createphysicalconnection 报错:create connection exception, url: jdbc:postgresql://103.161.83.55:8000/blazedb?currentSchema=jimu&ssl=false, errorcode 0, state 99999


错误分析 从你给出的报错信息 `create connection exception` 可知,在尝试创建数据库连接时出现异常。下面为你分析可能的原因以及对应的解决方案。 可能原因及解决方案 1. 数据库服务未启动 若PostgreSQL服务未启动,客户端就无法建立连接。可通过以下方式检查和启动服务: - Linux系统: ```bash # 检查服务状态 sudo systemctl status postgresql # 启动服务 sudo systemctl start postgresql ``` - Windows系统: - 打开“服务”窗口,找到“PostgreSQL”服务,若未启动则手动启动。 2. 数据库地址、端口或数据库名错误 确保 `jdbc:postgresql://103.161.83.55:8000/blazedb` 中的IP地址、端口号和数据库名是正确的。 - 检查IP地址 `103.161.83.55` 是否能正常访问。 - 确认PostgreSQL服务监听的端口是否为 `8000`。 - 检查数据库名 `blazedb` 是否存在。 3. 防火墙限制 防火墙可能会阻止客户端与数据库服务器之间的连接。需确保防火墙允许客户端访问数据库服务器的指定端口(这里是 `8000`)。 - Linux系统: ```bash # 开放8000端口 sudo ufw allow 8000 ``` 4. 数据库驱动问题 确保项目中正确引入了PostgreSQL的JDBC驱动。如果你使用的是Maven项目,可在 `pom.xml` 中添加以下依赖: ```xml <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>42.3.1</version> </dependency> ``` 5. 代码示例 以下是一个简单的Java代码示例,用于连接PostgreSQL数据库: ```java import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class PostgreSQLConnectionExample { public static void main(String[] args) { // 数据库连接URL String url = "jdbc:postgresql://103.161.83.55:8000/blazedb?currentSchema=jimu&ssl=false"; // 数据库用户名 String user = "your_username"; // 数据库密码 String password = "your_password"; try { // 加载PostgreSQL JDBC驱动 Class.forName("org.postgresql.Driver"); // 建立数据库连接 Connection connection = DriverManager.getConnection(url, user, password); System.out.println("数据库连接成功!"); // 关闭连接 connection.close(); } catch (ClassNotFoundException e) { System.out.println("未找到PostgreSQL JDBC驱动!"); e.printStackTrace(); } catch (SQLException e) { System.out.println("数据库连接失败!"); e.printStackTrace(); } } } ``` 额外注意的逻辑点 1. 确保数据库用户名和密码正确,并且该用户具有访问指定数据库的权限。 2. 注意数据库连接URL中的参数,如 `currentSchema` 和 `ssl` 等,要根据实际情况进行设置。 3. 若数据库服务器配置了SSL连接,需要正确配置SSL相关参数,否则可能会导致连接失败。 [2025-07-09 14:20:13 | AI写代码神器 | 793点数解答]
- createphysicalconnection 报错:create connection exception, url: jdbc:postgresql://103.161.83.55:8000/blazedb?currentSchema=jimu&ssl=false, errorcode 0, state 99999(793点数解答 | 2025-07-09 14:20:13)70
- createphysicalconnection 报错:create connection exception, url: jdbc:postgresql://103.161.83.55:8000/blazedb?currentSchema=jimu&ssl=false, errorcode 0, state 08001(825点数解答 | 2025-07-09 14:18:31)70
- createphysicalconnection 报错:create connection exception, url: jdbc:mysql://10.2.0.14:3306/gm_xihe?autoreconnect=true&usessl=false&useunicode=true&characterencoding=utf-8&zerodatetimebehavior=converttonull&transformedbitisboolean=true&servertimezone=gmt%2b8, errorcode 0, state 99999(853点数解答 | 2025-07-09 14:09:48)78
- dm.jdbc.driver.dmexception: 数据溢出 at dm.jdbc.driver.dberror.throwexception(dberror.java:636) at dm.jdbc.c.b.p.s(msg.java:225) at dm.jdbc.c.b.p.p(msg.java:185) at dm.jdbc.c.b.p.o(msg.java:166) at dm.jdbc.c.a.a(dbaccess.java:776) at dm.jdbc.c.a.a(dbaccess.java:327) at dm.jdbc.c.a.a(dbaccess.java:435) at dm.jdbc.driver.dmdbpreparedstatement.executeinner(dmdbpreparedstatement.java:284) at dm.jdbc.driver.dmdbpreparedstatement.do_executequery(dmdbpreparedstatement.java:383) at dm.jdbc.driver.(598点数解答 | 2024-10-15 15:48:38)224
