I am on a mac and am building a java spring boot project by following this tutorial:
https://spring.io/guides/tutorials/react-and-spring-data-rest/
However when I try to access the api through this command:
curl localhost:8080/api
I get the following message
Failed to connect to localhost port 8080: Connection refused
I'm not sure what the problem is! Grateful for your help,
Many thanks,
Related
I have written a java program to connect to AS400 DB. I am using jt400-6.4.jar to connect to DB.
DB Properties I am using:
as400_dbUrl=jdbc:as400://host/schema;translate binary=true
as400_dbUser=user
as400_dbPassword=pass
My program is not able to connect to DB server i am getting the below error.
2017-06-30 05:36:53 ERROR DBUtil:88 - Exception:
java.sql.SQLException: The application requester cannot establish the connection. (A remote host refused an attempted connect operation.)
at com.ibm.as400.access.JDError.throwSQLException(JDError.java:528)
at com.ibm.as400.access.AS400JDBCConnection.setProperties(AS400JDBCConnection.java:3130)
at com.ibm.as400.access.AS400JDBCDriver.prepareConnection(AS400JDBCDriver.java:1360)
at com.ibm.as400.access.AS400JDBCDriver.initializeConnection(AS400JDBCDriver.java:1211)
at com.ibm.as400.access.AS400JDBCDriver.connect(AS400JDBCDriver.java:352)
at java.sql.DriverManager.getConnection(DriverManager.java:426)
at java.sql.DriverManager.getConnection(DriverManager.java:474)
I googled about this, not able to find the exact reason.
I think jt400.jar will use 8471 as the port to connect to DB. Please correct me if I am wrong regarding this port.
I am not able to ping the host. ping host is not returning any response.
I am able to telnet like telnet host. But I am not able to telnet the system like telnet host 8471
Your hlep will be highly appreciable. Kindly help.
try updating your DB property as:
Add <:port-number> after host
as400_dbUrl=jdbc:as400://host:port/schema;translate binary=true
Hope this solves your problem.
I'm writing an application in Scala that is using the java HttpClient to try to connect to a url, however I keep on getting the error ERROR Catching java.net.UnknownHostException: my.address.com. The tests are being run using sbt in the terminal on Ubuntu, and when I ping the host from the same location it is able to resolve the ip.
Does anyone have a suggestion of why pinging the host works but my application can't find it?
While I am trying to connect my project to remote server in NetBeans.
Please help me to resolve this error in SFTP connection.
Can't connect to server 31.XXX.XX.XX
Cause.Session.connect:Java.net.SocketTimeoutException:Read timed out
Try to telnet to IP:PORT and check whether it is working.
I am trying to install "Kwok information server" and I am new to postgreSQL. I just followed the installation guide of Kwok information server.
when I am trying to install kwok-schema-setup.jar file using java through postgreSQL server in Command Prompt, I am getting the following error..."Connecting to PostgreSQL Server ...failed. Connection refused. Check that the ho
stname and port are correct and that the postmaster is accepting TCP/IP connecti
ons. Cause: java.net.ConnectException: Connection refused: connect
Schema setup encountered errors" .
And when I am trying to connect to the server using pgAdmin III, I am getting the following error "Server doesn't listen
The server doesn't accept connections: the connection library reports
could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "127.0.0.1" and accepting TCP/IP connections on port 5432? ".
Please anyone help me regarding, Thanks in advance!!
Looks like your Postgresql daemon is not running. Check if the server has started and is running. I dont know which OS you are using but try ps -ax on linux/mac or the task manager in windows.
Maybe a firewall that is blocking the connection, you have to provide more information about your environment to be sure.
I am trying to send a mail with gwt and java on the server with the buitin jetty on eclipse but I am getting the following error:
Cannot open and load mail server properties file.
Cannot send email. javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
nested exception is:
java.net.ConnectException: Connection refused: connect
does someone know what to configure to make it work??
This is not GWT related problem. Test you email sending code in isolation (without GWT and Jetty).
Start with sample code and configure it's parameters to your need. You will also need to use a SMTP server to send emails this way.