Tag Archives: Problem solving

Error: Can’t initialize nvrm channel [How to Solve]

After the environment of Jetson nano is installed, debug the python program with Jupiter notebook. After starting
$Jupiter notebook
, a continuous prompt appears in terminal
error: can’t initialize nvrm channel
after query, it is related to the camera input on the nano, but the program does not use the camera. Jupyter can work normally, but it will affect the viewing of debugging information.

to bypass this problem, open the chromium browser before starting jupyter, and then jupyter will open the page in the existing browser, so the above error will not appear in terminal.

[Solved] asp.NETCORE connect to MySQL error: encoding 1252

The error information is as follows:

System.NotSupportedException:“No data is available for encoding 1252. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method.”


Add system.Through.nuget.Text.Encoding and system.Text.Encoding.References to codepages

Then add the following code to the code

System.Text.EncodingProvider ppp = System.Text.CodePagesEncodingProvider.Instance;

OK solve the problem

[Solved] CUDA unknown error – this may be due to an incorrectly set up environment


Today, a project using pytorch on the viewing server suddenly made an error after upgrading. The whole content of the error report is limited by the title. I’ll send it below.

builtins. RuntimeError: CUDA unknown error – this may be due to an incorrectly set up environment, e.g. changing env variable CUDA_ VISIBLE_ DEVICES after program start. Setting the available devices to be zero.

Screenshot of error reporting

Later, I consulted some materials, and the following are some solutions.


Method 1: add environment variables

Since I started the project as a docker container, I installed VIM after entering the container, and then in ~/Bashrc finally added something.


Since the selected graphics card number is 0 when building the container, the number I configured above is 0.

Check $CUDA after restarting the container_ VISIBLE_ The devices output is normal, but the problem is not solved, and the error is still reported.

Method 2: add environment variables to the code

Add the following code at the beginning of the initialization CUDA area.

import os
os.environ['CUDA_VISIBLE_DEVICES'] =‘0’

It still hasn’t solved the problem.

Method 3: restart the server

Referring to some articles, I mentioned that if the system upgrades the graphics card driver without restarting, it will also lead to the same error.

So I restarted the server and solved the problem.

[Solved] 1.fatal error: NvInfer.h: No such file or directory

yolov5 compile to generate engine error: /tensorrtx/yolov5/yololayer.h:6:10: fatal error: NvInfer.h: No such file or directory 6 | #include <NvInfer.h>
|          ^~~~~~~~~~~
compilation terminated.

1. The header file and library corresponding to tensorRT were not found.

In CMakeLists.txt
#tensorrt Add tensorrt corresponding header files and link libraries
# tensorrt


[Solved] An unexpected error has occurred. Conda has prepared the above report.

Problem Description:

Error when using CONDA to create a virtual environment:

An unexpected error has occurred. Conda has prepared the above report. 


Method (1): delete the .Condarc file

Method (2): CONDA clean - I

Method (3): after closing your VPN, restart your computer and continue to install the virtual environment

How to Solve Error: RuntimeError: all tensors must be on devices[0]

Problem description

The code running Zheng Zhedong’s aicity2020 reported an error. After searching, it was found that the problem is that the code running is more than GPU, but the specified code is a single GPU


In test2020.py, the code comments in lines 126 and 129 are replaced by the following code

# set gpu ids
# if len(gpu_ids)>0:
# torch.cuda.set_device(gpu_ids[0])
# cudnn.benchmark = True
os.environ['CUDA_VISIBLE_DEVICES'] = str(gpu_ids[0])

[Solved] Redis Error: Unexpected exception while processing command

1. Background

Redis has been running for a long time, and an error is reported one day as follows:

2. Phenomenon

org.redisson.client.RedisException: Unexpected exception while processing command
at org.redisson.command.CommandAsyncService.convertException(CommandAsyncService.java:338)
at org.redisson.command.CommandAsyncService.get(CommandAsyncService.java:140)
at org.redisson.RedissonObject.get(RedissonObject.java:90)
at org.redisson.RedissonBucket.set(RedissonBucket.java:131)

3. Solution

Restart the Java application!

What exactly caused it,

You can only guess the link pool of the redis client. Due to network and other reasons, the redis client has not responded for a long time and collapsed!


Gt Report Error ssh:connect to host github.com port 22

kex_exchange_identification: Connection closed by remote host
Connection closed by port 22
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

  It is suddenly found that git cannot operate, and an error is reported, as shown in the figure above.

Thought the SSH key failed?Check it. It’s corresponding.


$   ssh -T   [email protected]

The result is still  

Internet search method:

Test port 443 can be successful  

$ ssh -T -p 443 [email protected]

Referring to the online method, the solution is as follows:

  Locate git’s config file  /etc/ssh/ssh_ Config and edit

$   vi /etc/ssh/ssh_ config     

If you don’t have permission, use sudo

Add the following code at the end and save

Host github.com
User git
Hostname ssh.github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa
Port 443


Then you can operate git normally!

Plugin Error: Plugin “Android Code Generator“ is incompatible (supported only in IntelliJ IDEA)

1. Question

Plugin Error: Plugin “Android Code Generator” is incompatible (supported only in IntelliJ IDEA).

2. Solution


After deleting the file, restart the as to solve the problem.

