[GitHub] [incubator-pegasus] empiredan opened a new issue, #1449: Fail to create a table due to ERR_BUSY_CREATING

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

empiredan opened a new issue, #1449:
URL: https://github.com/apache/incubator-pegasus/issues/1449

   ## Problem
   
   While creating table by pegasus shell (pegasus version 2.0), `ERR_BUSY_CREATING` happened frequently as below:
   
   ![image](https://user-images.githubusercontent.com/743379/232482325-f4479816-e94a-43eb-a11b-88f1578441af.png)
   
   ## Analysis
   
   Pegasus shell requests for creating table by DDL client as follow:
   
   ![image](https://user-images.githubusercontent.com/743379/232485119-1f4acaae-60d0-4b9f-be1a-f5f1412aef05.png)
   
   It will attempt at most 3 times:
   
   ![image](https://user-images.githubusercontent.com/743379/232485276-53ce55ff-0a16-498f-b956-15a26c0980f0.png)
   
   ![image](https://user-images.githubusercontent.com/743379/232483771-ceb86d40-243b-406a-aa4f-d1e85b80dfdb.png)
   
   Without receiving any response from meta server,  DDL client will wait at most 10 seconds, then it will timeout and fail:
   
   ![image](https://user-images.githubusercontent.com/743379/232484656-60c8c1d6-e9a6-4c3c-9569-639c7da90d53.png)
   
   ![image](https://user-images.githubusercontent.com/743379/232492642-45feaa47-f1e1-43ab-bdf5-91c2a7dc1db9.png)
   
   Based on the above analysis, the process could be described as follows:
   
   1. Pegasus shell launched request for creating a table;
   2. However, after 10 seconds the meta server still did not respond with any message since the table had not been created successfully in meta server;
   3. DDL client chose to attempt 2nd request for creating a table immediately;
   4. Unfortunately, the table had not been created, DDL client received `ERR_BUSY_CREATING` from meta server;
   5. DDL client attempted 3rd request and received `ERR_BUSY_CREATING`;
   6. DDL client had attempted 3 times, thus failed.
   
   This process could be also learned from logs of meta server:
   
   ![image](https://user-images.githubusercontent.com/743379/232498016-2451f7a9-e655-4652-b75e-85c76702187c.png)
   
   ![image](https://user-images.githubusercontent.com/743379/232498179-77831c80-ef6d-41da-8d93-898705ac3faa.png)
   
   ![image](https://user-images.githubusercontent.com/743379/232499319-331d27d1-2b9d-4cfb-b79a-9311c5c97c1b.png)
   
   ![image](https://user-images.githubusercontent.com/743379/232499433-5da8b81c-fc68-4acc-9850-7b8b10d22568.png)
   
   ![image](https://user-images.githubusercontent.com/743379/232499783-da343bad-92f1-42ee-b2ad-80073c097e43.png)
   
   


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[GitHub] [incubator-pegasus] acelyc111 closed issue #1449: Fail to create a table due to ERR_BUSY_CREATING

["acelyc111 (via GitHub)" <gi...@apache.org>]

acelyc111 closed issue #1449: Fail to create a table due to ERR_BUSY_CREATING
URL: https://github.com/apache/incubator-pegasus/issues/1449


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