Erro aleatório com contexão informix: "java.sql.SQLException: Syst

Estou com um problema aleatório ao realizar a conexão com o informix usando pool de conexão do tomcat, segue abaixo o erro:

java.sql.SQLException: System or internal error java.io.IOException at com.informix.util.IfxErrMsg.getSQLException(Unknown Source) at com.informix.jdbc.IfxSqli.handleSocketException(Unknown Source) at com.informix.jdbc.IfxSqli.receiveMessage(Unknown enter code hereSource) at com.informix.jdbc.IfxSqli.executePrepare(Unknown Source) at com.informix.jdbc.IfxPreparedStatement.setupExecutePrepare(Unknown Source) at com.informix.jdbc.IfxPreparedStatement.processSQL(Unknown Source) at com.informix.jdbc.IfxPreparedStatement.(Unknown Source) at com.informix.jdbc.IfxSqliConnect.createPreparedStmt(Unknown Source) at com.informix.jdbc.IfxSqliConnect.prepareStatement(Unknown Source) at org.apache.tomcat.dbcp.dbcp2.DelegatingConnection.prepareStatement(DelegatingConnection.java:291) at org.apache.tomcat.dbcp.dbcp2.DelegatingConnection.prepareStatement(DelegatingConnection.java:291) at br.com.solcast.integrador.dao.sisdia.PedidoVendaDAO.carregar(PedidoVendaDAO.java:169) at br.com.solcast.integrador.service.sisdia.PedidoVendaService.carregar(PedidoVendaService.java:99) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:267) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473) at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at br.com.solcast.integrador.security.RestAuthenticationFilter.doFilter(RestAuthenticationFilter.java:43) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Unknown Source) Caused by: java.io.IOException at com.informix.asf.IfxDataInputStream.readFully(Unknown Source) at com.informix.asf.IfxDataInputStream.readSmallInt(Unknown Source) ... 61 more

Para realizar a conexão utilizo a seguinte classe:

public class DAOManager { private DataSource src; private Connection con;

public void open() throws SQLException { try { if(this.con==null || this.con.isClosed()) this.con = src.getConnection(); } catch(SQLException e) { throw e; } }

public void close() throws SQLException { try { if(this.con!=null && !this.con.isClosed()) { this.con.close(); this.con = null; } } catch(SQLException e) { throw e; } finally { if (this.con != null) { try { this.con.close(); } catch (SQLException e) { ; } this.con = null; } } }

public DAOManager() throws NamingException { Context initContext = new InitialContext(); Context envContext = (Context)initContext.lookup("java:/comp/env"); this.src = (DataSource)envContext.lookup("jdbc/cortex-sisdia"); }

public Object gerarDAO(DAO dao) throws SQLException { if (this.con == null || this.con.isClosed()) this.open();

switch (dao) { case AGENDAMENTOOFICINA: return new AgendamentoOficinaDAO(this.con);

case ESTOQUE: return new EstoqueDAO(this.con);

case PEDIDOVENDA: return new PedidoVendaDAO(this.con);

case PESSOA: return new PessoaDAO(this.con);

case VEICULO: return new AgendamentoOficinaDAO(this.con);

default: return null; } }

@Override protected void finalize() { try{ this.close(); } catch (SQLException e) { e.printStackTrace(); } finally{ try { super.finalize(); } catch (Throwable e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }

Alguém teria uma solução, aparentemente ocorre pela quantidade de pools ativos.