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From "Bill Barker" <wbar...@wilshire.com>
Subject Re: Tomcat 5; can't set response bufferSize < 8K
Date Tue, 10 Aug 2004 22:41:42 GMT
<spec-quote version="servlet 2.4" section="14.2.22">
Sets the preferred buffer size for the body of the response. The servlet
container will use a buffer at least as large as the size requested. The
actual buffer size used can be found using getBufferSize.
</spec-quote>

----- Original Message -----
From: "Lenny Marks" <lenny@aps.org>
To: <tomcat-dev@jakarta.apache.org>
Sent: Tuesday, August 10, 2004 3:31 PM
Subject: Tomcat 5; can't set response bufferSize < 8K


> It seams it is impossible to set the response buffer
> size(response.setBufferSize)  with anything less than 8K. That is,
> response.getBufferSize() still returns 8K. Anything over 8K does work.
> I downloaded the source and pinned it down to the following:
>
> In org.apache.coyote.tomcat5.CoyoteResponse an outputBuffer is
> initialized with 'new OutputBuffer()'.  The default constructor of
> OutputBuffer then internally creates a new ByteChunk with a 'limit' of
> DEFAULT_BUFFER_SIZE, which is 8K.
>
> In CoyoteResponse setBufferSize is:
>
> public void setBufferSize(int size) {
>
>          if (isCommitted() || !outputBuffer.isNew())
>              throw new IllegalStateException
>                  (sm.getString("coyoteResponse.setBufferSize.ise"));
>
>          outputBuffer.setBufferSize(size);
>   }
>
> and OutputBuffer.setBufferSize is:
>
>   public void setBufferSize(int size) {
>          if (size > bb.getLimit()) {// ??????
>              bb.setLimit(size);
>          }
>     }
>
> The result is that the buffer size can never be set less than
> OutputBuffer.DEFAULT_BUFFER_SIZE or 8K.
>
> Is there any good reason for this? The question marks make me wonder.
> For now I just changed the DEFAULT_BUFFER_SIZE to 1K. Also, I'm not
> sure how this is related to bufferSize and socketBuffer for the HTTP1.1
> Connector. I sounds like bufferSize is related to reading the request.
> Should it be that socketBuffer is the default bufferSize for a response?
>
> BTW, I had done a lot of searching on this issue. I didn't find any
> related bugs or postings on the Tomcat mailing lists. I had come across
> one or two postings on various other lists from people having the same
> problem, but the threads were never answered. I myself, am new to this
> list.
>
> Thanks in advance for any advice,
> -lenny
>
>
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