[英]Derby remote connection timed-out: how do I configure the network settings for the Derby Network Server?
我尝试构建具有网络/客户端数据库连接支持的程序。 我已经完成了数据库创建和GUI设计中与用户联系的所有工作。 一切都在本地计算机上运行完美(我的意思是DB可以创建PC并启动/停止Derby Server)
服务器配置;
//I take the exact path of derby jar files (derbyrun, derbynet, derby client etc.)
File file = new File(FirstTimeMainFrame.class.getProtectionDomain()
.getCodeSource()
.getLocation()
.getPath().replace(new File(FirstTimeMainFrame.class.getProtectionDomain().getCodeSource().getLocation().getPath()).getName(), "").replace("%20", " "));
String path = file+"\\DB";
//Execute CMD Command for derbyrun.jar set the DERBY INSTALL Classpath
ProcessBuilder builder = new ProcessBuilder();
Process process = null;
String[] commandStart = new String[3];
String[] commandStop = new String[3];
commandStart[0] = "cmd.exe";
commandStart[1] = "/c";
commandStart[2] = "cd "+path+" && java -jar derbyrun.jar server start";
builder = new ProcessBuilder(commandStart[0], commandStart[1], commandStart[2]);
builder.redirectErrorStream(true);
process = builder.start();
//Create the DB with using Derby Client Driver
String driver = "org.apache.derby.jdbc.ClientDriver";
String connectionURL = "jdbc:derby://localhost:1527//myDB"+";create=true";
Class.forName(driver).newInstance();
Connection conn = DriverManager.getConnection(connectionURL);
//Connect to DB and Setting the DB Properties
connectionURL = "jdbc:derby://localhost:1527//myDB"+";create=false";
conn = DriverManager.getConnection(connectionURL);
//Turning on authentication, Create sample users, Create sample tables etc...
//Shutdown the Derby Server
commandStop[0] = "cmd.exe";
commandStop[1] = "/c";
commandStop[2] = "cd "+path+" && java -jar derbyrun.jar server shutdown";
builder = new ProcessBuilder(commandStop[0], commandStop[1], commandStop[2]);
builder.redirectErrorStream(true);
process = builder.start();
工作良好的本地连接;
//Start the Server First
builder = new ProcessBuilder(commandStart[0], commandStart[1], commandStart[2]);
builder.redirectErrorStream(true);
process = builder.start();
//Load the driver and connect to Local DB
Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance();
String connectionUrl = "jdbc:derby://localhost:1527//myDB"+";create=false;" + "user=" +"\""+ unameTextField.getText() +"\""+ ";" + "password=" +"\""+ new String (passwordPasswordField.getPassword()) +"\""+ ";";
Connection con = DriverManager.getConnection(connectionUrl);
完善的远程连接;
Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance();
String connectionUrl = "jdbc:derby://10.90.232.2:1527//myDB"+";create=false;" + "user=" +"\""+ unameTextField.getText() +"\""+ ";" + "password=" +"\""+ new String (passwordPasswordField.getPassword()) +"\""+ ";";
Connection con = DriverManager.getConnection(connectionUrl);
--PC1(服务器一)创建并存储数据库文件。 程序启动时,它还具有启动和停止Derby Network Server的功能。 当PC1运行程序时,我在derby.log中看到以下几行,并了解Server已成功启动并正在运行;
Sat Dec 26 04:06:49 EET 2015 : Apache Derby Network Server - 10.12.1.1 - (1704137) started and ready to accept connections on port 1527
Sat Dec 26 04:06:49 EET 2015: Booting Derby version The Apache Software Foundation - Apache Derby - 10.12.1.1 - (1704137): instance a816c00e-0151-dc09-cf3e-ffffaab85dad on database directory C:\Users\Server_PC\Desktop\Trying Project\DB\myDB with class loader sun.misc.Launcher$AppClassLoader@1909752 Loaded from file:/C:/Users/Server_PC/Desktop/Trying%20Project/DB/derby.jar
java.vendor=Oracle Corporation
java.runtime.version=1.8.0_66-b18
user.dir=C:\Users\Server_PC\Desktop\Trying Project\DB
os.name=Windows 7
os.arch=x86
os.version=6.1
derby.system.home=C:\Users\Server_PC\Desktop\Trying Project\DB
Database Class Loader started - derby.database.classpath=''
--PC2(客户端一)尝试使用其LAN ip连接到远程服务器。
我在程序上附加了一些日志编写器,当我在客户端计算机上运行该程序时,出现以下异常;
java.sql.SQLNonTransientConnectionException: java.net.ConnectException : Error connecting to server 10.90.232.2 on port 1.527 with message Connection timed out: connect.
真的,我被困在这一点上。 我想念什么吗?
可能是Windows防火墙,该防火墙通常默认情况下处于启用状态,并且将阻止从另一台机器到Derby Network Server的入站连接,除非您明确配置Windows防火墙以允许此类连接。
原始海报阐明:
I forgot to say, sorry: I have already added Firewall Port rule
for 1527 to Inbound and Outbound in PC1. Interesting thing is
when I check netroutes with netstat -an | find "1527" in PC1 I
see 127.0.0.1 1527 is in LISTENING state.
It should be 10.90.232.2 1527 ?
您可以使用-h和-p参数来影响Derby Network Server的侦听地址和端口,因此要遵循以下防火墙规则,您需要说:
-h 10.90.232.2 -p 1527
原始发布者确认,以这种方式指定网络配置允许防火墙接受连接:
Exactly right. I found solution about 6-7 hours ago.
For server Start should be
commandStart[2] = "cd "+path+" && java -jar derbyrun.jar server start -h 10.90.232.2";
and shutdown
commandStop[2] = "cd "+path+" && java -jar derbyrun.jar server shutdown -h 10.90.232.2";
then server and client side connect with
String connectionUrl = "jdbc:derby://10.90.232.2:1527/myDB"+
";create=false;" + "user=" +"\""+ unameTextField.getText() +
"\""+ ";" + "password=" +"\""+
new String (passwordPasswordField.getPassword()) +"\""+ ";";
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