Category Archives: Error

How to Solve MVC Error: Build failed.

The situation shown in the figure appears

Solution:

Step 1:

Delete all files in the migrations directory in the figure

Step 2:

Delete this package and reinstall it!!

PM> add-migration Intial_one
Build started...
Build failed.
PM> add-migration Intial_one
Build started...
Build failed.
PM> add-migration Intial_one
Build started...
Build failed.
PM> add-migration IntialCreate
Build started...
Build failed.
PM> 
PM> 
PM> 
PM> 
PM> add-migration IntialCreate
Build started...
Build succeeded.
Microsoft.EntityFrameworkCore.Infrastructure[10403]
      Entity Framework Core 6.0.2 initialized 'POKEMMONContext' using provider 'Microsoft.EntityFrameworkCore.SqlServer:6.0.2' with options: None
To undo this action, use Remove-Migration.
PM> add-

OK

[Solved] Neo4j error: Import-Module & neo4j Neo.ClientError.Security.Unauthorized

Error reporting record

1. Import module: failed to load the specified module. Solution:

Solution: find the neo4j PS1 file in the bin directory, open it, find the import module, and change the relative path to the absolute path, that is,

"D:\Neo4j\neo4j-community-3.5.25\bin\Neo4j-Management.psd1"

2. When changing the password, neo4j Neo.ClientError.Security.Unauthorized

Solution: open neo4j.conf in the conf folder and delete the comment in front of #dbms.security.auth_enabled=false

Cmake Compile opencv error: The system is: Windows – 10.0.19042 – AMD64 (Log File)

After clicking configure, an error will be reported by default. Check the log file:

The system is: Windows - 10.0.19042 - AMD64

Reason: the compiler is not selected correctly. You should select the one installed on your computer. For example, the 2019 version I installed is changed to 2019.

Solution: click file->delete cache to reselect the compiler.

Eclipse start project error: Errors occurred during the build. Errors running builder ‘Integrated External Tool Builder’ on…

When eclipse starts the project, it suddenly reports: Errors occurred during the build. Errors running builder ‘Integrated External Tool Builder’ on project ‘acc-bid’. The builder launch configuration could not be found. The builder launch configuration could not be found.

The project kept building when it started, so I unchecked the validation box, which resulted in the above error

And when you look at buliders again, you bring a red cross

If you remove the fork, you won’t report an error

How to Solve Webpack CacheGroups Error 

[webpack-cli] Invalid configuration object. Webpack has been initialized using a configuration object that does not match the API schema.
 - configuration.optimization.splitChunks has an unknown property 'CacheGroups'. These properties are valid:
   object { automaticNameDelimiter?, cacheGroups?, chunks?, defaultSizeTypes?, enforceSizeThreshold?, fallbackCacheGroup?, filename?, hidePathInfo?, maxAsyncRequests?, maxAsyncSize?, maxInitialRequests?, maxInitialSize?, maxSize?, minChunks?, minRemainingSize?, minSize?, minSizeReduction?, name?, usedExports?}
   -> Options object for splitting chunks into smaller chunks.

Previous version:

  CacheGroups:{
                vendor:{
                    test:/[\\/]node_modules[\\/]/,
                    name:'vendors',
                    chunks:'all'
                }
            }

The solution is to reduce the version or follow the new writing method

New writing:

cacheGroups: {
                commons: {
                  test: /[\\/]node_modules[\\/]/,
                  name: 'vendors',
                  chunks: 'all',
                },
              },

IDEA: How to Solve Springboot Project install Error 

Found multiple occurrences of org.json.JSONObject on the class path:

    jar:file:/C:/Users/Administrator/.m2/repository/org/json/json/20160810/json-20160810.jar!/org/json/JSONObject.class
    jar:file:/C:/Users/Administrator/.m2/repository/com/vaadin/external/google/android-json/0.0.20131108.vaadin1/android-json-0.0.20131108.vaadin1.jar!/org/json/JSONObject.class

You may wish to exclude one of them to ensure predictable runtime behavior

Solution：

Add to pomz: com.vaadin.external.google dependency ignore can be

<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.vaadin.external.google</groupId>
					<artifactId>android-json</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

Node Kubelet Error: node “xxxxx“ not found [How to Solve] 

11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.108952     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.209293     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.310543     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.411121     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.511949     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.612822     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.713249     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.781263     974 controller.go:144] failed to ensure lease exists, will retry in 7s, error: leases.coordination.k8s.io "localhost.localdomain" is forbidden: User "system:node:k8s222" cannot get resource "leases" in API group "coordination.k8s.io" in the namespace "kube-node-lease": can only access node lease with the same name as the requesting node
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.813355     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.913495     974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"

1.1 this node is always notready

[root@crust-m01 ~]# kubectl get node
NAME        STATUS     ROLES                  AGE   VERSION
k8s220   NotReady   control-plane,master   44d   v1.21.3
k8s221   NotReady   <none>                 44d   v1.21.3
k8s222   NotReady   <none>                 44d   v1.21.3

