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https://issues.apache.org/jira/browse/COCOON-2139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Naumov updated COCOON-2139:
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Attachment: test.zip
This is a sample setup to reproduce the issue.
rawdata.xml is the initial data file, the specific behavior seems to depend on
it's size and structure.
sitemap defines two pipelines:
testData - cached pipeline that serves rawdata.xml
result - XInclude operation to include cocoon:/testData result and then apply
the filter to show the effect.
The filtering looks for elements in the result that have non-numeric values,
since all the attributes in the source file are numeric.
Put the files into a cocoon instance (e.g. /test directory at the top level).
then open URL http://<your-server>:<port>/test/result
First time (when the cache is empty), it should return a single empty
<filteredResult/> tag.
This is the expected behavior.
Then refresh the page in the browser to hit it a second time. At this time
several <stat> elements are returned.
Check their attributes - some of them will have random non-numeric values.
Once you clear the cache, you will get a single empty <filteredResult/> tag
first time again, and some corrupted XML after that.
> Corrupted XML content with cocoon: protocol and caching
> -------------------------------------------------------
>
> Key: COCOON-2139
> URL: https://issues.apache.org/jira/browse/COCOON-2139
> Project: Cocoon
> Issue Type: Bug
> Components: * Cocoon Core
> Affects Versions: 2.1.9
> Reporter: Igor Naumov
> Attachments: test.zip
>
>
> I ran into a very tricky and frustrating issue with caching pipelines using
> cocoon: protocol.
> It appears that when a result of a pipeline is retrieved from cache, the XML
> is "corrupted" in a strange way (e.g. attributes have random values they are
> not expected to have).
> I am using Cocoon 2.1.9 under Jetty (local server), with Saxon 8. Other
> components used in the sample setup are ExpiresCachingProcessingPipeline and
> XInclude.
> The test case is set up as follows (I will attach all the files or provide a
> link to download):
> 1. A caching pipeline (using ExpiresCachingProcessingPipeline) returns a
> fairly large XML document straight from a local file.
> 2. Another pipeline (noncaching) is using XInclude to embed a result of the
> pipeline #1 (through cocoon: URL) into the result document.
> 3. A simple XSL filter is applied at the end of pipeline #2 to show the
> damaged XML elements.
> When the pipeline #2 is called for the first time, everything works ok. At
> this time pipeline #1 result is cached.
> When the pipeline #2 is called for the second time, the XML returned by
> cocoon: URL is different from the first call - some attributes are changed
> with a random data which seems to come form other places in the stream (like
> element names).
> XInclude may not be the primary suspect, I tried CInclude with similar
> effects.
> Disabling caching on pipeline #1 seems to eliminate the problem, changing
> cocoon: protocol to http: seems to fix it as well.
> The most frustrating part is that although the bug can be reproduced reliably
> with particular sitemap and source files, the actual effect seems to depend
> on the source XML (less likely to occur with smaller initial data sets).
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