MyCATApache/Mycat-Server

java.nio.channels.ClosedChannelException: null

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#2,860 opened on Sep 30, 2021

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Description

问题描述： 通过mycat连接执行简单select查询，会显示正在查询，一直不返回消息，等待一会关掉查询再打开一个查询窗口就又恢复正常。 使用的mycat版本： Mycat-server-1.6.7.6-release-20210908145008-linux.tar.gz dataHost配置参数： maxCon="1000" minCon="50" balance="1" writeType="0" dbType="mysql" dbDriver="native" switchType="2"
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Contributor guide

Research direction
Investigate the ClosedChannelException in Mycat's NIO connector and connection pool management. Check if the exception occurs due to timeout, idle connection cleanup, or resource exhaustion in the dataHost configuration.
Tech stack
java
Domain
backenddatabase
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Needs investigation
Prerequisites
JavaMySQLNetworking
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30