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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