RaigorJiang commented on issue #24152:
URL:
https://github.com/apache/shardingsphere/issues/24152#issuecomment-1434050519
@sunkai-cai
This is the exception log I got. We can see the information of `Connection
refused`, which is the original information provided by the driver.
```
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link
failure
at
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:342)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2197)
at
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
at
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
at
com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
at
com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476)
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561)
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)
at
com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.checkState(DataSourceStateManager.java:84)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.initState(DataSourceStateManager.java:79)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.lambda$initStates$0(DataSourceStateManager.java:70)
at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.initStates(DataSourceStateManager.java:70)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsFactory.lambda$checkDataSourceStates$4(MetaDataContextsFactory.java:113)
at java.base/java.util.HashMap.forEach(HashMap.java:1421)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsFactory.checkDataSourceStates(MetaDataContextsFactory.java:111)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsFactory.create(MetaDataContextsFactory.java:87)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsFactory.create(MetaDataContextsFactory.java:68)
at
org.apache.shardingsphere.mode.manager.standalone.StandaloneContextManagerBuilder.build(StandaloneContextManagerBuilder.java:53)
at
org.apache.shardingsphere.proxy.initializer.BootstrapInitializer.createContextManager(BootstrapInitializer.java:69)
at
org.apache.shardingsphere.proxy.initializer.BootstrapInitializer.init(BootstrapInitializer.java:59)
at org.apache.shardingsphere.proxy.Bootstrap.main(Bootstrap.java:53)
Caused by: java.net.ConnectException: Connection refused
at java.base/sun.nio.ch.Net.pollConnect(Native Method)
at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:672)
at
java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:542)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:597)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
at java.base/java.net.Socket.connect(Socket.java:633)
at
com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:301)
... 34 common frames omitted
Exception in thread "main"
org.apache.shardingsphere.infra.datasource.state.exception.UnavailableDataSourceException:
DATA-SOURCE-00001: Data source unavailable.
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.lambda$checkState$1(DataSourceStateManager.java:87)
at
org.apache.shardingsphere.infra.util.exception.ShardingSpherePreconditions.checkState(ShardingSpherePreconditions.java:41)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.checkState(DataSourceStateManager.java:87)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.initState(DataSourceStateManager.java:79)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.lambda$initStates$0(DataSourceStateManager.java:70)
at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.initStates(DataSourceStateManager.java:70)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsFactory.lambda$checkDataSourceStates$4(MetaDataContextsFactory.java:113)
at java.base/java.util.HashMap.forEach(HashMap.java:1421)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsFactory.checkDataSourceStates(MetaDataContextsFactory.java:111)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsFactory.create(MetaDataContextsFactory.java:87)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsFactory.create(MetaDataContextsFactory.java:68)
at
org.apache.shardingsphere.mode.manager.standalone.StandaloneContextManagerBuilder.build(StandaloneContextManagerBuilder.java:53)
at
org.apache.shardingsphere.proxy.initializer.BootstrapInitializer.createContextManager(BootstrapInitializer.java:69)
at
org.apache.shardingsphere.proxy.initializer.BootstrapInitializer.init(BootstrapInitializer.java:59)
at org.apache.shardingsphere.proxy.Bootstrap.main(Bootstrap.java:53)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
Communications link failure
at
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:342)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2197)
at
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
at
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
at
com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
at
com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476)
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561)
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)
at
com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112)
at
org.apache.shardingsphere.infra.datasource.state.DataSourceStateManager.checkState(DataSourceStateManager.java:84)
... 13 more
Caused by: java.net.ConnectException: Connection refused
at java.base/sun.nio.ch.Net.pollConnect(Native Method)
at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:672)
at
java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:542)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:597)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
at java.base/java.net.Socket.connect(Socket.java:633)
at
com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:301)
... 34 more
```
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