Hi Thomas I don't know, but perhaps this helps:
http://www.websina.com/bugzero/kb/oracle-connection.html This was one problem in our installation. An other problem could be that some Broker stay open after use. I had this behavior in my tomcat-application. After I checked the code where a PersistenceBroker is used and implemented the call of the close method correctly at the end of any request (also if it throws an exception!), it works fine. regards Roland Ribi -----Original Message----- From: Thomas Franke [mailto:[EMAIL PROTECTED] Sent: Thursday, November 11, 2004 11:00 AM To: OJB Users List Subject: Re: validation query for connection failed Armin Waibel wrote: > which version of OJB do you use? We still use db-ojb-1.0.rc6 but we are going to use the current realease. > Normally ConnectionFactoryPooledImpl tries 100 times to lookup a valid > connection from the DB, so you should get the warning several times > before the pool break. > Could you post the whole stack trace? Here it is: -----------------------------begin [org.apache.ojb.broker.accesslayer.ConnectionFactoryPooledImpl] WARN: Validation query for connection failed, discard connection. Query was select count(*) from datenklasse, Message was E/A-Exception: Socket closed [org.apache.ojb.broker.accesslayer.ConnectionFactoryPooledImpl] WARN: Validation query for connection failed, discard connection. Query was select count(*) from datenklasse, Message was E/A-Exception: Socket closed [org.apache.ojb.broker.accesslayer.ConnectionFactoryPooledImpl] WARN: Validation query for connection failed, discard connection. Query was select count(*) from datenklasse, Message was E/A-Exception: Socket closed [org.apache.ojb.broker.accesslayer.JdbcAccessImpl] ERROR: PersistenceBrokerException during the execution of the query: Used ConnectionManager instance could not obtain a connection Used ConnectionManager instance could not obtain a connection org.apache.ojb.broker.PersistenceBrokerException: Used ConnectionManager instance could not obtain a connection at org.apache.ojb.broker.accesslayer.StatementManager.getPreparedStatement(Unkn own Source) at org.apache.ojb.broker.accesslayer.JdbcAccessImpl.executeQuery(Unknown Source) at org.apache.ojb.broker.accesslayer.RsQueryObject.performQuery(Unknown Source) at org.apache.ojb.broker.accesslayer.RsIterator.<init>(Unknown Source) at org.apache.ojb.broker.core.RsIteratorFactoryImpl.createRsIterator(Unknown Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getRsIteratorFromQuery(Unkn own Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getIteratorFromQuery(Unknow n Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getObjectByQuery(Unknown Source) at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getObjectByQuery(Unkn own Source) at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getObjectByQuery(Unkn own Source) at de.mhr.wis.DBAdapter.ojbAdapter.Utils.getWea(Utils.java:627) at de.mhr.wis.DBAdapter.ojbAdapter.management.OjbLogbuchAdapter.importStatusdat en(OjbLogbuchAdapter.java:392) at de.mhr.wis.businessLayer.logic.management.LogBook.importStatusdaten(LogBook. java:879) at de.mhr.wis.businessLayer.facades.rawdata.RawDataFacade.importStatusdaten(Raw DataFacade.java:50) at de.mhr.wis.communicationlayer.communicationmanager.importers.MitaImporter.im portStatus(MitaImporter.java:723) at de.mhr.wis.communicationlayer.communicationmanager.importers.MitaImporter.im portSingleRawFile(MitaImporter.java:358) at de.mhr.wis.communicationlayer.communicationmanager.importers.MitaImporter.im portRawFile(MitaImporter.java:249) at de.mhr.wis.communicationlayer.communicationmanager.RawFileManager.run(RawFil eManager.java:221) Caused by: org.apache.ojb.broker.accesslayer.LookupException: Could not borrow connection from pool - org.apache.ojb.broker.metadata.JdbcConnectionDescriptor: [EMAIL PROTECTED] jcd-alias=default default-connection=true dbms=Oracle9i jdbc-level=2.0 driver=oracle.jdbc.driver.OracleDriver protocol=jdbc sub-protocol=oracle db-alias=thin:@(description=(address=(host=xxx.xx.x.xxx)(protocol=tcp)(port= 1521))(connect_data=(sid=xxx)(server=dedicated))) user=xx password=***** eager-release=false ConnectionPoolDescriptor={whenExhaustedAction=1, validationQuery=select count(*) from datenklasse, maxIdle=10, maxActive=41, maxWait=20000, removeAbandoned=false, numTestsPerEvictionRun=10, testWhileIdle=true, minEvictableIdleTimeMillis=-1, testOnReturn=false, logAbandoned=false, removeAbandonedTimeout=300, timeBetweenEvictionRunsMillis=-1, testOnBorrow=true} batchMode=false useAutoCommit=AUTO_COMMIT_SET_TRUE_AND_TEMPORARY_FALSE ignoreAutoCommitExceptions=false [EMAIL PROTECTED] sequenceManagerClass=class org.apache.ojb.broker.util.sequence.SequenceManagerOracleSequenceImpl Properties={autoNaming=true, globalSequenceId=false, globalSequenceStart=10000, grabSize=20} ] ] at org.apache.ojb.broker.accesslayer.ConnectionFactoryPooledImpl.getConnectionF romPool(Unknown Source) at org.apache.ojb.broker.accesslayer.ConnectionFactoryAbstractImpl.lookupConnec tion(Unknown Source) at org.apache.ojb.broker.accesslayer.ConnectionManagerImpl.getConnection(Unknow n Source) ... 18 more Caused by: java.util.NoSuchElementException: Timeout waiting for idle object at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPoo l.java:801) ... 21 more [org.apache.ojb.broker.accesslayer.JdbcAccessImpl] ERROR: PersistenceBrokerException during the execution of the query: Used ConnectionManager instance could not obtain a connection Used ConnectionManager instance could not obtain a connection org.apache.ojb.broker.PersistenceBrokerException: Used ConnectionManager instance could not obtain a connection at org.apache.ojb.broker.accesslayer.StatementManager.getPreparedStatement(Unkn own Source) at org.apache.ojb.broker.accesslayer.JdbcAccessImpl.executeQuery(Unknown Source) at org.apache.ojb.broker.accesslayer.RsQueryObject.performQuery(Unknown Source) at org.apache.ojb.broker.accesslayer.RsIterator.<init>(Unknown Source) at org.apache.ojb.broker.core.RsIteratorFactoryImpl.createRsIterator(Unknown Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getRsIteratorFromQuery(Unkn own Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getIteratorFromQuery(Unknow n Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getObjectByQuery(Unknown Source) at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getObjectByQuery(Unkn own Source) at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getObjectByQuery(Unkn own Source) at de.mhr.wis.DBAdapter.ojbAdapter.Utils.getWea(Utils.java:627) at de.mhr.wis.DBAdapter.ojbAdapter.management.OjbLogbuchAdapter.importStatusdat en(OjbLogbuchAdapter.java:392) at de.mhr.wis.businessLayer.logic.management.LogBook.importStatusdaten(LogBook. java:879) at de.mhr.wis.businessLayer.facades.rawdata.RawDataFacade.importStatusdaten(Raw DataFacade.java:50) at de.mhr.wis.communicationlayer.communicationmanager.importers.MitaImporter.im portStatus(MitaImporter.java:723) at de.mhr.wis.communicationlayer.communicationmanager.importers.MitaImporter.im portSingleRawFile(MitaImporter.java:358) at de.mhr.wis.communicationlayer.communicationmanager.importers.MitaImporter.im portRawFile(MitaImporter.java:249) at de.mhr.wis.communicationlayer.communicationmanager.RawFileManager.run(RawFil eManager.java:221) Caused by: org.apache.ojb.broker.accesslayer.LookupException: Could not borrow connection from pool - org.apache.ojb.broker.metadata.JdbcConnectionDescriptor: [EMAIL PROTECTED] ---------------------------end and so on. Is the information enough or do you need any more? Thanks for help! regards Thomas >> Hello