Tomcat и CharConversionException

При разработке сервлета под Tomcat столкнулся со следующей проблемой и долго мучился:

HTTP Status 500 -

---

type Exception report

message

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

exception

java.io.CharConversionException: Not an ISO 8859-1 character: з
javax.servlet.ServletOutputStream.print(ServletOutputStream.java:89)
dating.servlet.TestServlet.service(TestServlet.java:77)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.

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Apache Tomcat/6.0.20