java.sql.SQLRecoverableException: IO Error: Unknown host specified

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    java.sql.SQLRecoverableException: IO Error: Unknown host specified
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    java.sql.SQLRecoverableException: IO Error: Unknown host specified
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    java.sql.SQLRecoverableException: IO Error: Unknown host specified

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Root Cause Analysis

  1. java.sql.SQLRecoverableException

    IO Error: Unknown host specified

    at oracle.jdbc.driver.T4CConnection.logon()
  2. Oracle jdbc
    OracleDriver.connect
    1. oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:419)
    2. oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:536)
    3. oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:228)
    4. oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    5. oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
    5 frames
  3. c3p0:JDBC DataSources/Resource Pools
    ThreadPoolAsynchronousRunner$PoolThread.run
    1. com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134)
    2. com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
    3. com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:148)
    4. com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
    5. com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
    6. com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
    7. com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
    7 frames
  4. Oracle jdbc
    T4CConnection.logon
    1. oracle.net.resolver.HostnameNamingAdapter.resolve(HostnameNamingAdapter.java:191)
    2. oracle.net.resolver.NameResolver.resolveName(NameResolver.java:133)
    3. oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:404)
    4. oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:678)
    5. oracle.net.ns.NSProtocol.connect(NSProtocol.java:238)
    6. oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1054)
    7. oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:308)
    7 frames