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From Kin-Man Chung <Kin-Man.Ch...@Eng.Sun.COM>
Subject [5] IndexOutOfBoundsException from CharChunk
Date Wed, 08 Oct 2003 19:03:46 GMT
I am getting a sporadic IndexOutOfBoundsException and it seems to come from
org.apache.tomcat.util.buf.CharChunk.flushBuffer.  The trace is

Servlet.service() for servlet jsp threw exception
java.lang.IndexOutOfBoundsException
        at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:132)
        at java.io.OutputStreamWriter.write(OutputStreamWriter.java:191)
        at org.apache.tomcat.util.buf.WriteConvertor.write(C2BConverter.java:228
)
        at org.apache.tomcat.util.buf.C2BConverter.convert(C2BConverter.java:120
)
        at org.apache.coyote.tomcat5.OutputBuffer.realWriteChars(OutputBuffer.ja
va:606)
        at org.apache.tomcat.util.buf.CharChunk.flushBuffer(CharChunk.java:463)
        at org.apache.coyote.tomcat5.OutputBuffer.flush(OutputBuffer.java:357)
        at org.apache.coyote.tomcat5.CoyoteWriter.flush(CoyoteWriter.java:117)
        at org.apache.jasper.runtime.JspWriterImpl.flush(JspWriterImpl.java:203)
        at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary
.java:990)
...

In CharChunk, 

    public void flushBuffer()
        throws IOException
    {
        //assert out!=null
        if( out==null ) {
            throw new IOException( "Buffer overflow, no sink " + limit + " " +
                                   buff.length  );
        }
        out.realWriteChars( buff, start, end - start );
        end=start;
    }

when realWriteChars is called, the value for start is 0, end is 16384, and
buff.length is 8192, hence the exception.

Does anyone knows how end can go beyond 8192?  This only hapeens very
rarely, under heavy load.

-Kin-man





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