectManager) from System Default
[947] Skipping empty Property JBODynamicObjectsPackage from System Default
[948] BC4J Property MetaObjectContextFactory='oracle.jbo.mom.xml.DefaultMomContextFactory' -->(MetaObjectManager) from System Default
[949] BC4J Property jbo.load.components.lazily='false' -->(MetaObjectManager) from System Default
[950] BC4J Property MetaObjectContext='oracle.jbo.mom.xml.XMLContextImpl' -->(MetaObjectManager) from System Default
[951] BC4J Property java.naming.factory.initial='oracle.jbo.common.JboInitialContextFactory' -->(SessionImpl) from Client Environment
[952] BC4J Property IsLazyLoadingTrue='true' -->(MetaObjectManager) from /oracle/jbo/server/jboserver.properties resource
[953] BC4J Property ActivateSharedDataHandle='false' -->(MetaObjectManager) from System Default
[954] Skipping empty Property HandleName from System Default
[955] Skipping empty Property Factory-Substitution-List from System Default
[956] BC4J Property jbo.project='OK_BC4J' -->(Configuration) from Client Environment
[957] BC4J Property jbo.max.cursors='50' -->(MetaObjectManager) from System Default
[958] BC4J Property jbo.dofailover='false' -->(Configuration) from Client Environment
[959] BC4J Property jbo.doconnectionpooling='true' -->(Configuration) from Client Environment
[960] BC4J Property jbo.recyclethreshold='20' -->(Configuration) from Client Environment
[961] BC4J Property jbo.ampool.dynamicjdbccredentials='false' -->(Configuration) from Client Environment
[962] BC4J Property jbo.ampool.resetnontransactionalstate='true' -->(SessionImpl) from System Default
[963] BC4J Property jbo.ampool.sessioncookiefactoryclass='oracle.jbo.http.HttpSessionCookieFactory' -->(Configuration) from Client Environment
[964] BC4J Property jbo.ampool.connectionstrategyclass='oracle.jbo.common.ampool.DefaultConnectionStrategy' -->(Configuration) from System Default
[965] BC4J Property jbo.ampool.maxpoolsize='2147483647' -->(Configuration) from System Default
[966] BC4J Property jbo.ampool.initpoolsize='0' -->(Configuration) from System Default
[967] BC4J Property jbo.ampool.monitorsleepinterval='600000' -->(Configuration) from System Default
[968] BC4J Property jbo.ampool.minavailablesize='10' -->(Configuration) from Client Environment
[969] BC4J Property jbo.ampool.maxavailablesize='50' -->(Configuration) from Client Environment
[970] BC4J Property jbo.ampool.maxinactiveage='600000' -->(Configuration) from System Default
[971] BC4J Property jbo.ampool.doampooling='true' -->(Configuration) from System Default
[972] BC4J Property jbo.passivationstore='null' -->(MetaObjectManager) from System Default
[973] BC4J Property jbo.saveforlater='false' -->(SessionImpl) from System Default
[974] BC4J Property jbo.snapshotstore.undo='persistent' -->(SessionImpl) from System Default
[975] BC4J Property jbo.maxpassivationstacksize='10' -->(SessionImpl) from System Default
[976] BC4J Property jbo.txn.handleafterpostexc='false' -->(SessionImpl) from System Default
[977] BC4J Property jbo.maxpoolcookieage='-1' -->(Configuration) from System Default
[978] BC4J Property PoolClassName='oracle.jbo.common.ampool.ApplicationPoolImpl' -->(Configuration) from System Default
[979] BC4J Property jbo.maxpoolsize='2147483647' -->(Configuration) from System Default
[980] BC4J Property jbo.initpoolsize='0' -->(Configuration) from System Default
[981] BC4J Property jbo.poolrequesttimeout='30000' -->(Configuration) from System Default
[982] BC4J Property jbo.poolmonitorsleepinterval='600000' -->(Configuration) from System Default
[983] BC4J Property jbo.poolminavailablesize='5' -->(Configuration) from System Default
[984] BC4J Property jbo.poolmaxavailablesize='25' -->(Configuration) from System Default
[985] BC4J Property jbo.poolmaxinactiveage='600000' -->(Configuration) from System Default
[986] BC4J Property RELEASE_MODE='Stateful' -->(MetaObjectManager) from System Default
[987] BC4J Property jbo.assoc.consistent='true' -->(MetaObjectManager) from System Default
[988] BC4J Property jbo.viewlink.consistent='false' -->(MetaObjectManager) from /oracle/jbo/server/jboserver.properties resource
[989] BC4J Property jbo.passivation.TrackInsert='true' -->(MetaObjectManager) from System Default
[990] Skipping empty Property jbo.ViewCriteriaAdapter from System Default
[991] BC4J Property jbo.SQLBuilder='Oracle' -->(MetaObjectManager) from /oracle/jbo/server/jboserver.properties resource
[992] BC4J Property jbo.ConnectionPoolManager='oracle.jbo.server.ConnectionPoolManagerImpl' -->(MetaObjectManager) from System Default
[993] BC4J Property jbo.TypeMapEntries='Oracle' -->(MetaObjectManager) from /oracle/jbo/server/jboserver.properties resource
