java.sql.SQLRecoverableException: Geschlossene Verbindung; State=08003; ErrorCode=17008

Bin ich immer die folgende Fehlermeldung beim einfügen von einigen Zeilen in der oracle-Datenbank-Tabelle durch die Verwendung von Schleifen java meine Schleife gehen fast 25000 mal:

java.sql.SQLRecoverableException: Closed Connection; State=08003; ErrorCode=1700
    8
            at oracle.jdbc.driver.PhysicalConnection.prepareStatement(PhysicalConnec
    tion.java:3331)
            at com.mchange.v2.c3p0.impl.NewProxyConnection.prepareStatement(NewProxy
    Connection.java:275)
            at org.compiere.db.PreparedStatementProxy.init(PreparedStatementProxy.ja
    va:71)
            at org.compiere.db.PreparedStatementProxy.<init>(PreparedStatementProxy.
    java:44)
            at org.compiere.db.ProxyFactory.newCPreparedStatement(ProxyFactory.java:
    54)
            at org.compiere.util.DB.executeUpdate(DB.java:1007)
            at org.compiere.util.DB.executeUpdate(DB.java:877)
            at org.compiere.util.DB.executeUpdate(DB.java:864)
            at org.compiere.report.FinReport.insertLineSource(FinReport.java:1033)
            at org.compiere.report.FinReport.insertLineDetail(FinReport.java:844)
            at org.compiere.report.FinReport.doIt(FinReport.java:306)
            at org.compiere.process.SvrProcess.process(SvrProcess.java:147)
            at org.compiere.process.SvrProcess.startProcess(SvrProcess.java:105)

Unten ist mein code:

private void insertLineSource (int line)
{
    log.info("Line=" + line + " - " + m_lines[line]);

    // No source lines
    if (m_lines[line] == null || m_lines[line].getSources().length == 0)
        return;
    String variable = m_lines[line].getSourceColumnName();
    if (variable == null)
        return;
    log.fine("Variable=" + variable);

    // Insert
    StringBuffer insert = new StringBuffer("INSERT INTO T_Report "
        + "(AD_PInstance_ID, PA_ReportLine_ID, Record_ID,Fact_Acct_ID,LevelNo ");
    for (int col = 0; col < m_columns.length; col++)
        insert.append(",Col_").append(col);
    // Select
    insert.append(") SELECT ")
        .append(getAD_PInstance_ID()).append(",")
        .append(m_lines[line].getPA_ReportLine_ID()).append(",")
        .append(variable).append(",0,");
    if (p_DetailsSourceFirst)
        insert.append("-1 ");
    else
        insert.append("1 ");

    // for all columns create select statement
    for (int col = 0; col < m_columns.length; col++)
    {
        insert.append(", ");
        // No calculation
        if (m_columns[col].isColumnTypeCalculation())
        {
            insert.append("NULL");
            continue;
        }

        // SELECT SUM()
        StringBuffer select = new StringBuffer ("SELECT ");
        if (m_lines[line].getPAAmountType() != null)                // line amount type overwrites column
            select.append (m_lines[line].getSelectClause (true));
        else if (m_columns[col].getPAAmountType() != null)
            select.append (m_columns[col].getSelectClause (true));
        else
        {
            insert.append("NULL");
            continue;
        }

        if (p_PA_ReportCube_ID > 0) {
            select.append(" FROM Fact_Acct_Summary fb WHERE DateAcct ");
        }  //report cube
        else {
        // Get Period info
            select.append(" FROM Fact_Acct fb WHERE TRUNC(DateAcct, 'DD') ");
        }
        FinReportPeriod frp = getPeriod (m_columns[col].getRelativePeriod());
        if (m_lines[line].getPAPeriodType() != null)            // line amount type overwrites column
        {
            if (m_lines[line].isPeriod())
                select.append(frp.getPeriodWhere());
            else if (m_lines[line].isYear())
                select.append(frp.getYearWhere());
            else if (m_lines[line].isNatural())
                select.append(frp.getNaturalWhere("fb"));
            else
                select.append(frp.getTotalWhere());
        }
        else if (m_columns[col].getPAPeriodType() != null)
        {
            if (m_columns[col].isPeriod())
                select.append(frp.getPeriodWhere());
            else if (m_columns[col].isYear())
                select.append(frp.getYearWhere());
            else if (m_columns[col].isNatural())
                select.append(frp.getNaturalWhere("fb"));
            else
                select.append(frp.getTotalWhere());
        }
        // Link
        select.append(" AND fb.").append(variable).append("=x.").append(variable);
        // PostingType
        if (!m_lines[line].isPostingType())     // only if not defined on line
        {
            String PostingType = m_columns[col].getPostingType();
            if (PostingType != null && PostingType.length() > 0)
                select.append(" AND fb.PostingType='").append(PostingType).append("'");
            //globalqss - CarlosRuiz
            if (PostingType.equals(MReportColumn.POSTINGTYPE_Budget)) {
                if (m_columns[col].getGL_Budget_ID() > 0)
                    select.append(" AND GL_Budget_ID=" + m_columns[col].getGL_Budget_ID());
            }
            //end globalqss
        }
        // Report Where
        String s = m_report.getWhereClause();
        if (s != null && s.length() > 0)
            select.append(" AND ").append(s);
        // Limited Segment Values
        if (m_columns[col].isColumnTypeSegmentValue())
            select.append(m_columns[col].getWhereClause(p_PA_Hierarchy_ID));

        // Parameter Where
        select.append(m_parameterWhere);
    // System.out.println("    c=" + col + ", l=" + line + ": " + select);
        //
        insert.append("(").append(select).append(")");
    }
    // WHERE (sources, posting type)
    StringBuffer where = new StringBuffer(m_lines[line].getWhereClause(p_PA_Hierarchy_ID));
    String s = m_report.getWhereClause();
    if (s != null && s.length() > 0)
    {
        if (where.length() > 0)
            where.append(" AND ");
        where.append(s);
    }
    if (where.length() > 0)
        where.append(" AND ");
    where.append(variable).append(" IS NOT NULL");

    if (p_PA_ReportCube_ID > 0)
        insert.append(" FROM Fact_Acct_Summary x WHERE ").append(where);
    else
    // FROM .. WHERE
    insert.append(" FROM Fact_Acct x WHERE ").append(where);    
    //
    insert.append(m_parameterWhere)
        .append(" GROUP BY ").append(variable);

    int no = DB.executeUpdate(insert.toString(), get_TrxName());
    if (CLogMgt.isLevelFinest())
        log.fine("Source #=" + no + " - " + insert);
    if (no == 0)
        return;

    // Set Name,Description
    StringBuffer sql = new StringBuffer ("UPDATE T_Report SET (Name,Description)=(")
        .append(m_lines[line].getSourceValueQuery()).append("T_Report.Record_ID) "
        //
        + "WHERE Record_ID <> 0 AND AD_PInstance_ID=").append(getAD_PInstance_ID())
        .append(" AND PA_ReportLine_ID=").append(m_lines[line].getPA_ReportLine_ID())
        .append(" AND Fact_Acct_ID=0");
    no = DB.executeUpdate(sql.toString(), get_TrxName());
    if (CLogMgt.isLevelFinest())
        log.fine("Name #=" + no + " - " + sql.toString());

    if (m_report.isListTrx())
        insertLineTrx (line, variable);
}   // insertLineSource