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Posted to dev@hc.apache.org by "Olivier Lafontaine (JIRA)" <ji...@apache.org> on 2016/01/26 19:05:39 UTC

[jira] [Updated] (HTTPCLIENT-1715) NTLMEngineImpl.Type1Message not thread safe but declared as a constant

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-1715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Olivier Lafontaine updated HTTPCLIENT-1715:
-------------------------------------------
    Summary: NTLMEngineImpl.Type1Message not thread safe but declared as a constant  (was: NTLMEngineImpl.Type1Message not thread safe but declared as a singleton)

> NTLMEngineImpl.Type1Message not thread safe but declared as a constant
> ----------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-1715
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1715
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 4.5.1
>            Reporter: Olivier Lafontaine
>
> {{NTLMEngineImpl}} declares a {{static final}} member named {{TYPE_1_MESSAGE}} of type {{Type1Message}}. Members of {{Type1Message}} are final and do not change, but that is not the case for members of its superclass {{NTLMMessage}}.
> Whenever the method {{NTLMEngineImpl#getType1Message(String, String)}} is called, the method {{NTLMMessage#getResponse()}} get called on the {{TYPE_1_MESSAGE}} instance and this modifies the following members of {{NTLMMessage}}:
> * messageContents
> * currentOutputPosition
> This is not thread safe and we get exceptions as seen in HTTPCLIENT-1686.
> My guess is that the computed response string should be kept in a constant instead of a {{Type1Message}} instance.



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