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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4434) Improve log rotation and reduce communication between agent and logging process, make agent more fault tolerant
Date Thu, 16 Oct 2008 21:46:46 GMT
Improve log rotation and reduce communication between agent and logging process, make agent
more fault tolerant
---------------------------------------------------------------------------------------------------------------

                 Key: HADOOP-4434
                 URL: https://issues.apache.org/jira/browse/HADOOP-4434
             Project: Hadoop Core
          Issue Type: Improvement
         Environment: Redhat Enterprise Linux 4.5, Java 6
            Reporter: Eric Yang


- Chukwa Agent does not handle rotated log correctly.  The current design requires the logging
process to pause the agent, rotate the log, then resume the log streaming.  The three communication
between the running process and chukwa agent could become a problem when either or one of
the process is down.  The implementation should be able to detect log rotation in the chukwa
agent.
- Chukwa Agent should detect and prevent the same log being streamed more than once.
- Chukwa Agent should synchronize data streaming addition when picking up the check point
file.


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