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Date: Thu, 10 Aug 2006 16:31:49 +0800
From: "Jimmy, Jing Lv" <firepure@gmail.com>
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To: harmony-dev@incubator.apache.org
Subject: Re: Exceptions found while running servlet...
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Jimmy, Jing Lv wrote:
> Martin Cordova wrote:
>> Is it OK to send this type of feedback to the list? please let me know
>> if not, and what subject conventions should I use (is there a link
>> about this?). I am not a Harmony developer, just a new user, I can
>> only provide feedback from my tests.
>>
> 
> Welcome! I think everyone here is eager to see Harmony works with some 
> real projects well :)
> 
>> ----
>>
>> I am running a small webapp, using Winstone servlet engine and IBM JDK
>> 1.4.2 SP4 on WinXP SP2. Runs fine. I switched to Harmony JRE (aug-4),
>> and found these exceptions:
>>
>> 1.- I see this error while using servlet includes and also at the end
>> of some pages:
>>
>> java.lang.ArrayIndexOutOfBoundsException: 0..0 at
>> org.apache.harmony.luni.platform.OSNetworkSystem.sendStreamImpl(OSNetworkSystem.java) 
>>
>> at 
>> org.apache.harmony.luni.platform.OSNetworkSystem.sendStream(OSNetworkSystem.java:194) 
>>
>> at 
>> org.apache.harmony.luni.net.PlainSocketImpl.write(PlainSocketImpl.java:647) 
>>
>> at 
>> org.apache.harmony.luni.net.SocketOutputStream.write(SocketOutputStream.java:89) 
>>
>> at winstone.WinstoneOutputStream.commit(WinstoneOutputStream.java:152)
>> at winstone.WinstoneOutputStream.flush(WinstoneOutputStream.java:189)
>> at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:176) at
>> java.io.OutputStreamWriter.convert(OutputStreamWriter.java:240) at
>> java.io.OutputStreamWriter.write(OutputStreamWriter.java:228) at
>> java.io.PrintWriter.doWrite(PrintWriter.java:640) at
>> java.io.PrintWriter.write(PrintWriter.java:622) at
>> winstone.WinstoneResponseWriter.write(WinstoneResponseWriter.java:45)
>> at java.io.PrintWriter.write(PrintWriter.java:607) at
>> java.io.PrintWriter.write(PrintWriter.java:657) at
>> java.io.PrintWriter.print(PrintWriter.java:455) at
>>
> 
> I've looked into this, I feel puzzled, the stack trace shows that:
> org.apache.harmony.luni.net.SocketOutputStream.write(SocketOutputStream.java:89) 
> 
> but there are checks for overflow:
> if (0 <= offset && offset <= buffer.length && 0 <= count
>             && count <= buffer.length - offset){
> ...
> }

Oops, this is certainly wrong: "offset <= buffer.length","count <= 
buffer.length - offset", the equal mark should be omitted.

I'll raise a JIRA for this.

I'm not sure if this is the cause of the problem. So would you please 
try again if I correct it? :)

> So can you give more information? e.g, what are PrintWriter try to write 
> that time? :)
> 
>> 2.- Trying to generate charts using JFreeCharts (server-side):
>>
>> java.lang.NoClassDefFoundError: org/apache/harmony/awt/gl/ImageSurface
>>     at 
>> java.awt.image.BufferedImage.createImageSurface(BufferedImage.java:659)
>>     at java.awt.image.BufferedImage.<init>(BufferedImage.java:352)
>>     at 
>> org.jfree.chart.JFreeChart.createBufferedImage(JFreeChart.java:1211)
>>     at 
>> org.jfree.chart.JFreeChart.createBufferedImage(JFreeChart.java:1193)
>>     at 
>> org.jfree.chart.JFreeChart.createBufferedImage(JFreeChart.java:1178)...
>>
>> The JDBC related code is running fine, performance also looks very good.
>>
>> I will contact Winstone developer to see if he can help in some way to
>> identify the problem. He already helped me a few months ago to help
>> identify a bug in GNU Classpath server socket API.
>>
>> Regards,
>> Martin
> 
> 


-- 

Best Regards!

Jimmy, Jing Lv
China Software Development Lab, IBM

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