Author Archives: Robins

[Solved] hytrix service degraded bean cannot inject error

Solve the problem that the hytrix service degraded bean cannot inject errors

1. Error reporting prompt

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'deptConsumerController': Unsatisfied dependency expressed through field 'clientService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.xys.service.DeptClientService': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: No fallbackFactory instance of type class com.xys.service.DeptClientServiceFallbackFactory found for feign client SPRINGCLOUD-PROVIDER-DEPT
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
	at com.xys.Consumer.main(Consumer.java:14) [classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_261]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_261]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_261]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_261]
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.1.4.RELEASE.jar:2.1.4.RELEASE]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.xys.service.DeptClientService': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: No fallbackFactory instance of type class com.xys.service.DeptClientServiceFallbackFactory found for feign client SPRINGCLOUD-PROVIDER-DEPT
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:178) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1674) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1249) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:257) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1470) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1427) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1210) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	... 24 common frames omitted
Caused by: java.lang.IllegalStateException: No fallbackFactory instance of type class com.xys.service.DeptClientServiceFallbackFactory found for feign client SPRINGCLOUD-PROVIDER-DEPT
	at org.springframework.cloud.openfeign.HystrixTargeter.getFromContext(HystrixTargeter.java:79) ~[spring-cloud-openfeign-core-2.1.1.RELEASE.jar:2.1.1.RELEASE]
	at org.springframework.cloud.openfeign.HystrixTargeter.targetWithFallbackFactory(HystrixTargeter.java:61) ~[spring-cloud-openfeign-core-2.1.1.RELEASE.jar:2.1.1.RELEASE]
	at org.springframework.cloud.openfeign.HystrixTargeter.target(HystrixTargeter.java:51) ~[spring-cloud-openfeign-core-2.1.1.RELEASE.jar:2.1.1.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.loadBalance(FeignClientFactoryBean.java:238) ~[spring-cloud-openfeign-core-2.1.1.RELEASE.jar:2.1.1.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.getTarget(FeignClientFactoryBean.java:267) ~[spring-cloud-openfeign-core-2.1.1.RELEASE.jar:2.1.1.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:247) ~[spring-cloud-openfeign-core-2.1.1.RELEASE.jar:2.1.1.RELEASE]
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	... 35 common frames omitted

2. Solution

Add an annotation to your degraded entity class so that it can be scanned

@Component
public class DeptClientServiceFallbackFactory implements FallbackFactory {
    @Override
    public Object create(Throwable throwable) {
        return new DeptClientService() {
            @Override
            public Dept queryById(Long id) {
                return new Dept()
                        .setDept_no(id)
                        .setDept_name("id=>"+id+"There is no corresponding information, the client has provided information about the downgrade and this service is now closed")
                        .setDb_source("No data");
            }

            @Override
            public List<Dept> queryAll() {
                return null;
            }

            @Override
            public boolean addDept(Dept dept) {
                return false;
            }
        };
    }
}

[Solved] Android x relies on AAR errors: Failed to transform…

Problem
Updating Android Studio and using androidx to generate arr, on which the application depends, results in many errors, as follows.

Failed to transform xxxx-.aar (:xxxx:) to match attributes {artifactType=jar, org.gradle.status=integration}
Failed to transform file ‘some-lib-release.aar‘ to match attributes {artifactType=processed-aar} usi

Solution:
Modify the configuration in gradle.properties.

android.enableJetifier=false

[Solved] error: when using the property decorator in Python, an error occurs: typeerror: descriptor ‘setter’ requires a ‘property’ object but

Error message

• When we use the property decorator, the following errors may be caused by the wrong writing of the decorator Name:

TypeError: descriptor 'setter' requires a 'property' object but received a 'function'

Problem analysis

• The reason for this error is that we write all decorator names as property instead of the same method name in our class:

Problem code

class AgeDemo(object):

    def __init__(self, age):
        self.age = age

    @property
    def age_test(self):
        return self.age

    @property.setter   # error
    def age_test(self, age):
        if not isinstance(age, int):
            raise TypeError('TypeError')
        self.age = age

Resolve error reporting

• Change the name of the decorator with an error in the figure to the same name set in our class to solve this error
the code is as follows:

class AgeDemo(object):

    def __init__(self, age):
        self.age = age

    @property
    def age_test(self):
        return self.age

    @age_test.setter # 修改的代码行
    def age_test(self, age):
        if not isinstance(age, int):
            raise TypeError('TypeError')
        self.age = age

[Solved] Communications–8–Generated resource conflict: two resources of the same name: /Radioxx

  1. Ecplise: Right-click project -> Properties -> C\C++ Build -> Tool Chain Editor.
    Current Builder: choose  ‘Gnu make builder’ -> Apply (or Ok).

