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Code a pile of red, no error.
When this happens to visual studio,
Author’s solution:
1. Set using namespace STD
2. Save the cpp file after deletion,
3. Add using namespace STD
4. Save the cpp file.
Don’t ask me why, anyway, the red wavy line has disappeared!
Recently, I wrote a visualization program in Python and used the daopycharts Library in the middle. There is no problem running it alone. However, after using pyinstall to package it into a separate EXE file, the running program reported an error: jinja2.exceptions.templatenotfound: chart_ component.html
After searching for relevant information on the Internet, it is said that pyinstaller and pyecarts are incompatible. The solutions after trying are as follows:
1. Change the packaging method and use the – D parameter to package it into a file instead of using the – f parameter to package it directly into an EXE file
as pyinstaller -D -p d:\path run.py
-p d: \ path is the site packages path of the imported package in your file. If the path of the pyecarts library on the computer is C: \ Python 37 \ lib \ site packages, it is written here as – P C:\Python37\Lib\site-packages
Run.py is the target entry file that needs to be packaged
2. After pyinstaller is packaged, it will generate two folders: build and dist. open the dist folder and copy the pyecarts folder under C: \ Python 37 \ lib \ site packages to this directory
Run the packaged exe program, and the error message disappears
Question
Analysis: according to the error prompt, it should be the problem of maven checkstyle plugin.
solve
Method 1: find the plug-in maven checkstyle plugin: 2.17 and add the skip attribute.
Modify pom.xml
Method 2: find the plug-in tag corresponding to maven checkstyle plugin: 2.17 and comment it out.
Clear the original target directory and recompile it!
Add the following code in pom.xml:
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/jstl/jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
After MAC reinstalls anaconda, it is found that each time terminal is opened, anconda’s environment is started by default. However, I don’t want to use anconda’s environment by default, as shown in the following figure.
The closing method is as follows
Method 1:
Every time you exit the base environment through CONDA deactivate on the command line, return to the automatic environment of the system
Method 2
1. By setting Auto_ activate_ Set the base parameter to false to implement:
conda config --set auto_activate_base false
2. If you want to enter, you can use CONDA activate base
3. If you go back and hope to keep it all the time, pass
conda config --set auto_activate_base true
recovery
During development, sometimes when you open a project to install a dependency, or create a new springboot project to install some dependencies, the following errors appear inexplicably:
First check whether there is a problem with the network. If the network is normal, 99% of the problems occur in the Maven configuration of the idea. Open it settings -& gt; Find the location of the screenshot below and modify the following two places:
Maven home path: the installation directory of Maven
user setttings file: Maven installation directory – & gt; conf -> Setting.xml file path
local repository: This is a customized Maven local repository after downloading Maven. Mine is in the Maven installation directory.
After these three settings are completed, click apply, OK and refresh.
in recent projects, SCSS has been directly used, and it is found that an error is reported. Up to now, I don’t know the cause, but I probably know that it is node, but the solution has been found. Let’s share:
1、 Error reporting
./src/components/alert_tip/alert_tip.scss (./node_modules/css-loader??ref--6-oneOf-5-1!./node_modules/postcss-loader/src??postcss!./node_modules/sass-loader/lib/loader.js!./src/components/alert_tip/alert_tip.scss)
Error: ENOENT: no such file or directory, scandir 'C:\Users\Administrator\Desktop\xxx\xxx\xxx\xxx\xxx-elm\node_modules\node-sass\vendor'
2、 Solution
just run the following code directly:
npm rebuild node-sass
Method 1 (verified to be correct):
Find the my.ini configuration file in the installation directory and add the following code:
max_allowed_packet=500M
wait_timeout=288000
interactive_timeout = 288000
The three parameters are annotated as follows:
max_ allowed_ Packet is the largest packet allowed by mysql, that is, the request you send;
wait_ Timeout is the maximum waiting time. You can customize this value. However, if the time is too short, a MySQL server has gone away #2006 error will appear after the timeout.
max_ allowed_ The packet parameter is used to control the maximum length of its communication buffer
Method 2 (online extract is not verified temporarily):
Open tools in the menu of Navicat, select server monitor, then select in the left column, and click variable in the right column to find max_ allowed_ Packet and increase its value.
In the Chinese version: in the menu, tools – & gt; Server monitoring – & gt; Tick in front of the database list on the left – & gt; Find Max in the variable on the right_ allowed_ Packet, increase the value, such as 999999999
MySQL settings are case insensitive:
MySQL under Linux is case sensitive by default. You can make MySQL case insensitive by the following settings:
1. Log in with root and modify/etc/my.cnf
2. Under the [mysqld] node, add a line: lower_ case_ table_ Names = 1
3. Restart MySQL;
Where lower_ case_ table_ The name = 1 Parameter defaults to 1 in windows and 0 in UNIX. Therefore, the problem will not be encountered in windows. Once it reaches Linux, the cause of the problem will occur (especially when MySQL names the table with uppercase letters, but when querying with uppercase letters, there will be an error that cannot be found, which is really puzzling)
View the maximum length of the communication buffer:
show global variables like ‘max_ allowed_ packet’;
The default maximum is 1m. You can modify the maximum length of the communication buffer to 16m:
set global max_ allowed_ packet=1024102416;
Query again:
Next, import again. Import succeeded!
Note: the modification is only valid for the current. If MySQL is restarted, it will still restore the original size. If you want to take effect permanently, you can modify the configuration file and add or modify the configuration in my.ini (under Windows) or my.cnf (under Linux):
max_ allowed_ packet = 16M
Restart MySQL service
During the development of Nordic 52810, after the softdevice is re written, when nrfconnect for Mobile Connect is used, the connection fails, and the mobile phone displays peer removed pairing information. Device side log information:
< info> peer_ manager_ handler: Connection security failed: role: Peripheral, conn_ handle: 0x0, procedure: Encryption, error: 4102
Solution: in the Bluetooth settings of the mobile phone, find the device to be connected, select “ignore this device”, and re connect with nrfconnect. Success!
