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shardingsphere
Distributed SQL transaction & query engine for data sharding, scaling, encryption, and more - on any database.
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The configuration items have 108 pieces of real tables in a database. According to the configuration of maxConnectionsizeperquery=50, ShardingSphere-JDBC uses the connection limit mode, divides the query requests into three groups, and merges the results with in-memory. As a result, 36 database connections are required for one query. But the maxActive configured by the druid thread pool is set to 20, resulting in a deadlock.
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