[jboss-jira] [JBoss JIRA] Created: (JBAS-7817) java.lang.IllegalArgumentException on JBoss 5.0.1

[jian jin (JIRA)]

java.lang.IllegalArgumentException on JBoss 5.0.1
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                 Key: JBAS-7817
                 URL: https://jira.jboss.org/jira/browse/JBAS-7817
             Project: JBoss Application Server
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Web (Tomcat) service
    Affects Versions: JBossAS-5.0.1.GA
         Environment: Windows Server 2008 + JBoss 5.1.0
            Reporter: jian jin
            Assignee: Remy Maucherat


The code works well on JBoss 4.2.3 and JBoss 4.0.5. After we deploy the same application on JBoss 5. We encounter this issue. The stacktrace  is:

java.lang.IllegalArgumentException
   at  java.nio.Buffer.position(Buffer.java:218) 
    at  org.apache.tomcat.util.buf.B2CConverter.convert(B2CConverter.java:84) 
    at  org.apache.catalina.connector.InputBuffer.realReadChars(InputBuffer.java:403) 
    at  org.apache.tomcat.util.buf.CharChunk.substract(CharChunk.java:383) 
    at  org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:416) 
    at  org.apache.catalina.connector.CoyoteReader.read(CoyoteReader.java:93) 
    at  com.filenet.bp8.api.util.Bp8XMLUtil.getDocumentFromReader(Bp8XMLUtil.java:92) 
    at  com.filenet.bp8.apps.server.servlet.Bp8ActionDispatcherServlet.doPost(Bp8ActionDispatcherServlet.java:67) 
    at  javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
    at  javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at  org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at  org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at  org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) 
    at  org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at  org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at  org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235) 
    at  org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at  org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190) 
    at  org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92) 
    at  org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126) 
    at  org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70) 
    at  org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at  org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at  org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) 
    at  org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at  org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330) 
    at  org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829) 
    at  org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601) 
    at  org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)


What we want to do is to get the content from HTTP Post request:
In the servlet's doPost method, we invoked another utility class's getDocumentFromReader(Reader r) method:

public static Document getDocumentFromReader(Reader r) throws IOException,SAXException {
        BufferedReader br = (BufferedReader) r;
        int i;
        StringBuffer sb = new StringBuffer();
        try {
            while ((i = br.read()) != -1)
                sb.append((char) i);




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