Author Archives: Robins

Mybatis Error: Cause: org.apache.ibatis.builder.BuilderException: Error creating document instance.

Error reporting in mybatis learning: cause: org.apache.ibatis.builder.builderexception: error creating document instance. Cause: com.sun.org.apache.xerces.internal.impl.io.malformedbytesequenceexception: byte 1 of 1-byte UTF-8 sequence is invalid.)

Error details solution

Error details

java.lang.ExceptionInInitializerError
	at com.yy.dao.UserDaoTest.test(UserDaoTest.java:16)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: org.apache.ibatis.exceptions.PersistenceException: 
### Error building SqlSession.
### Cause: org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 1 字节的 UTF-8 序列的字节 1 无效。
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:64)
	at com.yy.utils.MybatisUtils.<clinit>(MybatisUtils.java:20)
	... 23 more
Caused by: org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 1 字节的 UTF-8 序列的字节 1 无效。
	at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:260)
	at org.apache.ibatis.parsing.XPathParser.<init>(XPathParser.java:126)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.<init>(XMLConfigBuilder.java:81)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:77)
	... 25 more
Caused by: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 1 字节的 UTF-8 序列的字节 1 无效。
	at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(UTF8Reader.java:701)
	at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(UTF8Reader.java:567)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1895)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.scanData(XMLEntityScanner.java:1375)
	at com.sun.org.apache.xerces.internal.impl.XMLScanner.scanComment(XMLScanner.java:801)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanComment(XMLDocumentFragmentScannerImpl.java:1034)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2982)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:842)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:771)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)
	at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339)
	at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:258)
	... 28 more


Process finished with exit code -1

When I taught mybatis by myself, I always reported this error because I wrote comments in two. XML files for easy learning

resolvent

Just delete all the Chinese comments in. XML

Just use this to record the error report, so as to avoid wasting time to find solutions when reporting errors again in the future.

[Solved] Daily further: database error: unknown column ‘model’ in ‘field list‘

If you encounter this problem today, record that you have created this’ model ‘field in the database and used querywrapper to initialize the query, And then I reported this mistake, Then I go to the database to query with SQL statements executed by the system; It turned out that it was still a mistake 1054 – Unknown column ‘model’ in ‘field list’ ,
After that, use “*” To query can directly find the data; The field “model” also exists, I don’t know what this is, But locate the problem, start to modify the field. Then there is no problem
Other tables I created have the ‘model’ field, but this problem does not occur
But this is still a question, After reading the explanation of other blogs, I found that I didn’t have the answer I wanted

Hope to have big guys see trouble to teach younger brother, also hope in the future I can give myself a direct answer~

Wrong report

2021-06-10 09:52:09.327 [http-nio-8083-exec-2] ERROR o.jeecg.common.exception.JeecgBootExceptionHandler:57 - 
### Error querying database.  Cause: java.sql.SQLSyntaxErrorException: Unknown column 'model' in 'field list'
### The error may exist in org/jeecg/modules/scw/scwEquipment/mapper/EquipmentMapper.java (best guess)
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT  id,create_by,create_time,update_by,update_time,ip_address,housen_no,house_name,date_time,temp_data,max_num,min_num,aver_num,outhumi_data,inhumi_data,outtemp_data,intemp_data,status,model  FROM scw_equipment     WHERE (housen_no = ?) ORDER BY date_time DESC
### Cause: java.sql.SQLSyntaxErrorException: Unknown column 'model' in 'field list'
; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: Unknown column 'model' in 'field list'
org.springframework.jdbc.BadSqlGrammarException: 
### Error querying database.  Cause: java.sql.SQLSyntaxErrorException: Unknown column 'model' in 'field list'
### The error may exist in org/jeecg/modules/scw/scwEquipment/mapper/EquipmentMapper.java (best guess)
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT id,create_by,create_time,update_by,update_time,ip_address,housen_no,house_name,date_time,temp_data,max_num,min_num,aver_num,outhumi_data,inhumi_data,outtemp_data,intemp_data,status,model  FROM scw_equipment     WHERE (housen_no = ?) ORDER BY date_time DESC
### Cause: java.sql.SQLSyntaxErrorException: 
    Unknown column 'model' in 'field list'; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: Unknown column 'model' in 'field list'
	............(useless information in the middle is omitted)
Caused by: java.sql.SQLSyntaxErrorException: Unknown column 'model' in 'field list'
    ............(useless information in the middle is omitted)

