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From "James Leigh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCLIENT-1299) FileNotFoundException on Cached Variant
Date Thu, 17 Jan 2013 16:30:23 GMT
James Leigh created HTTPCLIENT-1299:

             Summary: 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
         Environment: OpenJDK 64-Bit Server VM (6b24-1.11.5-0ubuntu1~12.04.1)
            Reporter: James Leigh

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

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:
	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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