Harish Jaiprakash created TEZ-4028:
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             Summary: Events not visible from proto history logging for s3a 
filesystem until dag completes.
                 Key: TEZ-4028
                 URL: https://issues.apache.org/jira/browse/TEZ-4028
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Harish Jaiprakash
            Assignee: Harish Jaiprakash


The events are not visible in the files because  s3 filesystem
* flush writes to local disk and only upload/commit to s3 on close.
* does not support append

As an initial fix we log the dag submitted, initialized and started events into 
a file and these can be read to get the dag plan, config from the AM. The 
counters are anyways not available until the dag completes.

The in-progress information cannot be read, this can be obtained from the AM 
once we have the above events.



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