EmmyMiao87 opened a new pull request #1437: Resolve the problem of accidental 
pause in RoutineLoadJob
URL: https://github.com/apache/incubator-doris/pull/1437
 
 
   The issue is following:
   Request1:
     be aborts the txn.
     Attachment of txn is set.
     Attachment of txn is changed to null without lock of txn because the task 
has been aborted by fe.
   Request2:
     be abortes the txn again.
     Attachment of txn is set again.
   Request1:
     The attachment is not null so the job wants to find the task and commit it.
     The job could not find the task so it is paused.
   
   The attachment of txn is not changed in this commit.
   The new condition of committing task is that the task is in the job or not.

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