there, >> >> Our application should work twenty-for seven. Suddenly an exception >> occurs. This exception isn't caught in the application, instead I see >> it on the console. (At the moment we start the application from the >> console). >> >> For example I see: >> >> ... WARN: Validation query for connection failed. >> ... >> >> Nested Exception >> >> unexpected end of input stream >> >> ... >> >> >> >> After that the application doesn't work anymore. It seems like I can >> no longer establish a connection to the database. The only way to get >> the application running again is the comlete new start. >> >> We use the following classes: >> >> -----------------------begin >> >> ConnectionFactoryClass=org.apache.ojb.broker.accesslayer.ConnectionFactoryPo oledImpl >> >> >> ConnectionManagerClass=org.apache.ojb.broker.accesslayer.ConnectionManagerIm pl >> >> >> -----------------------end >> >> >> The repository.xml looks like this for example: >> >> --------------------------begin >> >> <class-descriptor >> class="de.softenery.wis.mydata" >> table="mydata" >> > >> <field-descriptor id="1" >> name="id" >> column="mydata_id" >> jdbc-type="INTEGER" >> primarykey="true" >> autoincrement="true" >> access="readonly" >> /> >> <field-descriptor id="2" >> name="weaId" >> column="w_id" >> jdbc-type="INTEGER" >> /> >> <field-descriptor id="22" >> name="modifikation" >> column="modifikation" >> jdbc-type="TIMESTAMP" >> conversion="de.mhr.wis.DBAdapter.ojbAdapter.Calendar2Timestamp" >> /> >> <field-descriptor id="23" >> name="timestamp" >> column="zeitstempel" >> jdbc-type="TIMESTAMP" >> conversion="de.mhr.wis.DBAdapter.ojbAdapter.Calendar2Timestamp" >> /> >> </class-descriptor> >> >> ---------------end >> >> The repository_database.xml looks like this: >> >> ------------------begin >> >> <jdbc-connection-descriptor >> jcd-alias="sow" >> default-connection="true" >> platform="MySQL" >> jdbc-level="2.0" >> driver="org.gjt.mm.mysql.Driver" >> protocol="jdbc" >> subprotocol="mysql" >> dbalias="//192.99.90.199:3306/sow" >> username="gogo" >> password="45jdkekdl" >> eager-release="false" >> batch-mode="false" >> useAutoCommit="1" >> ignoreAutoCommitExceptions="false" >> > >> >> <connection-pool whenExhaustedAction="2" maxActive="21" >> validationQuery="select count(*) from datenklasse" /> >> >> <sequence-manager >> >> className="org.apache.ojb.broker.util.sequence.SequenceManagerNativeImpl"> >> >> </sequence-manager> >> </jdbc-connection-descriptor> >> >> ---------------end >> >> >> And the code looks like this: >> >> ----------------------begin >> >> try { >> broker = PersistenceBrokerFactory.defaultPersistenceBroker(); >> broker.beginTransaction(); >> >> [...] >> broker.getObjectByQuery(query); >> [...] >> >> broker.store(data); >> } >> broker.commitTransaction(); >> >> } catch (TransactionInProgressException e) { >> logger.error(e); >> } catch (TransactionAbortedException e) { >> logger.error(e); >> } catch (TransactionNotInProgressException e) { >> logger.error(e); >> } catch (PBFactoryException e) { >> logger.error(e); >> } catch (PersistenceBrokerException e) { >> logger.error(e); >> } catch (Exception e) { >> logger.error(e); >> } finally { >> if (broker != null) { >> broker.clearCache(); >> broker.close(); >> } >> } >> >> >> >> ----------------end >> >> Can anyone give me any help on this? >> >> regards >> >> Thomas -- Mit freundlichen Grüßen Thomas Franke Geschäftsführer softEnergy GmbH ---------------------------- The energy for a better world ---------------------------- softEnergy GmbH Platz der Freundschaft 1 18059 Rostock ---------------------------- fon: +49 381 40 587 535 fax: +49 381 40 587 555 mobil: +49 1715222015 http://www.softenergy.de mail: [EMAIL PROTECTED] ---------------------------- --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
