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Posted to notifications@shardingsphere.apache.org by "strongduanmu (via GitHub)" <gi...@apache.org> on 2024/03/22 06:13:19 UTC

[I] Lost connection exceptions occur when I execute select system tables query in Proxy without any storage units [shardingsphere]

strongduanmu opened a new issue, #30603:
URL: https://github.com/apache/shardingsphere/issues/30603

   ## Bug Report
   
   ### Which version of ShardingSphere did you use?
   
   c6286ee
   
   ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
   
   ShardingSphere-Proxy
   
   ### Expected behavior
   
   Return empty result when execute select system tables query in Proxy without any storage units
   
   ### Actual behavior
   
   <img width="867" alt="image" src="https://github.com/apache/shardingsphere/assets/10829171/3236426b-942d-48d1-8335-0cdaaadaf68b">
   
   <img width="1604" alt="image" src="https://github.com/apache/shardingsphere/assets/10829171/d9838992-6063-4481-ac08-792a509fc7db">
   
   ### Reason analyze (If you can)
   
   QueryResultMetaData return empty columns metadata, this causes a MySQL protocol error.
   
   <img width="1353" alt="image" src="https://github.com/apache/shardingsphere/assets/10829171/53957070-77be-467a-bbb9-42b5731c3b38">
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.
   
   1. config server.yaml first.
   
   ```yaml
   mode:
     type: Cluster
     repository:
       type: ZooKeeper
       props:
         namespace: governance_ds_os_1122
         server-lists: localhost:2181
         retryIntervalMilliseconds: 500
         timeToLiveSeconds: 60
         maxRetries: 3
         operationTimeoutMilliseconds: 500
   
   authority:
     users:
       - user: root@%
         password: root
       - user: sharding
         password: sharding
     privilege:
       type: ALL_PERMITTED
   
   transaction:
     defaultType: XA
     providerType: Atomikos
   
   sqlParser:
     sqlStatementCache:
       initialCapacity: 2000
       maximumSize: 65535
     parseTreeCache:
       initialCapacity: 128
       maximumSize: 1024
   
   logging:
     loggers:
     - loggerName: org.apache.shardingsphere
       additivity: true
       level: DEBUG
       props:
         enable: true
   
   sqlFederation:
     sqlFederationEnabled: false
     executionPlanCache:
       initialCapacity: 2000
       maximumSize: 65535
   
   props:
     system-log-level: DEBUG
     max-connections-size-per-query: 1
     kernel-executor-size: 16  # Infinite by default.
     proxy-frontend-flush-threshold: 128  # The default value is 128.
     # sql-show is the same as props in logger ShardingSphere-SQL, and its priority is lower than logging rule
     sql-show: false
     check-table-metadata-enabled: false
       # Proxy backend query fetch size. A larger value may increase the memory usage of ShardingSphere Proxy.
       # The default value is -1, which means set the minimum value for different JDBC drivers.
     proxy-backend-query-fetch-size: -1
     proxy-frontend-executor-size: 0 # Proxy frontend executor size. The default value is 0, which means let Netty decide.
     proxy-frontend-max-connections: 0 # Less than or equal to 0 means no limitation.
     proxy-default-port: 3307 # Proxy default port.
     proxy-netty-backlog: 1024 # Proxy netty backlog.
     cdc-server-port: 33071 # CDC server port
     proxy-frontend-ssl-enabled: false
     proxy-frontend-ssl-cipher: ''
     proxy-frontend-ssl-version: TLSv1.2,TLSv1.3
     proxy-meta-data-collector-enabled: true
   ```
   
   2. Then run Proxy and execute `SHOW DATABASE`, `SHOW TABLES`, `SELECT * FROM mysql.columns_priv` sqls, you will get the exception.
   
   ### Example codes for reproduce this issue (such as a github link).
   


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Re: [I] Lost connection exceptions occur when I execute select system tables query in Proxy without any storage units [shardingsphere]

Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #30603:
URL: https://github.com/apache/shardingsphere/issues/30603#issuecomment-2073351551

   There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.


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Re: [I] Lost connection exceptions occur when I execute select system tables query in Proxy without any storage units [shardingsphere]

Posted by "strongduanmu (via GitHub)" <gi...@apache.org>.
strongduanmu commented on issue #30603:
URL: https://github.com/apache/shardingsphere/issues/30603#issuecomment-2014441541

   In addition to MySQL, we also need to pay attention to whether PG and OG are processed correctly.


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