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https://issues.apache.org/jira/browse/HTTPCLIENT-1274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski resolved HTTPCLIENT-1274.
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Resolution: Fixed
Fixed by HTTPCLIENT-1276
> NullPointerException on 304 Not Modified response
> -------------------------------------------------
>
> Key: HTTPCLIENT-1274
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1274
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: Cache
> Affects Versions: Snapshot
> Reporter: Francois-Xavier Bonnet
> Fix For: 4.2.3
>
> Attachments: TestCachingExec.patch.txt
>
>
> When sending a conditional request (If-None-Match for example) and the
> backend responds with a 304 Not Modified, the response contains an HttpEntity
> but you get a NullPointerException whenever to try to call one of the methods
> :
> - org.apache.http.HttpEntity.getContent()
> - org.apache.http.HttpEntity.writeTo(OutputStream)
> I would expect getEntity() to return null if there is no entity in the
> response.
> As a workaround I can test on the contentLength before calling these methods
> and call EntityUtils.consume(entity) to get sure that the connection is
> released but this makes things more complicated.
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