e:\JavaPrgms\JDBC>
java DbTest
DbTest main(-)
class loaded
java.sql.SQLException: Socket read timed out
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:412)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:
531)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:221)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtensio
n.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:503)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at DbTest.main(DbTest.java:17)
Caused by: oracle.net.ns.NetException: Socket read timed out
at oracle.net.ns.Packet.receive(Packet.java:320)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:286)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1042)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:301)
... 7 more
e:\JavaPrgms\JDBC>
whats the reason of this exception??