    The reason for the problem: the builder that does not support GCC and G++ compilers is selected. ‘CDT internal builder’

MySQL server has gone away Error [How to Solve]

Reference: solution to MySQL server has gone away error – time blog
When we use Mysql to import large file SQL, we may report the MySQL server has gone away error. The problem is the default value setting of  max_allowed_packet configuration is too small. You only need to increase the value of this item and import it again to succeed. This item is used to limit the size of the package received by the MySQL server. Therefore, if the imported file is too large, it may exceed the value set in this item, resulting in unsuccessful import! Let’s take a look at how to view and set the value of this item.

View the value of Max_allowed_packet

show global variables like 'max_allowed_packet';


+--------------------+---------+
| Variable_name      | Value   |
+--------------------+---------+
| max_allowed_packet | 4194304 |
+--------------------+---------+

You can see that the size of this item is only 4m by default. Next, set the value to 150m (1024 * 1024 * 150)

set global max_allowed_packet=157286400;

View the size again

show global variables like 'max_allowed_packet';

By increasing this value, generally speaking, importing SQL with a large amount of data should be successful again. If an error is still reported, continue to increase it. Please note that setting in the command line is only valid for the current time. After restarting the MySQL service, restore the default value, but you can modify the configuration file (you can add max_allowed_packet = 150m in the configuration file my.cnf) To achieve the purpose of permanent validity, but in fact, we do not often import such a large amount of data, so I think the current configuration can take effect through the command, and there is no need to modify the configuration file.

spring cloud 2020 gateway Error 503 [How to Solve]

POM file dependency

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <!--gateway fhadmin.org-->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-gateway</artifactId>
        <version>3.0.2</version>
    </dependency>
    <!--spring-boot fhadmin.org-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

The related dependencies of Nacos I added in the parent component are as follows:

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
    <version>${nacos.version}</version>
</dependency>
<!--alibaba fhadmin.org-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    <version>${nacos.version}</version>
</dependency>

The version of Nacos is as follows:

<properties>
    <nacos.version>2021.1</nacos.version>
</properties>

The application.yml file of gateway is configured as follows:

#fhadmin.org
server:
  port: 9040

spring:
  application:
    name: gateway
  cloud:
    gateway:
      routes:
        - id: consumer
          uri: lb://consumer
          #          uri: http://localhost:9010
          predicates:
            - Path=/**
    nacos:
      discovery:
        server-addr: localhost:8848
        metadata:
          preserved.heart.beat.interval: 3 
          preserved.heart.beat.timeout: 6 
          preserved.ip.delete.timeout: 9

When I pass URI: http://localhost:9010 When calling a service, it can be called, but when I use URI LB:// consumer, I cannot call the service, and an error 503 is reported

The solution is:
Add feign dependency.

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-gateway</artifactId>
        <version>3.0.2</version>
    </dependency>

    <!--fegin fhadmin.cn-->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-openfeign</artifactId>
        <version>3.0.2</version>
    </dependency>
    <!-- Feign Client for loadBalancing -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-loadbalancer</artifactId>
        <version>3.0.2</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

Guess the reason: Nacos is compatible with feign. Feign integrates ribbon and realizes load balancing by default; Maybe Nacos is not compatible with the ribbon of springcloud gateway.

Cannot read property ‘isFile‘ of undefined [How to Solve]

Today, when I started the project, I couldn’t get up. I always reported an error. After translation research, I came to the solution

When executing Vue project NPM run dev FileManager webpack plugin error typeerror: cannot read property 'isfile' of undefined 

D:\abinwork\fmis_web\node_modules\filemanager-webpack-plugin\lib\index.js:271
        if (isGlob) archive.glob(command.source, globOptions);else if (sStats.isFile()) archive.file(command.source, { 
        name: path$1.basename(command.source) });else if (sStats.isDirectory()) archive.glob('**/*', {
                                                                              ^

TypeError: Cannot read property 'isFile' of undefined
    at D:\abinwork\fmis_web\node_modules\filemanager-webpack-plugin\lib\index.js:271:79
    at D:\abinwork\fmis_web\node_modules\graceful-fs\polyfills.js:282:31

The reason for the error is very simple, because the project we just pulled down does not have a dist directory, and then FileManager webpack plugin find a dist directory and find that it does not exist, and then strike and quit, resulting in an error;