3. Detailed steps

1. Enter the directory of Disk C and click the [user] folder

2. Find the directory of your [administrator] user name, that is, admin above

3. If you enter at this time, you may not find the appdata folder, so you need to open the hidden directory to see it (take win10 as an example here)

4. Follow the above file path to find the directory where the file is located

5. Delete the error folder. This is Android codegenerator plugin IntelliJ

6. Restart Android studio

Local repository upload to remote repository error: failed to push some refs to ‘https://hub.fastgit.org/zhizhangxuezhang/ui-test.git‘

There is an error in pushing from the local warehouse to the remote warehouse (rejected) because the code of the remote warehouse has been modified directly in the remote warehouse. At this time, the code of the local warehouse is different from that of the remote warehouse, so you must update the code of the local warehouse (Pull) first and then submit (push)

Error log in idea for this problem:

error log in Git bash:

at this time, you can only pull to update your local warehouse and then push to the remote warehouse, but you will find that you will also report an error when you pull to the local warehouse

at this time, your pull command should be changed to the following command, That is, just add a parameter to ignore the history (because the two branches are caused by different versions)

git pull origin master --allow-unrelated-histories

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘use

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userMapper'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userMapper' defined in file [E:\ProjectTest\IdeaProject\DVillages\target\classes\com\xh\mapper\UserMapper.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [E:\ProjectTest\IdeaProject\DVillages\target\classes\mybatis\mapper\supervise\ComplaintMailbox.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file [

Before XML modification of SQL statement:

after modification

the reason is the wrong parametertype

Error creating bean with name ‘servletEndpointRegistrar‘ defined in class path resource

The errors encountered in writing as service items today are shown below. I only know that the creation of error creating bean with name ‘servletendpointregistrar’ defined in class path resource failed. I also found some solutions on the Internet. The most common solutions are that there is a lack of JDBC dependency, or that the database configuration file is wrong. I also compared the database, There is no lack of JDBC dependency, which shows that my database and dependency are correct. I compared other service services and found that more configuration files were introduced into the configuration file

[${project.name}] 2021-09-10 23:21:44,213 ERROR [localhost-startStop-1][Jdk14Logger.java:87] - Error starting Tomcat context. Exception: org.springframework.beans.factory.UnsatisfiedDependencyException. Message: Error creating bean with name 'servletEndpointRegistrar' defined in class path resource [org/springframework/boot/actuate/autoconfigure/endpoint/web/ServletEndpointManagementContextConfiguration.class]: Unsatisfied dependency expressed through method 'servletEndpointRegistrar' parameter 0; nested exception is org.springframework.boot.context.properties.ConfigurationPropertiesBindException: Error creating bean with name 'management.endpoints.web-org.springframework.boot.actuate.autoconfigure.endpoint.web.WebEndpointProperties': Could not bind properties to 'WebEndpointProperties' : prefix=management.endpoints.web, ignoreInvalidFields=false, ignoreUnknownFields=true; nested exception is org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'management.endpoints.web.exposure' to org.springframework.boot.actuate.autoconfigure.endpoint.web.WebEndpointProperties$Exposure
[${project.name}] 2021-09-10 23:21:44,240 WARN [main][Jdk14Logger.java:87] - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
[${project.name}] 2021-09-10 23:21:44,241 INFO [main][DubboGenericServiceFactory.java:159] - The Dubbo GenericService ReferenceBeans are destroying...
[${project.name}] 2021-09-10 23:21:44,245 INFO [main][Jdk14Logger.java:87] - class org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor was destroying!

My Nacos profile is

#HTTP format configuration spring:
    charset: UTF‐8
    force: true
    enabled: true
    encoding: UTF‐8
#tomcat header information (user ip and access protocol) and access path configuration
    remote_ip_header: x‐forwarded‐for
    protocol_header: x‐forwarded‐proto
    context‐path: /lifly
  use‐forward‐headers: true

#Service monitoring and management configuration, operation and maintenance related
      include: refresh,health,info,env

This configuration file defines the user IP and access path, as well as some configuration files related to service monitoring, management and operation and maintenance. However, the remote call is not used in the service, but I introduced this configuration file. The reason for my error is this, so I recorded it
My bootstrap.yml configuration file is as follows:

  port: 56050 
    name: transaction-service
#  main:
#    allow-bean-definition-overriding: true # Spring Boot 2.1 
#        server-addr: ${nacos.server.addr}
        namespace: 339eea59-f7f4-44d0-a3fa-9f1f85bd5b4f
#        cluster-name: COMMON_GROUP
#        server-addr: ${nacos.server.addr} 
        file-extension: yaml
        namespace: 339eea59-f7f4-44d0-a3fa-9f1f85bd5b4f  
        group: DEFAULT_GROUP 
            refresh: true
            data-id: spring-boot-http.yaml # spring boot http
            group: COMMON_GROUP 
#          -
#            refresh: true
#            data-id: spring-boot-starter-druid.yaml # spring boot starter druid
#            group: COMMON_GROUP 
#          -
#            refresh: true
#            data-id: spring-boot-mybatis-plus.yaml # spring boot mybatisplus
#            group: COMMON_GROUP 
#          - refresh: true
#            data-id: spring-boot-redis.yaml 
#            group: COMMON_GROUP 
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/huiminpay_transaction?useUnicode=true&useSSL=false
    #  url: jdbc:mysql://localhost:3306/huiminpay_merchant_service?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true&useUnicode=true
    username: root
    password: 1234
  type-aliases-package: com.huiminpay.transaction.entity
  mapper-locations: classpath:/mapper/*.xml

    # dubbo 
    base-packages: com.huiminpay
    # dubbo 协议
    name: dubbo
    port: 20893
    address: nacos://
      port: 22250 # dubbo qos
    check: false
    timeout: 3000
    retries: -1

  config: classpath:log4j2.xml

I commented out the import file and the project started. Record it again, and I hope it will be helpful to you. Comment out the following import file

            refresh: true
            data-id: spring-boot-http.yaml # spring boot http set
            group: COMMON_GROUP