Erro no Ubuntu Server 12.04 não consegui ainda resolver

erro 500

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /cadastros/prod/rel/openReport2.jsp at line 48

45:  
46:  
47:   java.io.File reportFile = new java.io.File(reportFilename);
48:   byte[] buffer = net.sf.jasperreports.engine.JasperRunManager.runReportToPdf(
49:    reportFilename,
50:    parameters,
51:    con


Stacktrace:
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

javax.servlet.ServletException: java.lang.Error: Probable fatal error:No fonts found.
	org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:865)
	org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:794)
	org.apache.jsp.cadastros.prod.rel.openReport2_jsp._jspService(openReport2_jsp.java:144)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

java.lang.Error: Probable fatal error:No fonts found.
	sun.font.FontManager.getDefaultPhysicalFont(FontManager.java:1087)
	sun.font.FontManager.initialiseDeferredFont(FontManager.java:966)
	sun.font.CompositeFont.doDeferredInitialisation(CompositeFont.java:254)
	sun.font.CompositeFont.getSlotFont(CompositeFont.java:334)
	sun.font.CompositeStrike.getStrikeForSlot(CompositeStrike.java:77)
	sun.font.CompositeStrike.getFontMetrics(CompositeStrike.java:93)
	sun.font.Font2D.getFontMetrics(Font2D.java:387)
	java.awt.Font.defaultLineMetrics(Font.java:2123)
	java.awt.Font.getLineMetrics(Font.java:2230)
	java.awt.font.TextMeasurer.initAll(TextMeasurer.java:235)
	java.awt.font.TextMeasurer.<init>(TextMeasurer.java:167)
	java.awt.font.LineBreakMeasurer.<init>(LineBreakMeasurer.java:310)
	java.awt.font.LineBreakMeasurer.<init>(LineBreakMeasurer.java:277)
	net.sf.jasperreports.engine.fill.TextMeasurer.renderParagraph(TextMeasurer.java:268)
	net.sf.jasperreports.engine.fill.TextMeasurer.measure(TextMeasurer.java:229)
	net.sf.jasperreports.engine.fill.JRFillTextElement.chopTextElement(JRFillTextElement.java:515)
	net.sf.jasperreports.engine.fill.JRFillTextField.prepare(JRFillTextField.java:514)
	net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:343)
	net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:311)
	net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:275)
	net.sf.jasperreports.engine.fill.JRVerticalFiller.fillBandNoOverflow(JRVerticalFiller.java:387)
	net.sf.jasperreports.engine.fill.JRVerticalFiller.fillPageHeader(JRVerticalFiller.java:351)
	net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:222)
	net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:128)
	net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:730)
	net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:632)
	net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:63)
	net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:402)
	net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:234)
	net.sf.jasperreports.engine.JasperRunManager.runReportToPdf(JasperRunManager.java:203)
	org.apache.jsp.cadastros.prod.rel.openReport2_jsp._jspService(openReport2_jsp.java:115)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.35 logs.
Apache Tomcat/6.0.35