How to close timeout connection in SQLDBC ?

Question

Hello,
I use SQLDBC to access MAXDB 7.7.0.7.16 database, i have the following issue :
When a connection reach timeout, I close the connection, and the release the connexion, and then I create a new connection
To close connection I call my Disconnect function
                    The call close method return "Not connected", but It seems that the underlying Socket is not closed and the Database user task is not closed.
So the number of task grow until it reach the maximun.
Where is my error ?
How can I be sure to close the database user task ?
IDBError CMaxDBConnection::Disconnect()
     IDBError hr;
     if (m_pConnection)          
          EDPTRACE_DBG_INF(L"CMaxDBConnection::Disconnect %1", EDPMASK_TRC_CONNECTIONS) << (DWORD)m_pConnection;
          SQLDBC_Retcode rc = m_pConnection->close();
          if (SQLDBC_OK != rc)
               hr = convertError(rc, m_pConnection->error(), L"CMaxDBConnection::Disconnect");               
          m_pParent->m_pEnvironment->releaseConnection(m_pConnection);
          m_pConnection = NULL;
     return hr;
Regards
Yann

Answer 1

MAXDB 7.7.07.16 (WINDOWS 2008 R2 (64 bits) Client program in 32bits.
Hello
I have code a small program to illustrate my issue.
When I create a connection with SQLDBC it create 2 user tasks in the MAXDB task Manager
One uer task  APPPLICATION SERVER, SESSION TIMOUT, ... filled.
T425  10 0x16AC User      2688* Command wait        823 0            76 20691065(s)
and One User task with no session tiemout.
T111   8 0x15B8 User       2688 Command wait       3009 0            76 24900501(s)
T111                  USER             ( pid = 2688       ) -
dispatcher_cnt: 2                                     command_cnt   : 2
exclusive_cnt : 30                                    self_susp_cnt : 0
state_vwait   : 0          state_vsleep  : 0          state_vsusp   : 0
same_ukt_coll : 0        
when I close the connection the task T111 is never remove !!
Do you have any idea ?
I try to delete environment but It does not work.
Regards
Yann.
Here is the code  :
// SQLDBC.cpp : Defines the entry point for the console application.
#include "stdafx.h"
#include "SQLDBC.h"
using namespace SQLDBC;
static void parseArgs(int argc, wchar_t **argv);
static SQLDBC_Connection *connectDB();
SQLDBC_Environment *g_env;
typedef struct ConnectArgsT {
  bstrt username;
  bstrt password;
  bstrt dbname;  
  bstrt host;    
  bstrt request;    
} ConnectArgsT;
ConnectArgsT connectArgs;
void exitOnError(SQLDBC_ErrorHndl &err);
int _tmain(int argc, _TCHAR* argv[])
     SQLDBC_Retcode ret;
   parseArgs(argc, argv);
   for (int j = 0 ; j < 10 ; ++j)
        for (int i = 0 ; i < 100 ; ++ i)
             SQLDBC_Connection *conn = connectDB();
             ret = conn->close();
             ret = conn->disconnect();
             g_env->releaseConnection(conn);
        delete g_env;
        g_env = NULL;
   return 0;
SQLDBC_Connection *connectDB()
  char errorText[200];
  SQLDBC_Retcode rc;
  if (g_env == NULL)
Every application has to initialize the SQLDBC library by getting a
reference to the ClientRuntime and calling the SQLDBC_Environment constructor.
       SQLDBC_IRuntime *runtime;      
       runtime = SQLDBC::GetClientRuntime(errorText, sizeof(errorText));
       if (!runtime) {
          fprintf(stderr, "Getting instance of the ClientRuntime failed %s\n", errorText);          
       g_env = new SQLDBC_Environment(runtime);      
Create a new connection object and open a session to the database.
  SQLDBC_Connection *conn = g_env->createConnection();
  printf("Connecting to '%s' on '%s' as user '%s'\n",
         (char)connectArgs.dbname, (char)connectArgs.host, (char*)connectArgs.username);
  rc = conn->connect(connectArgs.host, connectArgs.dbname,
                     connectArgs.username, connectArgs.password);
  if(SQLDBC_OK != rc) {
    fprintf(stderr, "Can't connect to '%s'.\nERROR: %d:'%s'\n",
            connectArgs.dbname, conn->error().getErrorCode(), conn->error().getErrorText());
    exit(1);
     conn->setAutoCommit(SQLDBC_TRUE);
  return conn;
static void parseArgs (int argc, wchar_t **argv)
  connectArgs.username = "ESKDBADM";
  connectArgs.password = "DELORME";
  connectArgs.dbname = "EDP350";
  connectArgs.host = "ly-delorme"; 
void exitOnError(SQLDBC_ErrorHndl &err)
  if(err) {
    fprintf(stderr, "Execution stopped %d:'%s'", err.getErrorCode(), err.getErrorText());
    //exit(1);
Yann.