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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HTTPCLIENT-1299) FileNotFoundException on Cached Variant
Date Wed, 17 Apr 2013 10:21:16 GMT

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-1299?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Oleg Kalnichevski resolved HTTPCLIENT-1299.
-------------------------------------------

       Resolution: Fixed
    Fix Version/s: 4.2.5

Patch committed to SVN trunk and 4.2.x branch.

Oleg
                
> FileNotFoundException on Cached Variant
> ---------------------------------------
>
>                 Key: HTTPCLIENT-1299
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1299
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: Cache
>    Affects Versions: 4.2.3, 4.2.4, 4.3 Beta1
>         Environment: OpenJDK 64-Bit Server VM (6b24-1.11.5-0ubuntu1~12.04.1)
>            Reporter: James Leigh
>              Labels: regression
>             Fix For: 4.2.5
>
>         Attachments: HTTPCLIENT-1299.patch
>
>
> This bug was introduced in org.apache.http.impl.client.cache.BasicHttpCache in 4.2.3.
> cacheAndReturnResponse takes the response and passes it to storeInCache. It then calls
generateResponse with the *same* response resource. The problem is that storeInCache passes
the resource to doGetUpdatedParentEntry, which makes a copy and *deletes* the resource it
was passed (oldResource).
> This did not occur in 4.2.2 because in 4.2.2 doGetUpdatedParentEntry did not delete the
resource. If the resource is being deleted after it is copied in 4.2.3, then it must not be
used to generateResponse.
> Here is a stack trace with line numbers.
> 	BasicHttpCache.doGetUpdatedParentEntry(String, HttpCacheEntry, HttpCacheEntry, String,
String) line: 202	
> 	BasicHttpCache$1.update(HttpCacheEntry) line: 119	
> 	ManagedHttpCacheStorage.updateEntry(String, HttpCacheUpdateCallback) line: 134	
> 	BasicHttpCache.storeVariantEntry(HttpHost, HttpRequest, HttpCacheEntry) line: 128	
> 	BasicHttpCache.storeInCache(HttpHost, HttpRequest, HttpCacheEntry) line: 96	
> 	BasicHttpCache.cacheAndReturnResponse(HttpHost, HttpRequest, HttpResponse, Date, Date)
line: 265	
> 	CachingHttpClient.handleBackendResponse(HttpHost, HttpRequest, Date, Date, HttpResponse)
line: 919	
> 	CachingHttpClient.callBackend(HttpHost, HttpRequest, HttpContext) line: 731	
> 	CachingHttpClient.handleCacheMiss(HttpHost, HttpRequest, HttpContext) line: 510	
> 	CachingHttpClient.execute(HttpHost, HttpRequest, HttpContext) line: 436	

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