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From "Vasily Zakharov (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-3703) [classlib][archive][netbeans] GZIPInputStream throws IOException when feeding from the network
Date Mon, 23 Apr 2007 12:26:15 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-3703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490918
] 

Vasily Zakharov commented on HARMONY-3703:
------------------------------------------

I've tried on WinXP also.

Do you get SUCCESS message?

The last size changes with time, as the specified URL is a news strip, it's ok.

Do you use the latest build? I'm now doing update and full rebuild of Harmony to verify the
problem, could you please do the same?

Thank you!


> [classlib][archive][netbeans] GZIPInputStream throws IOException when feeding from the
network
> ----------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-3703
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3703
>             Project: Harmony
>          Issue Type: Bug
>          Components: App-Oriented Bug Reports, Classlib
>            Reporter: Vasily Zakharov
>
> When java.util.zip.GZIPInputStream is passed a stream constructed from a network URL,
it throws IOException (Crc mismatch) at end-of-stream. If the same content is fed through
local file URL, the problem doesn't occur. It looks like some end-of-stream detection problem
is in place, or a race condition.
> public class Test {
>     public static void main(String args[]) throws Exception {
>         byte[] buffer = new byte[0x100000];
>         String url =
>                 "http://www.netbeans.org/updates/55_1.20_.xml.gz";
>                 //"file:55_1.20_.xml.gz";
>         java.io.InputStream stream = new java.util.zip.GZIPInputStream(new java.net.URL(url).openStream());
>         int length = 0, num = 0;
>         while (num >= 0) {
>             length += num;
>             System.out.println(length);
>             num = stream.read(buffer, length, (buffer.length - length));
>         }
>     }
> }
> $ Ri/bin/java -Dhttp.proxyHost=$PROXY_HOST -Dhttp.proxyPort=$PROXY_PORT Test
> 0
> 777
> 3392
> ...
> 386431
> SUCCESS
> $ HY/bin/java -Dhttp.proxyHost=$PROXY_HOST -Dhttp.proxyPort=$PROXY_PORT Test
> 0
> 777
> 3392
> ...
> 386431
> Exception in thread "main" java.io.IOException: Crc mismatch
>         at java.util.zip.GZIPInputStream.read(GZIPInputStream.java:166)
>         at Test.main(Test.java:13)
> On IBM VM, this result is stable. On DRLVM, the test sometimes (rarely) passes, and sometimes
(also rarely) another exception occurs instead of IOException:
> Uncaught exception in main:
> java.lang.ArrayIndexOutOfBoundsException: bad arrayCopy
>         at java.lang.VMMemoryManager.arrayCopy(VMMemoryManager.java)
>         at java.lang.System.arraycopy(System.java:86)
>         at java.util.zip.GZIPInputStream.read(GZIPInputStream.java:161)
>         at Test.main(Test.java:13)
> If content is previously downloaded (wget http://www.netbeans.org/updates/55_1.20_.xml.gz)
and local file URL is used instead of network URL (comment line 5, uncomment line 6), output
on Harmony becomes identical to output on RI.
> This problem was discovered while trying to run NetBeans on Harmony. 
> Issue HARMONY-3702 was also filed while investigating this one.

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