wangleigithub opened a new issue #8517: URL: https://github.com/apache/shardingsphere/issues/8517
## Bug Report **For English only**, other languages will not accept. Before report a bug, make sure you have: - Searched open and closed [GitHub issues](https://github.com/apache/shardingsphere/issues). - Read documentation: [ShardingSphere Doc](https://shardingsphere.apache.org/document/current/en/overview). Please pay attention on issues you submitted, because we maybe need more details. If no response anymore and we cannot reproduce it on current information, we will **close it**. Please answer these questions before submitting your issue. Thanks! ### Which version of ShardingSphere did you use? 5.0.0-alpha ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy? ss-proxy ### Expected behavior ### Actual behavior when proxy query a large table with limit will cause a oom ### Reason analyze (If you can) ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc. I have a sharding table , the config ： rules: - !SHARDING tables: z_f_woman: actualDataNodes: ds_${0..2}.z_f_woman_${0..8} databaseStrategy: standard: shardingColumn: w_id shardingAlgorithmName: ds_inline_z_f_woman tableStrategy: standard: shardingColumn: w_id shardingAlgorithmName: z_f_woman_inline keyGenerateStrategy: column: w_id keyGeneratorName: snowflake defaultTableStrategy: none: shardingAlgorithms: ds_inline_z_f_woman: type: INLINE props: algorithm-expression: ds_$->{Long.valueOf(w_id) % 3} z_f_woman_inline: type: INLINE props: algorithm-expression: z_f_woman_$->{Long.valueOf(w_id) % 9} my sql : select ID, W_ID, F_NO, IDCARD, NAME, SEX, MARRYID, NATIONID, BIRTHDAY, CENSUSID, EDUID, RELATIONID, SINGLE, CENSUSCODE, CENSUSADDR, CENSUS_DNO, ADDRCODE, ADDRESS, ADDRDOORNO, OCCUPAID, JOBADDR, COMPANYID, SERVERID, TEL, CAREDATE, CARE_ID, CARDDATE, FLOWID, FLOWSTATE, ADDCODE, PT_ID, REMARKS, LOGOUTID, LOGOUTDATE, IN_DATE, LEAVE_DATE, OUT_DATE, BACK_DATE, FAMILY_INFO, FLOW_REASON, CONTRAID, NOWCONDATE, H_PID, H_NAME, H_IDCARD, M_ID, M_NAME, M_IDCARD, F_ID, F_NAME, F_IDCARD, FMARRYDATE, LMARRYDATE, KIDSNUM, BOYSNUM, STATISTID, ISADDRESSINTO, ISCENSUSINTO, SOURCEINFO, ADDTIME, ADDBY, ADDIP, UPDATETIME, UPDATEBY, UPDATEIP, VERIFYDATE from z_f_woman LIMIT 0,721690 exception: java.sql.SQLException: Java heap space at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122) at com.mysql.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:764) at com.mysql.cj.jdbc.StatementImpl.execute(StatementImpl.java:781) at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:103) at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) at org.apache.shardingsphere.proxy.backend.communication.jdbc.statement.accessor.impl.StatementAccessor.execute(StatementAccessor.java:43) at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.ProxySQLExecutorCallback.executeSQL(ProxySQLExecutorCallback.java:84) at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.ProxySQLExecutorCallback.executeSQL(ProxySQLExecutorCallback.java:79) at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.ProxySQLExecutorCallback.executeSQL(ProxySQLExecutorCallback.java:48) at org.apache.shardingsphere.infra.executor.sql.resourced.jdbc.executor.impl.DefaultSQLExecutorCallback.execute0(DefaultSQLExecutorCallback.java:75) at org.apache.shardingsphere.infra.executor.sql.resourced.jdbc.executor.impl.DefaultSQLExecutorCallback.execute(DefaultSQLExecutorCallback.java:57) at org.apache.shardingsphere.infra.executor.kernel.ExecutorKernel.syncExecute(ExecutorKernel.java:99) at org.apache.shardingsphere.infra.executor.kernel.ExecutorKernel.parallelExecute(ExecutorKernel.java:95) at org.apache.shardingsphere.infra.executor.kernel.ExecutorKernel.execute(ExecutorKernel.java:78) at org.apache.shardingsphere.infra.executor.sql.resourced.jdbc.executor.SQLExecutor.execute(SQLExecutor.java:65) at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.JDBCExecuteEngine.executeWithManagedResource(JDBCExecuteEngine.java:130) at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.JDBCExecuteEngine.execute(JDBCExecuteEngine.java:123) at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.JDBCExecuteEngine.execute(JDBCExecuteEngine.java:103) at org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.doExecute(JDBCDatabaseCommunicationEngine.java:93) at org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.execute(JDBCDatabaseCommunicationEngine.java:79) at org.apache.shardingsphere.proxy.backend.text.query.QueryBackendHandler.execute(QueryBackendHandler.java:61) at org.apache.shardingsphere.proxy.frontend.mysql.command.query.text.query.MySQLComQueryPacketExecutor.execute(MySQLComQueryPacketExecutor.java:62) at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:100) at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:76) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) I have try add "useCursorFetch=true" property in jdbc connect config, also add it in client config file. It seems not work. ### Example codes for reproduce this issue (such as a github link). ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
