regards, Armin
Lance Eason wrote:
The only way OJB can know whether the connection has been closed is if you set it up to test the connections in the pool. Your connection descriptor is set up halfway to do that, it specifies testOnBorrow, testOnReturn and testWhileIdle but you haven't provided a validationQuery for it to test with. I'd make the following changes: validationQuery="SELECT 1 FROM dual" testOnReturn="false" (Having the pool test both when the connection is returned and when it's borrowed is just way overkill.)
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 17, 2003 9:57 AM To: [EMAIL PROTECTED] Subject: SQLException Socket Closed with Oracle 9 and RC5
For some reason, it looks like OJB doesn't know when a connection has been closed, or there is something wrong with my setup. I'm using OJB rc5, with Oracle 9.2.0, and ojdbc4.jar (for JDK 1.4.x). It seems that when the app is not used and left idle, that connections are closed, but then when it is hit again, it tries to use the connections, throws the exception, and then notes the socket as closed.
here is my repository_database entry:
<!-- Datasource for Acronyms --> <jdbc-connection-descriptor jcd-alias="acronyms" default-connection="true" platform="Oracle" jdbc-level="2.0" driver="oracle.jdbc.OracleDriver" protocol="jdbc" subprotocol="oracle" dbalias="thin:@hpspdb1:1521:HPSPDB" username="uname" password="upass" eager-release="true" batch-mode="false" useAutoCommit="0" ignoreAutoCommitExceptions="true"> <connection-pool maxActive="1" maxIdle="2" maxWait="3" minEvictableIdleTimeMillis="4" numTestsPerEvictionRun="5" testOnBorrow="true" testOnReturn="true" testWhileIdle="true" timeBetweenEvictionRunsMillis="6" whenExhaustedAction="2" validationQuery="" logAbandoned="true" removeAbandoned="true" removeAbandonedTimeout="8"/> <sequence-manager className="org.apache.ojb.broker.util.sequence.SequenceManagerHighLowImpl"> <attribute attribute-name="grabSize" attribute-value="100"/> <attribute attribute-name="autoNaming" attribute-value="true"/> <attribute attribute-name="globalSequenceId" attribute-value="false"/> <attribute attribute-name="globalSequenceStart" attribute-value="10000"/> </sequence-manager> </jdbc-connection-descriptor>
here is the exception:
java.sql.SQLException: Io exception: Socket closed at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:333) at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:389) at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:413) at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedStatement.java:119) at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedStatement.java:92) at oracle.jdbc.driver.OracleConnection.privatePrepareStatement(OracleConnection.java:950) at oracle.jdbc.driver.OracleConnection.prepareStatement(OracleConnection.java:802) at org.apache.ojb.broker.accesslayer.StatementsForClassImpl.prepareStatement(Unknown Source) at org.apache.ojb.broker.accesslayer.StatementsForClassImpl.prepareStatement(Unknown Source) at org.apache.ojb.broker.accesslayer.StatementsForClassImpl.getPreparedStmt(Unknown Source) at org.apache.ojb.broker.accesslayer.StatementManager.getPreparedStatement(Unknown 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(Unknown Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getIteratorFromQuery(Unknown Source) at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(Unknown Source) at gov.hhs.acronyms.sql.AcronymDAO.selectAcronyms(AcronymDAO.java:80) at gov.hhs.acronyms.actions.SearchAction.execute(SearchAction.java:68) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) at javax.servlet.http.HttpServlet.service(HttpServlet.java:165) at javax.servlet.http.HttpServlet.service(HttpServlet.java:103) at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:113) at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:190) at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:177) at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:221) at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:253) at com.caucho.server.port.TcpConnection.run(TcpConnection.java:305) at com.caucho.util.ThreadPool.run(ThreadPool.java:273) at java.lang.Thread.run(Thread.java:534) org.apache.ojb.broker.PersistenceBrokerSQLException: java.sql.SQLException: Io exception: Socket closed at org.apache.ojb.broker.accesslayer.StatementsForClassImpl.getPreparedStmt(Unknown Source) at org.apache.ojb.broker.accesslayer.StatementManager.getPreparedStatement(Unknown 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(Unknown Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getIteratorFromQuery(Unknown Source) at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(Unknown Source) at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(Unknown Source) at gov.hhs.acronyms.sql.AcronymDAO.selectAcronyms(AcronymDAO.java:80) at gov.hhs.acronyms.actions.SearchAction.execute(SearchAction.java:68) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) at javax.servlet.http.HttpServlet.service(HttpServlet.java:165) at javax.servlet.http.HttpServlet.service(HttpServlet.java:103) at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:113) at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:190) at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:177) at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:221) at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:253) at com.caucho.server.port.TcpConnection.run(TcpConnection.java:305) at com.caucho.util.ThreadPool.run(ThreadPool.java:273) at java.lang.Thread.run(Thread.java:534) Caused by: java.sql.SQLException: Io exception: Socket closed at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:333) at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:389) at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:413) at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedStatement.java:119) at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedStatement.java:92) at oracle.jdbc.driver.OracleConnection.privatePrepareStatement(OracleConnection.java:950) at oracle.jdbc.driver.OracleConnection.prepareStatement(OracleConnection.java:802) at org.apache.ojb.broker.accesslayer.StatementsForClassImpl.prepareStatement(Unknown Source) at org.apache.ojb.broker.accesslayer.StatementsForClassImpl.prepareStatement(Unknown Source) ... 30 more
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