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From "Jerome Boulon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5354) AdaptorId should be persistent even after an agent restart
Date Fri, 27 Feb 2009 17:21:12 GMT
AdaptorId should be persistent even after an agent restart

                 Key: HADOOP-5354
                 URL: https://issues.apache.org/jira/browse/HADOOP-5354
             Project: Hadoop Core
          Issue Type: Bug
          Components: contrib/chukwa
            Reporter: Jerome Boulon

In case of agent restart, an adaptor may not get the same adaptorId. 

1)The adaptorId is sent back to the remote application after the Add command.
Now, let suppose the agent dies and restarts. 
Each new adaptor created from the checkpoint will now have another adaptorId
If the remote application tries to stop/shutdown only using the adaptorId received in step
(1), the command may be sent to the wrong adaptor.

if the adaptorId in for example an MD5 of the command line we don't need to save any additional
information inside the checkpoint.
This will change the current API from int to String.

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