Connection timeout in com.isomorphic.sql.PoolableSQLConnectionFactory.validateObject(PoolableSQLConnectionFactory.java:221)

Hi Isomorphic,

after a network change (before: DB and application server on the same system, now different systems very close by, but not behind same firewall) this exception happens out of the blue from time to time (current 6.1p).
I'm not sure it has any negative consequences, but wanted to double check with you.
Does your pool invalidate connections when this happens and use others instead?

Code:

=== 2018-10-18 04:30:17,727 [c-13] WARN  PoolableSQLConnectionFactory - [builtinApplication.fetchFirstRow] Exception running pingTest: IO Error: Connection timed out (Read failed)
java.sql.SQLRecoverableException: Closed Connection
    at oracle.jdbc.driver.PhysicalConnection.needLine(PhysicalConnection.java:5416)
    at oracle.jdbc.driver.OracleStatement.closeOrCache(OracleStatement.java:1585)
    at oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:1570)
    at oracle.jdbc.driver.OracleStatementWrapper.close(OracleStatementWrapper.java:94)
    at org.apache.commons.dbcp.DelegatingStatement.close(DelegatingStatement.java:168)
    at com.isomorphic.sql.PoolableSQLConnectionFactory.validateObject(PoolableSQLConnectionFactory.java:221)
    at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1205)
    at com.isomorphic.pool.ISCObjectPool.borrowObject(ISCObjectPool.java:112)
    at com.isomorphic.pool.PoolManager.borrowObject(PoolManager.java:102)
    at com.isomorphic.pool.PoolManager.borrowObject(PoolManager.java:76)
    at com.isomorphic.sql.SQLConnectionManager.getConnection(SQLConnectionManager.java:177)
    at com.isomorphic.sql.SQLDriver.getTransformedResults(SQLDriver.java:950)
    at com.isomorphic.sql.SQLDriver.executeQuery(SQLDriver.java:1391)
    at com.isomorphic.sql.SQLDataSource.executeNativeQuery(SQLDataSource.java:585)
    at com.isomorphic.sql.SQLDataSource.executeNativeQuery(SQLDataSource.java:579)
    at com.isomorphic.sql.SQLDataSource.SQLExecute(SQLDataSource.java:1768)
    at com.isomorphic.sql.SQLDataSource.processRequest(SQLDataSource.java:439)
    at com.isomorphic.sql.SQLDataSource.executeFetch(SQLDataSource.java:384)
    at com.lmscompany.lms.server.LMSSQLDataSource.executeFetch(LMSSQLDataSource.java:148)
    at com.isomorphic.datasource.DataSource.execute(DataSource.java:2274)
    at com.isomorphic.application.AppBase.executeDefaultDSOperation(AppBase.java:638)
    at com.isomorphic.application.AppBase.executeAppOperation(AppBase.java:548)
    at com.isomorphic.application.AppBase.execute(AppBase.java:491)
    at com.isomorphic.datasource.DSRequest.execute(DSRequest.java:2815)
    at com.lmscompany.lms.server.SendMail.writeActionMails(SendMail.java:161)
    at com.lmscompany.lms.server.SendMail.doGet(SendMail.java:41)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:247)
    at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:93)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
    at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:479)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)

Best regards
Blama

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