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From "Olivier Lafontaine (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCLIENT-1715) NTLMEngineImpl.Type1Message not thread safe but declared as a singleton
Date Tue, 26 Jan 2016 18:02:39 GMT
Olivier Lafontaine created HTTPCLIENT-1715:
----------------------------------------------

             Summary: NTLMEngineImpl.Type1Message not thread safe but declared as a singleton
                 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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