Then I go to the database and query with the SQL statement executed by the system

It turned out to be a mistake 1054 – Unknown column ‘model’ in ‘field list’

After that, use “*” To query, you can directly find the data. This field “model” also exists,

Other tables I created have the ‘model’ field, but they can be found directly

Keras-nightly Import package Error: cannot import name ‘Adam‘ from ‘keras.optimizers‘

Version keras nightly = 2.5.0.dev2021032900

Error information

    from keras.optimizers import Adam
ImportError: cannot import name 'Adam' from 'keras.optimizers'

Solution

error code

from keras.optimizers import Adam
opt = Adam(lr=lr, decay=lr/epochs)

modify

from keras.optimizers import adam_v2
opt = adam_v2.Adam(learning_rate=lr, decay=lr/epochs)

reason

After the keras library is updated, the package cannot be imported in the original way. Open the optimizers.py source code and find the following two key codes. You can see that Adam import has changed, so it is modified as above.

from keras.optimizer_v2 import adam as adam_v2
'adam': adam_v2.Adam,

SLAMBook2 in ch3 code run fatal error: Eigen/Core: No such file or directory

1. First determine whether you have installed eigen3

If not, use the following command to install:

sudo apt-get install libeigen3-dev

2. The installation directory is inconsistent with the directory specified in cmakelists.txt

The default installation directory in cmakelists.txt is as follows:

modify it to the correct path

the final running success is as follows:

java.util.Collections.max() [How to Use]

Description

max(Collection<? extends T>) Method is used to return the largest element of a given set according to the natural order of its elements.

Manifesto

The following is the declaration of the Java. Util. Collections. Max () method.

public static <T extends Object & Comparable<?super T>> T max(Collection<?extends T> coll)

Parameters

coll – The set whose largest element is to be determined.

Return value

Method call returns the largest element of a given collection, according to the natural order of its elements.

Exception

ClassCastException – This exception is thrown if the collection contains elements that are not comparable to each other, such as strings and integers. NoSuchElementException – If the collection is empty, this exception is thrown.

example

The following example shows the usage of Java. Util. Collections. Max()

import java.util.*;

public class CollectionsDemo {
   public static void main(String args[]) { 
      
      // create link list object 
      LinkedList<Integer> list = new LinkedList<Integer>();

      // populate the list  
      list.add(-18);  
      list.add(40);  
      list.add(-45);  
      list.add(12); 

      System.out.println("Max value is: " + Collections.max(list));          
   }  
}

Let’s compile and run the above program, which will produce the following result.

Max value is: 40

postgresql-Database query problem-ERROR: column “t.domainid“ must appear in the GROUP BY clause or be used in an a

ERROR: column “t.domainid” must appear in the GROUP BY clause or be used in an aggregate function

The data table is as follows.

 select * from td_link_1h_d_20210427 limit 10;
 
