JR report is not generating on Linux using Struts

I've tried to show JR report in Linux. I got an error just now and the production is about in a few hours from now. First it worked fine on Windows. My application server is GlassFish 2.1, OS is RedHat, framework is Struts 2.

I get frustrated because there is no log error (exception) in my log (GlassFish server log). I've checked the connection, it seems fine (using jdbc):

public String getConnection() {
        try {
            Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance();
            myConnectionObj = DriverManager.getConnection ("jdbc:derby://127.0.0.1:1527/timesheet_db;create=true;user=app;password=app");
        return SUCCESS;
        } catch (Exception e) {
            e.printStackTrace();
            return ERROR;
        }
    }

My Struts 2 XML for JR:

<action name="ResourcePlan8"
            class="com.promo.accountsys.web.action.ReportResourcePlanAction"
            method="getConnection">
            <result name="success" type="jasper">
                <param name="location">/jasper/ResourcePlanConn9.jasper</param>
                <param name="dataSource">totalEffortProjectList</param>
                <param name="connection">myConnectionObj</param>
                <param name="format">PDF</param>
                <param name="dynamicReport">myDynamicReport</param>
                <param name="layoutManager">classic</param>
                <param name="documentName">Resouce_Plan</param>
                <param name="contentDisposition">application/download</param>
            </result>
            <result name="error">/jsp/report/initreport.jsp</result>
        </action>

Because of the no error log I am lost I think, maybe in generated report I'm missing to configure Linux (still not sure). My friend just had a problem with font but he is using Birt report. He says the report is still generated with default font in Linux, but my error is not showing any report. I think I missed something to configure when I moved it to Linux.

Set the property net.sf.jasperreports.awt.ignore.missing.font to true in your jrxml and try. If it generates the report then you can solve the issue by using the font extensions of jasper reports.