- 问题排查:dm.jdbc.driver.dmexception: 数据溢出 at dm.jdbc.driver.dberror.throwexception(dberror.java:636) at dm.jdbc.c.b.p.s(msg.java:225) at dm.jdbc.c.b.p.p(msg.java:185) at dm.jdbc.c.b.p.o(msg.java:166) at dm.jdbc.c.a.a(dbaccess.java:776) at dm.jdbc.c.a.a(dbaccess.java:327) at dm.jdbc.c.a.a(dbaccess.java:435) at dm.jdbc.driver.dmdbpreparedstatement.executeinner(dmdbpreparedstatement.java:284) at dm.jdbc.driver.dmdbpreparedstatement.do_executequery(dmdbpreparedstatement.java:383) at dm.jdbc.dr(403点数解答 | 2024-10-15 15:48:41)912
- createphysicalconnection 报错:create connection exception, url: jdbc:mysql://10.2.0.14:3306/gm_xihe?autoreconnect=true&usessl=false&useunicode=true&characterencoding=utf-8&zerodatetimebehavior=converttonull&transformedbitisboolean=true&servertimezone=gmt%2b8, errorcode 0, state 08001(384点数解答 | 2024-05-28 16:52:07)229
- createphysicalconnection 报错:create connection exception, url: jdbc:mysql://10.2.0.14:3306/gm_xihe?autoreconnect=true&usessl=false&useunicode=true&characterencoding=utf-8&zerodatetimebehavior=converttonull&transformedbitisboolean=true&servertimezone=gmt%2b8, errorcode 0, state 08001(1477点数解答 | 2024-05-28 16:54:11)277
- createphysicalconnection 报错:create connection exception, url: jdbc:mysql://10.2.0.14:3306/gm_xihe?autoreconnect=true&usessl=false&useunicode=true&characterencoding=utf-8&zerodatetimebehavior=converttonull&transformedbitisboolean=true&servertimezone=gmt%2b8, errorcode 0, state 08001(279点数解答 | 2024-05-28 16:54:27)215
- createphysicalconnection 报错:create connection exception, url: jdbc:mysql://10.2.0.14:3306/gm_xihe?autoreconnect=true&usessl=false&useunicode=true&characterencoding=utf-8&zerodatetimebehavior=converttonull&transformedbitisboolean=true&servertimezone=gmt%2b8, errorcode 0, state 08001(451点数解答 | 2024-05-28 16:54:41)248
- 编写一个爬虫实现深度优先爬虫,爬取的网站为 www.baidu.com。使其输出预期为:Add the seeds url ['http://www.baidu.com'] to the unvisited url list Pop out one url "http://www.baidu.com" from unvisited url list Get 10 new links Visited url count: 1 Visited deepth: 1 10 unvisited links: Pop out one url "http://news.baidu.com" from unvisited url list Get 52 new links Visited url count: 2 Visited deepth: 2 Pop out one url "http://www.hao123.com" from unvisited url list Get 311 new links Visited url count: 3 Visited deepth: 2 Pop out(2142点数解答 | 2025-05-13 15:54:49)189
- "nested exception is org.apache.ibatis.exceptions.persistenceexception: \r\n### error querying database. cause: org.springframework.jdbc.cannotgetjdbcconnectionexception: failed to obtain jdbc connection; nested exception is com.microsoft.sqlserver.jdbc.sqlserverexception: “encrypt”属性设置为“false”且 “trustservercertificate”属性设置为“true”,但驱动程序无法使用安全套接字层 (ssl) 加密与 sql server 建立安全连接:错误:the server selected protocol version tls10 is not accepted by client preferences [tls12]。 clientconnectionid:ec54cc45-3(205点数解答 | 2024-09-04 19:14:42)303
- string url = "https://virtualcourse.zhihuishu.com/report/savereport"; try { url requesturl = new url(url); httpurlconnection connection = (httpurlconnection) requesturl.openconnection(); connection.setdooutput(true); connection.setrequestmethod("post"); connection.setrequestproperty("content-type", "multipart/form-data; boundary=----webkitformboundary7ma4ywxktrzu0gw"); dataoutputstream outputstream = new dataoutputstream(connection.getoutputstream()); // 添加文本参数 outputstream.writebytes("------web(404点数解答 | 2024-05-20 09:08:20)253