[994] Skipping empty Property jbo.sql92.JdbcDriverClass from System Default
[995] BC4J Property jbo.sql92.LockTrailer='FOR UPDATE' -->(MetaObjectManager) from System Default
[996] BC4J Property jbo.jdbc.trace='false' -->(MetaObjectManager) from System Default
[997] BC4J Property jbo.sql92.DbTimeQuery='select sysdate from dual' -->(MetaObjectManager) from System Default
[998] BC4J Property oracle.jbo.defineColumnLength='as_chars' -->(MetaObjectManager) from System Default
[999] Skipping empty Property jbo.tmpdir from System Default
[1000] Skipping empty Property jbo.server.internal_connection from System Default
[1001] Skipping empty Property SessionClass from System Default
[1002] Skipping empty Property TransactionFactory from System Default
[1003] BC4J Property jbo.debugoutput='file' -->(Diagnostic) from System Property
[1004] BC4J Property jbo.debug.prefix='DBG: ' -->(Diagnostic) from /oracle/jbo/common/Diagnostic.properties resource
[1005] BC4J Property jbo.logging.show.timing='false' -->(Diagnostic) from /oracle/jbo/common/Diagnostic.properties resource
[1006] BC4J Property jbo.logging.show.function='false' -->(Diagnostic) from /oracle/jbo/common/Diagnostic.properties resource
[1007] BC4J Property jbo.logging.show.level='false' -->(Diagnostic) from /oracle/jbo/common/Diagnostic.properties resource
[1008] BC4J Property jbo.logging.show.linecount='true' -->(Diagnostic) from /oracle/jbo/common/Diagnostic.properties resource
[1009] BC4J Property jbo.logging.trace.threshold='6' -->(Diagnostic) from /oracle/jbo/common/Diagnostic.properties resource
[1010] BC4J Property jbo.jdbc.driver.verbose='false' -->(Diagnostic) from System Default
[1011] Skipping empty Property oracle.home from System Default
[1012] Skipping empty Property oc4j.name from System Default
[1013] BC4J Property jbo.ejb.txntimeout='1830' -->(SessionImpl) from System Default
[1014] BC4J Property jbo.ejb.txntype='global' -->(SessionImpl) from System Default
[1015] BC4J Property jbo.ejb.txn.disconnect_on_completion='false' -->(SessionImpl) from System Default
[1016] Skipping empty Property oracle.jbo.schema from System Default
[1017] BC4J Property jbo.xml.validation='false' -->(MetaObjectManager) from System Default
[1018] BC4J Property ord.RetrievePath='ordDeliverMedia' -->(MetaObjectManager) from System Default
[1019] BC4J Property ord.HttpMaxMemory='102400' -->(MetaObjectManager) from System Default
[1020] Skipping empty Property ord.HttpTempDir from System Default
[1021] BC4J Property ord.wmp.classid='clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95' -->(MetaObjectManager) from System Default
[1022] BC4J Property ord.qp.classid='clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B' -->(MetaObjectManager) from System Default
[1023] BC4J Property ord.rp.classid='clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA' -->(MetaObjectManager) from System Default
[1024] BC4J Property ord.wmp.codebase='http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701' -->(MetaObjectManager) from System Default
[1025] BC4J Property ord.qp.codebase='http://www.apple.com/qtactivex/qtplugin.cab' -->(MetaObjectManager) from System Default
[1026] Skipping empty Property ord.rp.codebase from System Default
[1027] BC4J Property ord.wmp.plugins.page='http://www.microsoft.com/isapi/redir.dll?prd=windows&sbp=mediaplayer&ar=Media&sba=Plugin&' -->(MetaObjectManager) from System Default
[1028] BC4J Property ord.qp.plugins.page='http://www.apple.com/quicktime/download/' -->(MetaObjectManager) from System Default
[1029] BC4J Property ord.rp.plugins.page='http://www.real.com/player/' -->(MetaObjectManager) from System Default
[1030] BC4J Property jbo.security.enforce='None' -->(SessionImpl) from System Default
[1031] BC4J Property jbo.security.loginmodule='oracle.security.jazn.tools.Admintool' -->(SessionImpl) from System Default
[1032] BC4J Property jbo.server.useNullDbTransaction='false' -->(SessionImpl) from System Default
[1033] Copying unknown Client property (jbo.applicationmoduleclassname='ehis.ok.da.EhisOkModule') to session
[1034] Copying unknown Client property (ApplicationName='ehis.ok.da.EhisOkModule') to session
[1035] Copying unknown Client property (JDBCDataSource='jdbc/OKREGDS') to session
[1036] Copying unknown Client property (jbo.jdbc.connectstring='jdbc/OKREGDS') to session
[1037] Copying unknown Client property (jbo.jndi.use_default_context='true') to session
[1038] Copying unknown Client property (DBconnection='jdbc/OKREGDS') to session
[1039] WARNING: Unused property: LC='Calling Function' found in /oracle/jbo/common/Diagnostic.properties resource
[1040] }} finished loading BC4J properties
[1041] -----------------------------------------------------------