    time    | linkid | domainid | ipversion |    upbps    |    dnbps    | updisbps | dndisbps  |  upmaxbps   |  dnmaxbps   |  upminbps   |  dnminbps   
------------+--------+----------+-----------+-------------+-------------+----------+-----------+-------------+-------------+-------------+-------------
 1619452800 |   4401 |    10001 |         4 |   147856388 |     5923764 |        0 |         0 |   166378265 |    12533696 |   123212832 |     2247349
 1619452800 |   5002 |    10001 |         6 |           0 |           0 |        0 |         0 |           4 |           4 |           0 |           0
 1619452800 |   5503 |    10001 |         6 |           0 |         149 |        0 |         0 |           2 |         194 |           0 |         102
 1619452800 |   8724 |    10001 |         6 |         238 |           0 |        0 |         0 |         609 |           2 |          23 |           0
 1619452800 |   1201 |    10001 |         4 |   255570975 |  4111481619 |  3035634 |  19703184 |   292787968 |  4751690795 |   209619623 |  3334699801
 1619452800 |   4700 |    10001 |         4 | 19626007220 |  8697825644 |        0 |         0 | 23504765993 |  9930189669 | 16586678202 |  7205462505
 1619452800 |  13249 |    10001 |         6 |     3066257 |      262560 |        0 |        12 |     5817708 |      339458 |      954397 |      217159
 1619452800 |   9156 |    10001 |         4 | 19773923700 |  2984265593 |        0 |         0 | 22335976464 |  3388045463 | 17124116138 |  2543622015
 1619452800 |  11741 |    10001 |         4 |  5628620627 | 20052950343 | 51741713 | 318854796 |  6958633624 | 23485369390 |  4357751762 | 15861228522
 1619452800 |   2700 |    10001 |         4 |   657502770 |  2246692965 |        0 |         0 |   845823645 |  2394743374 |   506699006 |  1880772827
(10 rows)

The following error occurred when querying the database by grouping statistics:

select linkid as "ID",domainid as "Domain",to_char(time::abstime,'YYYYMMDD') as "DATE",to_char(time::abstime,'HH24') as "Time",round(sum(case when time >= '2021-06-07 14:00:00'::abstime::int  and time < '2021-06-08 13:59:59'::abstime::int then upbps else 0 end )/1000/1000,3) as "Mbps",round(sum(case when time >= '2021-05-31 14:00:00'::abstime::int  and time < '2021-06-01 13:59:59'::abstime::int then upbps else 0 end )/1000/1000,3) as "Mbps",round(sum(case when time >= '2021-06-07 14:00:00'::abstime::int  and time < '2021-06-08 13:59:59'::abstime::int then dnbps else 0 end )/1000/1000,3) as "下行速率Mbps",round(sum(case when time >= '2021-05-31 14:00:00'::abstime::int  and time < '2021-06-01 13:59:59'::abstime::int then dnbps else 0 end )/1000/1000,3) as "下行对比速率Mbps",round(sum(case when time >= '2021-06-07 14:00:00'::abstime::int  and time < '2021-06-08 13:59:59'::abstime::int then updisbps else 0 end )/1000/1000,3) as "上行丢弃速率Mbps" from (((select time, linkid,domainid,ipversion,upbps, dnbps, updisbps from td_link_1h_d_20210531 UNION all select time, linkid,domainid,ipversion,upbps, dnbps, updisbps from td_link_1h_d_20210601) UNION all select time, linkid,domainid,ipversion,upbps, dnbps, updisbps from td_link_1h_d_20210607) UNION all select time, linkid,domainid,ipversion,upbps, dnbps, updisbps from td_link_1h_d_20210608)T where (time >= '2021-06-07 14:00:00'::abstime::int  and time < '2021-06-08 13:59:59'::abstime::int )  or  (time >= '2021-05-31 14:00:00'::abstime::int  and time < '2021-06-01 13:59:59'::abstime::int) and (ipversion in (4,6)) group by linkid,time order by linkid,time;

ERROR:  column "t.domainid" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: select linkid as "ID",domainid as "Domain",to_char(time::abs...
                                   ^

