TangSiyang2001 opened a new pull request, #18180:
URL: https://github.com/apache/doris/pull/18180

   # Proposed changes
   
   Issue Number: close #16300
   
   ## Problem summary
   
   Found that RPC timeout is too short that RPC client will close before 
execute result is return.
   
   Therefor, use a coefficient to prolong the RPC client timeout, so that it 
can wait for the real cause to be recieved.
   
   Before:
   ```
   mysql> insert into lineorder select * from lineorder limit 10000000;
   ERROR 1105 (HY000): ForwardToMasterException, msg: 
org.apache.doris.qe.MasterOpExecutor$ForwardToMasterException: Forward 
statement 21 to Master TNetworkAddress(hostname:127.0.0.1, port:9020) failed, 
cause: Unknown exception
   ```
   
   After:
   ```
   mysql> select count(*) from customer;
   +----------+
   | count(*) |
   +----------+
   | 19200000 |
   +----------+
   1 row in set (0.14 sec)
   
   mysql> set query_timeout=1;
   Query OK, 0 rows affected (0.00 sec)
   
   mysql> set insert_timeout=1;
   Query OK, 0 rows affected (0.00 sec)
   
   mysql> insert into customer select * from customer limit 10000000;
   ERROR 1105 (HY000): errCode = 2, detailMessage = Execute timeout
   
   mysql> select * from customer;
   ERROR 1105 (HY000): errCode = 2, detailMessage = query timeout
   
   mysql> set forward_to_master=true;
   Query OK, 0 rows affected (0.00 sec)
   
   mysql> insert into customer select * from customer limit 10000000;
   ERROR 1105 (HY000): errCode = 2, detailMessage = Execute timeout
   
   mysql> select * from customer;
   ERROR 1105 (HY000): errCode = 2, detailMessage = query timeout
   ```
   ## Checklist(Required)
   
   * [ ] Does it affect the original behavior
   * [ ] Has unit tests been added
   * [ ] Has document been added or modified
   * [ ] Does it need to update dependencies
   * [x] Is this PR support rollback (If NO, please explain WHY)
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[[email protected]](mailto:[email protected]) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   
   


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