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From "Clinton Nielsen (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (HTTPCLIENT-1245) org.apache.http.impl.client.cache.memcached.SHA256KeyHashingScheme use of MessageDigest should be synchronized
Date Thu, 04 Oct 2012 21:31:47 GMT

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-1245?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Clinton Nielsen closed HTTPCLIENT-1245.
---------------------------------------

    Resolution: Not A Problem

Yeah, this is definitely going to require more digging around on my part.
I believe that the synchronization is not necessary.

Sorry for the trouble.
                
> org.apache.http.impl.client.cache.memcached.SHA256KeyHashingScheme use of MessageDigest
should be synchronized
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-1245
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1245
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: Cache
>    Affects Versions: 4.2.1
>            Reporter: Clinton Nielsen
>
> Function:
>     public String hash(String key) {
>         MessageDigest md = getDigest();
>         md.update(key.getBytes());
>         return Hex.encodeHexString(md.digest());
>     }
> Should be rewritten to synchronize access to the MessageDigest object:
> 	public String hash(String key) {
>         MessageDigest md = getDigest();
>         byte[] digest = null;
>         synchronized(md) {
>         	md.update(key.getBytes());
>         	digest = md.digest();
>         }
>         return Hex.encodeHexString(digest);
>     }

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