Tag Archives: client

Springcloud configuration center client 3355 startup Error: error on get request for“ http://localhost:8761/eureka/apps/ “: Connection

The error contents are as follows:

error on GET request for "http://localhost:8761/eureka/apps/": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect stacktrace=org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://localhost:8761/eureka/apps/": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:785)
	at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:711)
                            ...
Caused by: java.net.ConnectException: Connection refused: connect
	at java.net.DualStackPlainSocketImpl.connect0(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
     ...	

2022-01-08 22:16:56.800  WARN 15304 --- [           main] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failed with message: I/O error on GET request for "http://localhost:8761/eureka/apps/": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
2022-01-08 22:16:56.801  INFO 15304 --- [           main] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_UNKNOWN/windows10.microdone.cn - was unable to refresh its cache! This periodic background refresh will be retried in 30 seconds. status = Cannot execute request on any known server stacktrace = com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
		......

ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.configClientController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'config.info' in value "${config.info}"
2022-01-08 22:16:57.016  INFO 15304 --- [           main] com.netflix.discovery.DiscoveryClient    : Shutting down DiscoveryClient ...
2022-01-08 22:16:57.847  INFO 15304 --- [nfoReplicator-0] c.n.d.s.t.d.RedirectingEurekaHttpClient  : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8761/eureka/}, exception=I/O error on POST request for "http://localhost:8761/eureka/apps/UNKNOWN": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect stacktrace=org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://localhost:8761/eureka/apps/UNKNOWN": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
	......
	
2022-01-08 22:16:57.847  WARN 15304 --- [nfoReplicator-0] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failed with message: I/O error on POST request for "http://localhost:8761/eureka/apps/UNKNOWN": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
2022-01-08 22:16:57.849  WARN 15304 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_UNKNOWN/windows10.microdone.cn - registration failed Cannot execute request on any known server

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server

	......

2022-01-08 22:16:57.850  WARN 15304 --- [nfoReplicator-0] c.n.discovery.InstanceInfoReplicator     : There was a problem with the instance info replicator

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server

		......	

2022-01-08 22:16:57.851  INFO 15304 --- [           main] com.netflix.discovery.DiscoveryClient    : Unregistering ...
2022-01-08 22:16:58.855  INFO 15304 --- [           main] c.n.d.s.t.d.RedirectingEurekaHttpClient  : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8761/eureka/}, exception=I/O error on DELETE request for "http://localhost:8761/eureka/apps/UNKNOWN/windows10.microdone.cn": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect stacktrace=org.springframework.web.client.ResourceAccessException: I/O error on DELETE request for "http://localhost:8761/eureka/apps/UNKNOWN/windows10.microdone.cn": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
	com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
Caused by: java.net.ConnectException: Connection refused: connect
	at java.net.DualStackPlainSocketImpl.connect0(Native Method)
	......

2022-01-08 22:16:58.855  WARN 15304 --- [           main] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failed with message: I/O error on DELETE request for "http://localhost:8761/eureka/apps/UNKNOWN/windows10.microdone.cn": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
2022-01-08 22:16:58.856 ERROR 15304 --- [           main] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_UNKNOWN/windows10.microdone.cn - de-registration failedCannot execute request on any known server

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
	
		......
		
2022-01-08 22:16:59.013 ERROR 15304 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.configClientController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'config.info' in value "${config.info}"
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:405) ~[spring-beans-5.3.7.jar:5.3.7]

Cause of problem:

Because my spring cloud version is too high, I lack related dependencies.

Solution:

Add the following dependencies to the spring cloud configuration center client POM file:

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-bootstrap</artifactId>
    <version>3.1.0</version>
</dependency>

To illustrate, my spring cloud is version 2020.0.1, and the above dependencies should be added above the spring cloud g version.

[PHP]stream_socket_client(): Failed to enable crypto

Problem recurrence:

<?php
function getCertInfo($domain)
{
    $context = stream_context_create([
        'ssl' => [
            'capture_peer_cert'       => true,
            'capture_peer_cert_chain' => true,
        ],
    ]);

    $client = stream_socket_client("ssl://{$domain}:443", $errorCode, $errorMessage, 30, STREAM_CLIENT_CONNECT, $context);
    if ($client === false) {
        var_dump("!!!open {$domain} socket connection fail. {$errorMessage}($errorCode) !!!";
        return false;
    }

    $params = stream_context_get_params($client);
    if (empty($params['options']['ssl']['peer_certificate'])) {
        var_dump("!!!{$domain} stream_context_get_params options ssl peer_certificate is empty!!!");
        return false;
    }

    return openssl_x509_parse($params['options']['ssl']['peer_certificate']);
}

Solution: $context add verify_ Peer configuration

<?php 
$context = stream_context_create([
    'ssl' => [
        'capture_peer_cert'       => true,
        'capture_peer_cert_chain' => true,
        'verify_peer'             => false,
    ],
]);

After introducing security, the service cannot be registered with Eureka

When building the Eureka service of springcloud, security was introduced for security. However, it was found that the Eureka client could not register. The error log is as follows:

DiscoveryClient_ EUREKA-CLIENT/10.168.211.109:8001 – was unable to send heartbeat!

Later, I inquired about the Security version of the project (spring boot starter security in version 2.3.2.release introduces the security configuration of 5.3. X). If the version is too high, it will be changed by default   When CSRF (Cross Site Request Forgery) is turned on, you need to turn it off. The steps are as follows:

Add the following code into the startup file:


    @EnableWebSecurity
    static class WebSecurityConfig extends WebSecurityConfigurerAdapter {
        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http.csrf().disable(); // Close csrf
            super.configure(http);
        }
    }

The test is effective.