RabbitMQ - How i catch ForgivingExceptionHandler?

Question

I'm trying to catch/cover all unexpected error such as error connection in rabbitmq. i've tried all what i think is related Exception (Exception, IOException, SocketException) even the general exception itself (all of this is not catching the error) so i can prefer other flow, maybe as example: doing log submit using 3rd party system, or notify admin via email while maintain code to reconnect for 3 more times instead showing this error message and stopping all execution.

Here's the uncatched error message :

16:27:51.476 [AMQP Connection 192.168.7.167:5672] ERROR com.rabbitmq.client.impl.ForgivingExceptionHandler - An unexpected connection driver error occured
java.net.SocketException: Socket Closed
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
    at java.net.SocketInputStream.read(SocketInputStream.java:171)
    at java.net.SocketInputStream.read(SocketInputStream.java:141)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
    at java.io.DataInputStream.readUnsignedByte(DataInputStream.java:288)
    at com.rabbitmq.client.impl.Frame.readFrom(Frame.java:91)
    at com.rabbitmq.client.impl.SocketFrameHandler.readFrame(SocketFrameHandler.java:184)
    at com.rabbitmq.client.impl.AMQConnection$MainLoop.run(AMQConnection.java:598)
    at java.lang.Thread.run(Thread.java:748)

Here's my code :

    package TestPackage;

    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.ConnectionFactory;

    import java.io.FileInputStream;
    import java.io.IOException;
    import java.net.SocketException;
    import java.util.Properties;
    import java.util.concurrent.TimeoutException;

    public class TestQueueSend {
        static ConnectionFactory rbmqFactory;
        static Connection rbmqConn;
        static Channel rbmqChannel;

        public static void main(String[] args){
            Properties rabbitMQConf = new Properties();
            try {
                rabbitMQConf.load(new FileInputStream("./config/rabbitmqconf.properties"));
            } catch (IOException errorLoadRabbitMQConfig) {
                errorLoadRabbitMQConfig.getStackTrace();
            }

            rbmqFactory = new ConnectionFactory();
            rbmqFactory.setUsername(rabbitMQConf.getProperty("rabbit_mq_username"));
            rbmqFactory.setPassword(rabbitMQConf.getProperty("rabbit_mq_password"));
            rbmqFactory.setVirtualHost(rabbitMQConf.getProperty("rabbit_mq_virtualHost"));
            rbmqFactory.setHost(rabbitMQConf.getProperty("rabbit_mq_host"));
            rbmqFactory.setPort(Integer.parseInt(rabbitMQConf.getProperty("rabbit_mq_port")));

            System.out.println("Running RabbitMQConnection!");

            try {
                System.out.println("Connection START : " + rabbitMQConf.getProperty("rabbit_mq_host"));
                rbmqConn = rbmqFactory.newConnection();

                System.out.println("Create Channel");
                rbmqChannel = rbmqConn.createChannel();

                String queueName = "queueTest";
                String queueContent = "Kasur ini rusak";

                System.out.println("Queue Declare");
                rbmqChannel.queueDeclare(queueName,false,false,false,null);
                rbmqChannel.basicPublish("",queueName,null,queueContent.getBytes());

                System.out.println(" [x] Sent '" + queueContent + "'");

                rbmqChannel.close();
                rbmqConn.close();
            } catch(SocketException errorSocketCatch) {
                System.out.println("ERROR_SOCKET");
                System.out.println(errorSocketCatch.getMessage());
            } catch(IOException errorIOCatch) {
                System.out.println("ERROR_IO");
                System.out.println(errorIOCatch.getMessage());
            } catch (TimeoutException errorTimeoutCatch) {
                System.out.println("ERROR_TIMEOUT");
                System.out.println(errorTimeoutCatch.getMessage());
            } catch (Exception errorGeneric) {
                System.out.println("ERROR_GENERIC");
                System.out.println(errorGeneric.getMessage());
            }
        }
    }

for other information, this is what i use :

Maven 3.3 
com rabbitmq amqp client 5.7.2 (5.7.1 not work too)
org slf4j slf4j api 1.7.26 
ch qos logback classic:1.2.3

for the ide i'm using :

IntelliJ IDEA 2019.1.3 (Community Edition)
Build #IC-191.7479.19, built on May 28, 2019
JRE: 1.8.0_202-release-1483-b58 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0

Answer 1

由于 param: virtual-host: /ABC而不是virtual-host: ABC的错误使用，我遇到了这个错误

Answer 2

Because the exception occurs in another thread in third-party code, you cannot actually catch it without modifying that code. However, you can hide it, as you requested to do in a comment.

To hide this exception you could edit your logging configuration file (logback.xml for logback in your case) and set the log level for the com.rabbitmq.client.impl.ForgivingExceptionHandler to OFF . But I would not advise doing this in general as it could hide important diagnostic information. So a better solution might be one of the following:

1. Call System.exit(0) to exit the program before the exception happens
2. Alternatively, set the same log level dynamically to OFF at the end of the program.

Answer 3

This happened to me because the rabbitmq user did not have permission to access the virtual host. After adding the permission the exception disappeared.