Re: [PR] [fix](flink) Fix scanner be cancelled early on pipelineX [doris]

["wanggx (via GitHub)" <gi...@apache.org>]

wanggx commented on PR #42421:
URL: https://github.com/apache/doris/pull/42421#issuecomment-3400998480

   > 1. A query_id is randomly generated to replace t_query_plan_info.query_id. external query does not need to report anything to FE, so the query_id can be changed.
   >    Otherwise, multiple independent concurrent open tablet scanners have the same query_id. when one of the scanners ends, the other scanners will be canceled through FragmentMgr.cancel(query_id).
   > 2. (query_id, fragment_id) is executed only on one BE, locks _pipeline_map.
   > 3. External query (flink/spark read tablets) not need to report to FE.
   
   according to your describe，when multiple independent concurrent open tablet scanners ，must cause an error，why has this problem，I cannot understand it .
   
   https://doris-forum.org.cn/questions/D15j4/tong-guo-de-fang-shi-fang-wen-biao-ti-shi-bao-cuo


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