java.lang.IllegalArgumentException at java.nio.Buffer.limit

[Terence M. Bandoian]

On 8/7/2014 10:04 AM, John Smith wrote:

TC 7.0.54 / RHEL 6 / JDK 1.7.0_60

I'm getting a pretty consistent error in my logs that started showing up
recently. I use logback and have a servlet catch all 500 errors and log
them. The error seems to be associated with one servlet that writes XML
output.

Two changes I made recently were implement SSL for one subdirectory on the
webapp, and removing redirects in IPTables to the HWLB. I can't really
think of any other code level changes that might have caused the change in
behavior. Please let me know if you need more information. Any thoughts?

The writeXML method is:

protected void writeXML(HttpServletResponse res, String xml) throws
IOException {
         res.setContentType("text/xml");
         PrintWriter out = res.getWriter();
         out.write(xml);
         out.close();
}


The stacktrace almost always looks like this:
_____________________________________
14:18:59.617 [http-nio-8080-exec-45] ERROR c.m.SiteExceptionHandlerServlet
- Stacktrace was: java.lang.IllegalArgumentException
at java.nio.Buffer.limit(Buffer.java:267)
at org.apache.tomcat.util.buf.C2BConverter.convert(C2BConverter.java:85)
at
org.apache.catalina.connector.OutputBuffer.realWriteChars(OutputBuffer.java:481)
at org.apache.tomcat.util.buf.CharChunk.flushBuffer(CharChunk.java:464)
at org.apache.tomcat.util.buf.CharChunk.append(CharChunk.java:384)
at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:554)
at org.apache.catalina.connector.CoyoteWriter.write(CoyoteWriter.java:174)
at org.apache.catalina.connector.CoyoteWriter.write(CoyoteWriter.java:184)
at com.mysite.AbstractServlet.writeXML(AbstractServlet.java:182)
at com.mysite.level.GetLevelServlet.getAllAsXML(GetLevelServlet.java:82)
at com.mysite.level.GetLevelServlet.manageActions(GetLevelServlet.java:33)
at com.mysite.AbstractServlet.doPost(AbstractServlet.java:52)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
...
__________________________

Although there are variations like:

Stacktrace was: java.lang.IllegalArgumentException
at java.nio.Buffer.position(Buffer.java:236)
at sun.nio.cs.ISO_8859_1$Encoder.encodeArrayLoop(ISO_8859_1.java:179)
at sun.nio.cs.ISO_8859_1$Encoder.encodeLoop(ISO_8859_1.java:212)
at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:561)
at org.apache.tomcat.util.buf.C2BConverter.convert(C2BConverter.java:108)
at
org.apache.catalina.connector.OutputBuffer.realWriteChars(OutputBuffer.java:481)
at org.apache.tomcat.util.buf.CharChunk.flushBuffer(CharChunk.java:464)
at org.apache.tomcat.util.buf.CharChunk.append(CharChunk.java:384)
at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:554)
at org.apache.catalina.connector.CoyoteWriter.write(CoyoteWriter.java:174)
at org.apache.catalina.connector.CoyoteWriter.write(CoyoteWriter.java:184)
at com.mysite.AbstractServlet.writeXML(AbstractServlet.java:182)

___________________

What's on line 182 of AbstractServlet.java?

-Terence Bandoian


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