After checking a lot of data, it is found that the error means that the domainid field must appear in group by or be used for aggregation function

so I modify the SQL statement, add the domainid field to group by, and then query again

 select linkid as "ID",domainid as "Doamin",to_char(time::abstime,'YYYYMMDD') as "DATE",to_char(time::abstime,'HH24') as "TIME",round(sum(case when time >= '2021-06-07 14:00:00'::abstime::int  and time < '2021-06-08 13:59:59'::abstime::int then upbps else 0 end )/1000/1000,3) as "上行速率Mbps",round(sum(case when time >= '2021-05-31 14:00:00'::abstime::int  and time < '2021-06-01 13:59:59'::abstime::int then upbps else 0 end )/1000/1000,3) as "上行对比速率Mbps",round(sum(case when time >= '2021-06-07 14:00:00'::abstime::int  and time < '2021-06-08 13:59:59'::abstime::int then dnbps else 0 end )/1000/1000,3) as "下行速率Mbps",round(sum(case when time >= '2021-05-31 14:00:00'::abstime::int  and time < '2021-06-01 13:59:59'::abstime::int then dnbps else 0 end )/1000/1000,3) as "下行对比速率Mbps",round(sum(case when time >= '2021-06-07 14:00:00'::abstime::int  and time < '2021-06-08 13:59:59'::abstime::int then updisbps else 0 end )/1000/1000,3) as "上行丢弃速率Mbps" from (((select time, linkid,domainid,ipversion,upbps, dnbps, updisbps from td_link_1h_d_20210531 UNION all select time, linkid,domainid,ipversion,upbps, dnbps, updisbps from td_link_1h_d_20210601) UNION all select time, linkid,domainid,ipversion,upbps, dnbps, updisbps from td_link_1h_d_20210607) UNION all select time, linkid,domainid,ipversion,upbps, dnbps, updisbps from td_link_1h_d_20210608)T where (time >= '2021-06-07 14:00:00'::abstime::int  and time < '2021-06-08 13:59:59'::abstime::int )  or  (time >= '2021-05-31 14:00:00'::abstime::int  and time < '2021-06-01 13:59:59'::abstime::int) and (ipversion in (4,6)) group by linkid,time,domainid order by linkid,time,domainid;

Solved: could not find the task ‘G + + build active file, leetcode algorithm ACM compilation and debugging

Project scenario:

Environment: Ubuntu 20.04

Tool: vscode

Because leetcode can’t debug the code (for members), it’s necessary to configure the local environment to run the code.

Leetcode’s code is to help you configure all the environments. You only need to write the core code, but you need to write all the code yourself during the interview. It’s ACM mode (Baidu ACM). At this time, if you don’t often write all the code, it’s easy to be confused (this is what happened when I was deeply convinced in the online interview)

So it’s necessary to configure the local environment and write the whole process of algorithm implementation, including the compilation process and principle of cpp file, and the debug process can make you more familiar with the code running process.

Reference for compiling environment configuration: https://code.visualstudio.com/docs/cpp/config-linux

No Baidu, no Baidu! Look at the official statement is always the best!!! If you don’t understand English, you can right-click to translate the web page directly.

My task.json configuration: it is automatically generated. The configuration of the computer and the environment is different, so this file may be different.

{
	"version": "2.0.0",
	"tasks": [
		{
			"type": "cppbuild",
			"label": "C/C++: g++ Generate activity files",
			"command": "/usr/bin/g++",
			"args": ["-g", "${file}", "-o", "${fileDirname}/${fileBasenameNoExtension}"],
			"options": {
				"cwd": "${fileDirname}"
			},
			"problemMatcher": [
				"$gcc"
			],
			"group": {
				"kind": "build",
				"isDefault": true
			},
			"detail": "Compilers: /usr/bin/g++"
		}
	]
}

My launch.json:

{
    "version": "0.2.0",
    "configurations": [
      {
        "name": "g++ build and debug active file",
        "type": "cppdbg",
        "request": "launch",
        "program": "${fileDirname}/${fileBasenameNoExtension}",
        "args": [],
        "stopAtEntry": false,
        "cwd": "${workspaceFolder}",
        "environment": [],
        "externalConsole": false,
        "MIMode": "gdb",
        "setupCommands": [
          {
            "description": "Enable pretty-printing for gdb",
            "text": "-enable-pretty-printing",
            "ignoreFailures": true
          }
        ],
        "preLaunchTask": "g++ build active file",
        "miDebuggerPath": "/usr/bin/gdb"
      }
    ]
  }

Problem Description.
I encountered the following situation when configuring task.json for compiling C++ and debugging configuration file launch.json.

