java.sql.SQLException：網絡錯誤IOException：沒有路由到主機？

Question

14:51:34,652 DEBUG [mchange.v2.resourcepool.BasicResourcePool   ] - An exception occurred while acquiring a poolable resource. Will retry. 
java.sql.SQLException: Network error IOException: No route to host: connect 
    at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:436) 
    at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184) 
    at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134) 
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182) 
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171) 
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137) 
    at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014) 
    at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32) 
    at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810) 
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547) 
Caused by: java.net.NoRouteToHostException: No route to host: connect 
    at java.net.DualStackPlainSocketImpl.connect0(Native Method) 
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source) 
    at java.net.PlainSocketImpl.connect(Unknown Source) 
    at java.net.SocksSocketImpl.connect(Unknown Source) 
    at java.net.Socket.connect(Unknown Source) 
    at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:288) 
    at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:251) 
    at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:331) 

誰能告訴我：

如何解決這個問題？

Answer 1

這是因爲你回來的ICMP「目標主機不可達」消息（類型3，代碼1）。

這意味着要麼這些事情：

• 你不必在你的路由表中的目的主機的路由（或者使用沒有一個路由器）;
• 防火牆將此消息發回給您。

在第一種情況下，如果可以修復路由（也許您已經忘記發起VPN？）。在第二種情況下，要求防火牆管理員會出現這種情況（幸運的是，他/她不會回答你「因爲是」，但給你一個真實的理由：P）

Answer 2

如果你沒有連接到服務器可能發生這種情況。嘗試ping它以確保。

Answer 3

檢查iptables服務停止。 「服務iptables的狀態」

而且通過以下命令從系統驗證， 「遠程登錄SERVER_IP 3306」

裁判：https://community.oracle.com/thread/1335778?start=0