java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection

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Firewall might be blocking your connection, or MySQL it's not running on your server machine.

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Check if you have started your server, or if your server is set to listen to the port you're trying to connect and is waiting to accept connections and check if the firewall isn't blocking your connection.

Solutions on the web

via Stack Overflow by Emman Sun
, 1 year ago
IO Error: The Network Adapter could not establish the connection
via Stack Overflow by Kiran Joshi
, 2 years ago
IO Error: The Network Adapter could not establish the connection
via Oracle Community by Geoff B., 1 year ago
IO Error: The Network Adapter could not establish the connection
via Oracle Community by Cuong Pham, 6 months ago
IO Error: The Network Adapter could not establish the connection
via Oracle Community by 2878940, 5 months ago
IO Error: Invalid connection string format, a valid format is: "//host[:port][/service_name]"
via Oracle Community by deepsmart_javaTechy, 1 year ago
IO Error: Unknown host specified
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:150)
at oracle.net.nt.ConnOption.connect(ConnOption.java:133)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:370)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:434)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:687)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:363)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1102)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:320)
at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:546)
at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:236)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:701)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:635)
at org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:188)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:128)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.beginTransaction(JDBCTransactionManager.java:80)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.beginTransaction(EmbeddedRegistry.java:443)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.get(EmbeddedRegistry.java:505)
at org.wso2.carbon.registry.core.caching.CacheBackedRegistry.get(CacheBackedRegistry.java:203)
at org.wso2.carbon.registry.core.session.UserRegistry.getInternal(UserRegistry.java:617)
at org.wso2.carbon.registry.core.session.UserRegistry.access$400(UserRegistry.java:61)
at org.wso2.carbon.registry.core.session.UserRegistry$5.run(UserRegistry.java:597)
at org.wso2.carbon.registry.core.session.UserRegistry$5.run(UserRegistry.java:594)
at org.wso2.carbon.registry.core.session.UserRegistry.get(UserRegistry.java:594)
at org.wso2.carbon.registry.indexing.AsyncIndexer$IndexingTask.createIndexDocument(AsyncIndexer.java:242)
at org.wso2.carbon.registry.indexing.AsyncIndexer$IndexingTask.run(AsyncIndexer.java:210)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
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)

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