1.2 view details of this node

[root@localhost ~]# kubectl describe node k8s221


……
Unschedulable:      false
Lease:
  HolderIdentity:  k8s221
  AcquireTime:     <unset>
  RenewTime:       Tue, 28 Sep 2021 14:37:08 +0800
Conditions:
  Type             Status    LastHeartbeatTime                 LastTransitionTime                Reason              Message
  ----             ------    -----------------                 ------------------                ------              -------
  MemoryPressure   Unknown   Tue, 28 Sep 2021 14:32:16 +0800   Tue, 28 Sep 2021 14:38:17 +0800   NodeStatusUnknown   Kubelet stopped posting node status.
  DiskPressure     Unknown   Tue, 28 Sep 2021 14:32:16 +0800   Tue, 28 Sep 2021 14:38:17 +0800   NodeStatusUnknown   Kubelet stopped posting node status.
  PIDPressure      Unknown   Tue, 28 Sep 2021 14:32:16 +0800   Tue, 28 Sep 2021 14:38:17 +0800   NodeStatusUnknown   Kubelet stopped posting node status.
  Ready            Unknown   Tue, 28 Sep 2021 14:32:16 +0800   Tue, 28 Sep 2021 14:38:17 +0800   NodeStatusUnknown   Kubelet stopped posting node status.
……

1.3 view kubelet logs on this node

[root@crust-m2 ~]# service kubelet status -l
Redirecting to /bin/systemctl status  -l kubelet.service
● kubelet.service - kubelet: The Kubernetes Node Agent
   Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
  Drop-In: /usr/lib/systemd/system/kubelet.service.d
           └─10-kubeadm.conf
   Active: active (running) since 二 2021-09-28 14:51:57 CST; 4min 6s ago
     Docs: https://kubernetes.io/docs/
 Main PID: 21165 (kubelet)
    Tasks: 19
   Memory: 43.0M
   CGroup: /system.slice/kubelet.service
           └─21165 /usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib/kubelet/config.yaml --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.4.1

9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.119645   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.220694   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.321635   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.385100   21165 eviction_manager.go:255] "Eviction manager: failed to get summary stats" err="failed to get node info: node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.422387   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.523341   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.624021   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.724418   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.825475   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.926199   21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"

2. [troubleshooting]

The startup command of log output in 1.3 is as follows:

/usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib/kubelet/config.yaml --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.4.1

 

There is no problem viewing and analyzing all configuration files in the startup command

The error err = "node" localhost. Output in 1.3 was found localdomain "Not found
the information of kubectl get node on the master is k8s220, k8s221, k8s222

conclusion
when kubernetes was installed before, the name of the master was k8s220, and the node was k8s221, k8s222, because /etc/hostname was written as localhost.localdomain by default, kubelet has always been report errors

3. [modification]

Modify the hostname file, execute the hostname command, modify the server name,

Restart kubelete

css-rcurlyexpected Error: css-rcurlyexpected at-rule, or selector expected, Do not use empty rulesets

● questions:

● the errors are:

css-rcurlyexpected
at-rule or selector expected
Do not use empty rulesets

But the style works normally.

● cause

1. set “vetur.validation.style”: false in setting.json,
2. add @charset “utf-8” to the first line of style;
But the main reason for this is that the page language mode is set incorrectly, just use the default .vue will be set to html mode, so it will report an error

● Solution 1:

Click in to change to Vue mode

● Solution 2:

Set the setting in setting.json to allow the system to modify the language mode of the .vue file to vue by default

"files.associations": {
   "*.vue": "vue",
 },

How to Solve Arxiv Upload with PDFLatex Error

The basic process of uploading latex files to arxiv has been clearly explained by other bigwigs, here is the main record of the problems I encountered and the solutions.

Background: I used the ACS achemso template in overleaf coding.

Need to pay attention to.

1. the reference format is bbl instead of bib, bbl is a compiled intermediate file that can be exported directly after overleaf compilation.

2. in the first five lines of .tex add \pdfoutput=1%For ARXIV

Problems encountered.

In overleaf compile completely fine file upload to arxiv after reporting an error: \pdfoutput=1%For ARXIV

 

Solution:

1. may be a coding problem, add \UseRawInputEncoding in the first line of .tex

2. arxiv file transfer when the original file is deleted and replaced by a new file, sometimes the update will not be timely, or the compiled results of the original file, you can go back to the original interface to refresh or simply re-login.

Windows: How to Solve PCL C2065 Error

Solution of PCL running error under Windows

Configuration: vs2019 + pcl1 11.1+CMake3. twenty-two

The program has no problem, but there are a lot of error codes when running

Kdtree program

Solution:

Copy the program to a new txt file, save it, and then copy it to the vs2019 cpp document

Rerun results

reason

Maybe the program is downloaded from GitHub, and the coding method is wrong. It needs to be copied to TXT document for transcoding

[Solved] graphviz Error: failed to execute [‘dot’, ‘-Tsvg’], make sure the Graphviz executables are on your systems’ PATH

 

graphviz error: failed to execute [‘dot’, ‘-Tsvg’], make sure the Graphviz executables are on your systems’ PATH

1. Download graphviz

Go to https://graphviz.org/download/ to download graphviz (64-bit system must choose 64-bit Installer, can not choose ZIP)

2. Installation

In the following interface, you must select the red option (if not selected, you can only manually add environment variables later), and then you can finish all the way.

3. Test

win + R, type cmd, open the cmd window, use dot -version test, can display the version information is installed successfully
(Do not blindly open CMD, if the open is C:\WINDOWS\system32> that can not be measured)

Note: if not, restart anaconda.

Oracle VM VirtualBox open replication virtual machine Error

Copy an existing virtual machine and register it to VirtualBox with the same UUID, error message: which has the same UUID as an existing virtual machine.

which has the same UUID as an existing virtual machine.

Workaround (my VirtualBox version: 6.1).

cmd switch to the VirtualBox installation directory and enter.

C:\Program Files\Oracle\VirtualBox>VBoxManage internalcommands sethduuid "E:\VirtualBox\ubuntu 20.04\ubuntu 20.04.vdi"