There are two solutions

First, you can repackage it;

npm run build

Second, modify the configuration and automatically create the dist directory when running

Note: look at the first step first. If you can run the NPM run build and then the NPM run dev project, you don’t have to perform the second step

plugins: [
    new FileManagerWebpackPlugin ({
      onEnd: {
        mkdir: [‘./dist‘],
        delete: [
          ‘./dist.zip‘,
        ],
        archive: [
          {source: ‘./dist‘, destination: ‘./dist.zip‘},
        ]
      }
    })
  ],

TP5 fuzzy Chinese characters error [How to Solve]

When using TP5 to fuzzy query Chinese characters, sometimes some Chinese characters will report errors, which are placeholder errors, so modify the paging style;

Modify the bootrapthink.php file

return sprintf(
//                    '<div id="page" class="page_div pagination">%s %s %s<span class=\'totalSize\'> 跳转<input class=\'jump_class jump_page_num\' οnkeyup="this.value=this.value.replace(/\D/, \'\');" type=\'text\' value=\'\'>页 </span><a href=\'javascript:void(0);\' οnclick=\'jumpPage(this);\' data-href="'.$base_url.'" class=\'jump_btn\' style=\'color: #18a689;border: 1px solid #18a689!important;margin-left:0px;\'>确定</a><span class="totalPages"> 共<span>'.$this->lastPage.'</span>页 </span><span class="totalSize"> 共<span>'.$this->total.'</span>条记录 </span></div>',
//                    $this->getPreviousButton(),
//                    $this->getLinks(),
//                    $this->getNextButton()

Sometimes you will find something wrong with his placeholder

Change to:

return '<div id="page" class="page_div pagination">'.$this->getPreviousButton().' '.$this->getLinks().' '.$this->getNextButton().'<span class=\'totalSize\'> 跳转<input class=\'jump_class jump_page_num\' οnkeyup="this.value=this.value.replace(/\D/, \'\');" type=\'text\' value=\'\'>页 </span><a href=\'javascript:void(0);\' οnclick=\'jumpPage(this);\' data-href="'.$base_url.'" class=\'jump_btn\' style=\'color: #18a689;border: 1px solid #18a689!important;margin-left:0px;\'>确定</a><span class="totalPages"> 共<span>'.$this->lastPage.'</span>页 </span><span class="totalSize"> 共<span>'.$this->total.'</span>条记录 </span></div>';

With specific analysis of the situation, finally, I wish you all a smooth work!

[Solved] Error in OpenSSL when compiling code locally for raspberry pie

Error in OpenSSL when compiling code locally for raspberry pie

Error content

/usr/lib/gcc/arm-linux-gnueabihf/6/../../../libcurl.so: undefined reference to `SSL_CTX_set_keylog_callback@OPENSSL_1_1_1'
/usr/lib/gcc/arm-linux-gnueabihf/6/../../../libcurl.so: undefined reference to `SSL_CTX_set_post_handshake_auth@OPENSSL_1_1_1'
/usr/lib/gcc/arm-linux-gnueabihf/6/../../../libcurl.so: undefined reference to `SSL_CTX_set_ciphersuites@OPENSSL_1_1_1'

Raspberry pie still reports an error when querying the OpenSSL version number locally

openssl version

Error content:

openssl: /usr/lib/arm-linux-gnueabihf/libssl.so.1.1: version `OPENSSL_1_1_1' not found (required by openssl)
openssl: /usr/lib/arm-linux-gnueabihf/libcrypto.so.1.1: version `OPENSSL_1_1_1' not found (required by openssl)

Problem source:

After inquiry, it is mainly LD_LIBRARY_environment variable path is not specified, so OpenSSL is using the old system OpenSSL library

Solution:

Temporary solution: the terminal enters the following command to temporarily add the environment variables of OpenSSL library, but this method can only ensure that the current terminal is valid. If a new terminal is opened, an error will still be reported

export LD_LIBRARY_PATH=/usr/local/lib

Permanent solution: modify the. Bashrc hidden file in the working directory, taking raspberry pie as an example

vi /home/pi/.bashrc 
export LD_LIBRARY_PATH=/usr/local/lib 
source .bashrc 
sudo reboot

You can also enter the following command

echo "export LD_LIBRARY_PATH=/usr/local/lib" >> ~/.bashrc

After completing the above series of operations, you can enter the following commands to check whether it is normal

pi@raspberrypi:~ $ openssl
OpenSSL> version
OpenSSL 1.1.1l  24 Aug 2021
OpenSSL> q

Finally, the problem is solved and the compiled code is an error