Error creating bean with name ‘spring.rabbitmq-org.springframework.boot.autoconfigure.amqp.RabbitProperties’
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'rabbitConnectionFactory' defined in class path resource [org/springframework/boot/autoconfigure/amqp/RabbitAutoConfiguration$RabbitConnectionFactoryCreator.class]: Unsatisfied dependency expressed through method 'rabbitConnectionFactory' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.rabbitmq-org.springframework.boot.autoconfigure.amqp.RabbitProperties': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.autoconfigure.amqp.RabbitProperties] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1179)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:571)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:923)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:588)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1311)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1300)
at com.ata.sms.simulator.Application.main(Application.java:14)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.rabbitmq-org.springframework.boot.autoconfigure.amqp.RabbitProperties': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.autoconfigure.amqp.RabbitProperties] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:289)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1286)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1203)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:571)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)
... 20 common frames omitted
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.autoconfigure.amqp.RabbitProperties] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481)
at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:267)
... 33 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/amqp/rabbit/connection/AbstractConnectionFactory$AddressShuffleMode
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.getDeclaredMethods(Class.java:1975)
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463)
... 35 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.amqp.rabbit.connection.AbstractConnectionFactory$AddressShuffleMode
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 39 common frames omittedError reason: spring boot is used, but MQ. In spring boot is not used
Original dependence
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
Amend to read
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
I’m about to cry by myself.
first of all, install portaudio
brew install portaudio
Secondly, find the installation path of portaudio
sudo find/-name "portaudio.h"
In my example, my path is stored in /opt/Hometree/cellular/portaudio/19.7.0/include/portaudio. H
Finally, replace the portaudio path with your own and run the following code
pip install --global-option='build_ext' --global-option='-I/opt/homebrew/Cellar/portaudio/19.7.0/include' --global-option='-L/opt/homebrew/Cellar/portaudio/19.7.0/lib' pyaudio
run kubeadm init –config=kubeadm.yml –upload-certs | tee kubeadm-init.log command error: failed to pull image registry.aliyuncs.com/google_containers/coredns:v1.8.0
full error message as below:
kubeadm init --config=kubeadm.yml --upload-certs | tee kubeadm-init.log
[init] Using Kubernetes version: v1.21.2
[preflight] Running pre-flight checks
[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
[WARNING Hostname]: hostname "node" could not be reached
[WARNING Hostname]: hostname "node": lookup node on 127.0.0.53:53: server misbehaving
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR ImagePull]: failed to pull image registry.aliyuncs.com/google_containers/coredns:v1.8.0: output: Error response from daemon: manifest for registry.aliyuncs.com/google_containers/coredns:v1.8.0 not found: manifest unknown: manifest unknown
, error: exit status 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher
Prompt to pull registry.aliyuncs.com/google_ Containers/coredns: v1.8.0 this image failed
use kubedm config images list — config kubedm.yml to query the image to be downloaded
kubeadm config images list --config kubeadm.yml
registry.aliyuncs.com/google_containers/kube-apiserver:v1.21.2
registry.aliyuncs.com/google_containers/kube-controller-manager:v1.21.2
registry.aliyuncs.com/google_containers/kube-scheduler:v1.21.2
registry.aliyuncs.com/google_containers/kube-proxy:v1.21.2
registry.aliyuncs.com/google_containers/pause:3.4.1
registry.aliyuncs.com/google_containers/etcd:3.4.13-0
registry.aliyuncs.com/google_containers/coredns:v1.8.0
Use the docker images command to query images
docker images
registry.aliyuncs.com/google_containers/kube-apiserver v1.21.2 106ff58d4308 3 weeks ago 126MB
registry.aliyuncs.com/google_containers/kube-controller-manager v1.21.2 ae24db9aa2cc 3 weeks ago 120MB
registry.aliyuncs.com/google_containers/kube-scheduler v1.21.2 f917b8c8f55b 3 weeks ago 50.6MB
registry.aliyuncs.com/google_containers/kube-proxy v1.21.2 a6ebd1c1ad98 3 weeks ago 131MB
registry.aliyuncs.com/google_containers/pause 3.4.1 0f8457a4c2ec 6 months ago 683kB
registry.aliyuncs.com/google_containers/etcd 3.4.13-0 0369cf4303ff 10 months ago 253MB
It is found that there is no registry.aliyuncs.com/google in the downloaded image_ Containers/coredns: v1.8.0
use the docker command to pull the image
docker pull registry.aliyuncs.com/google_containers/coredns:1.8.0
Kubernetes needs registry.aliyuncs.com/google_ Containers/coredns: v1.8.0, rename the image with the docker tag command
# rename
docker tag registry.aliyuncs.com/google_containers/coredns:1.8.0 registry.aliyuncs.com/google_containers/coredns:v1.8.0
# detele all mirror
docker rmi registry.aliyuncs.com/google_containers/coredns:1.8.0
Run the initialization command again
kubeadm init --config=kubeadm.yml --upload-certs | tee kubeadm-init.log
Prompt success
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Follow the above prompts to configure kubectl
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
# NOT ROOT
chown $(id -u):$(id -g) $HOME/.kube/config
Verify success
kubectl get node
# The ability to print out node information indicates success
NAME STATUS ROLES AGE VERSION
node NotReady control-plane,master 31m v1.21.2