[GH-ISSUE #1615] Error connecting to database: null, message from server: "Host '172.17.0.1' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'" #374

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opened 2026-03-07 20:48:26 +03:00 by kerem · 0 comments

kerem commented

2026-03-07 20:48:26 +03:00

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Originally created by @Macolm6 on GitHub (Apr 18, 2023).
Original GitHub issue: https://github.com/dbeaver/cloudbeaver/issues/1615

Describe the bug
MySQL：Error connecting to database: null, message from server: "Host '172.17.0.1' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"

To Reproduce
Steps to reproduce the behavior:

Go to 'SQL Edit'
Click on 'connect'
See error
Error connecting to database:
null, message from server: "Host '172.17.0.1' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"
java.sql.SQLException: null, message from server: "Host '172.17.0.1' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:829)
at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:449)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:242)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.lambda$0(JDBCDataSource.java:206)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.lambda$1(JDBCDataSource.java:225)
at org.jkiss.dbeaver.utils.SecurityManagerUtils.wrapDriverActions(SecurityManagerUtils.java:96)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.openConnection(JDBCDataSource.java:223)
at org.jkiss.dbeaver.ext.mysql.model.MySQLDataSource.openConnection(MySQLDataSource.java:448)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCExecutionContext.connect(JDBCExecutionContext.java:103)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCRemoteInstance.initializeMainContext(JDBCRemoteInstance.java:102)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCRemoteInstance.(JDBCRemoteInstance.java:61)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.initializeRemoteInstance(JDBCDataSource.java:128)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.(JDBCDataSource.java:106)
at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.(JDBCDataSource.java:97)
at org.jkiss.dbeaver.ext.mysql.model.MySQLDataSource.(MySQLDataSource.java:92)
at org.jkiss.dbeaver.ext.mysql.MySQLDataSourceProvider.openDataSource(MySQLDataSourceProvider.java:148)
at org.jkiss.dbeaver.registry.DataSourceDescriptor.openDataSource(DataSourceDescriptor.java:1191)
at org.jkiss.dbeaver.registry.DataSourceDescriptor.connect(DataSourceDescriptor.java:1056)
at io.cloudbeaver.service.core.impl.WebServiceCore.initConnection(WebServiceCore.java:325)
at jdk.internal.reflect.GeneratedMethodAccessor256.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
4、other client can connected

Screenshots

Desktop (please complete the following information):

OS: [e.g. iOS]
Browser [e.g. chrome, safari]
Version [e.g. 22]

Additional context
Add any other context about the problem here, e.g. error log.

Originally created by @Macolm6 on GitHub (Apr 18, 2023). Original GitHub issue: https://github.com/dbeaver/cloudbeaver/issues/1615 **Describe the bug** MySQL：Error connecting to database: null, message from server: "Host '172.17.0.1' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'" **To Reproduce** Steps to reproduce the behavior: 1. Go to 'SQL Edit' 2. Click on 'connect' 3. See error Error connecting to database: null, message from server: "Host '172.17.0.1' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'" java.sql.SQLException: null, message from server: "Host '172.17.0.1' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'" at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122) at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:829) at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:449) at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:242) at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198) at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.lambda$0(JDBCDataSource.java:206) at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.lambda$1(JDBCDataSource.java:225) at org.jkiss.dbeaver.utils.SecurityManagerUtils.wrapDriverActions(SecurityManagerUtils.java:96) at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.openConnection(JDBCDataSource.java:223) at org.jkiss.dbeaver.ext.mysql.model.MySQLDataSource.openConnection(MySQLDataSource.java:448) at org.jkiss.dbeaver.model.impl.jdbc.JDBCExecutionContext.connect(JDBCExecutionContext.java:103) at org.jkiss.dbeaver.model.impl.jdbc.JDBCRemoteInstance.initializeMainContext(JDBCRemoteInstance.java:102) at org.jkiss.dbeaver.model.impl.jdbc.JDBCRemoteInstance.<init>(JDBCRemoteInstance.java:61) at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.initializeRemoteInstance(JDBCDataSource.java:128) at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.<init>(JDBCDataSource.java:106) at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.<init>(JDBCDataSource.java:97) at org.jkiss.dbeaver.ext.mysql.model.MySQLDataSource.<init>(MySQLDataSource.java:92) at org.jkiss.dbeaver.ext.mysql.MySQLDataSourceProvider.openDataSource(MySQLDataSourceProvider.java:148) at org.jkiss.dbeaver.registry.DataSourceDescriptor.openDataSource(DataSourceDescriptor.java:1191) at org.jkiss.dbeaver.registry.DataSourceDescriptor.connect(DataSourceDescriptor.java:1056) at io.cloudbeaver.service.core.impl.WebServiceCore.initConnection(WebServiceCore.java:325) at jdk.internal.reflect.GeneratedMethodAccessor256.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) 4、other client can connected ![image](https://user-images.githubusercontent.com/56667336/232917858-a1031755-51eb-4c45-806a-517f901c9d0f.png) **Screenshots** ![image](https://user-images.githubusercontent.com/56667336/232917262-d398e251-523a-42f0-a21e-7305b60df87f.png) **Desktop (please complete the following information):** - OS: [e.g. iOS] - Browser [e.g. chrome, safari] - Version [e.g. 22] **Additional context** Add any other context about the problem here, e.g. error log.