Could not load the following font

Could not load the following font

I have a problem that have been already asked but there is some specific
difference in my case.
Im supporting a web application (EJB 2, PosrgreSql 9.2.4, running on a
JBoss 4.2.3) that have an issue. Some times when we try to generate a
specific report we got this error:
javax.servlet.ServletException:
net.sf.jasperreports.engine.JRRuntimeException: Could not load the
following font : pdfFontName : DejaVu Sans pdfEncoding : Cp1252
isPdfEmbedded : false
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:523)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
stirq.scan.util.NoCacheFilter.doFilter(NoCacheFilter.java:38)
jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:118)
stirq.scan.util.TimeoutFilter.doFilter(TimeoutFilter.java:57)
stirq.scan.util.SecurityFilter.doFilter(SecurityFilter.java:82)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
I searched in many sites.
http://community.jaspersoft.com/questions/525505/could-not-load-following-font
Could not load the following font issue in iReport
JasperReports - font extensions does not work - can't find font while
exporting to PDF
(And others)
As suggested in many answer I am using font extension jar but still got
the issue.
There are two fields of a table in the application's database that can
contains html code. I found that the bug occurs when there is a tag in one
of those two fields or the two. Even if the specified font in this tag is
Arial the message I got is still concerning the font DejaVu Sans.
Every textfield of all my jrxml files are in font DejaVu Sans. When I
tested the preview mode of my report in IReport 4.1.1 every thing was
fine.
I deleted every tags of the two database fields containing html code for
an occurence that got the issue and it worked.
But the application is in production. As you can see I can't delete every
tags in the database.
Any help would be appreciated.
Thanks.