Cause Analysis.
Code encountered problems suggest direct google …
Reference: https://stackoverflow.com/questions/59106732/visual-studio-code-debugger-error-could-not-find-the-task-gcc-build-active-f

In your task.json file, no task is labeled as ‘gcc build active file’ which is required as a preLaunchTask in launch.json file.

So you can either change the label of task or change the content of preLaunchTask to make them match.

The answer is clear: task.json file this configuration

"label": "C/C++: g++ Generate activity files",

This configuration must be the same as launch. JSON

"preLaunchTask": "g++ build active file",

Solution:

Configure task.json as follows:

"label": "C/C++: g++ Generate activity files",

To be amended as follows:

"label": "g++ build active file",

—————————The following can be ignored———————————-

As long as the two values are the same. You can be like this: (yes, that’s what I changed it to.)

"label": "g++ build active file  hahaha",

[Solved] ERROR Failed to compile with 3 errors These dependencies were not found: * pdfjs-dist/es5/buil

introduction

Xiao Fang is a junior student. Today, he joined a front-end intern position in a company. He is so proud that he plans to do a big job. Results the card was stuck in NPM run build , and the error message was reported (as follows).

$ npm run build

> [email protected] build /usr/local/docker/gitlab-ee-12.4.1/builds/63s9Rzjq/0/dev_web/system
> vue-cli-service build --mode production


-  Building for production...
 ERROR  Failed to compile with 3 errors PM 3:24:46

These dependencies were not found:

* pdfjs-dist/es5/build/pdf.js in ./node_modules/[email protected]@cache-loader/dist/cjs.js??ref--12-0!./node_modules/[email protected]@thread-loader/dist/cjs.js!./node_modules/[email protected]@babel-loader/lib!./node_modules/[email protected]@cache-loader/dist/cjs.js??ref--0-0!./node_modules/[email protected]@vue-loader/lib??vue-loader-options!./node_modules/[email protected]@vue-pdf/src/vuePdfNoSss.vue?vue&type=script&lang=js&
* worker-loader!pdfjs-dist/es5/build/pdf.worker.js in ./node_modules/[email protected]@cache-loader/dist/cjs.js??ref--12-0!./node_modules/[email protected]@thread-loader/dist/cjs.js!./node_modules/[email protected]@babel-loader/lib!./node_modules/[email protected]@cache-loader/dist/cjs.js??ref--0-0!./node_modules/[email protected]@vue-loader/lib??vue-loader-options!./node_modules/[email protected]@vue-pdf/src/vuePdfNoSss.vue?vue&type=script&lang=js&
* pdfjs-dist/es5/web/pdf_viewer in ./node_modules/[email protected]@vue-pdf/src/pdfjsWrapper.js

To install them, you can run: npm install --save pdfjs-dist/es5/build/pdf.js worker-loader!pdfjs-dist/es5/build/pdf.worker.js pdfjs-dist/es5/web/pdf_viewer
 ERROR  Build failed with errors.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build: `vue-cli-service build --mode production`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2021-06-08T07_24_46_457Z-debug.log
ERROR: Job failed: exit status 1

What？ Can’t even run the project, so you have to be dissuaded on the first day of employment?! Reluctantly, he spent a whole day searching Baidu and Google, but he didn’t find the problem

After the meeting in the afternoon, the leader passed by his work station and saw Xiao Fang, who was in a mess, asked if the environment had been set up. At this time, Xiao Fang was already suffering from this problem and fed it back to the leaders. Unexpectedly, the leader gently put down the water cup in his hand and did a careful investigation on Xiao Fang’s work position. The leader quickly located the node_ However, it seems that this problem is rather intractable, and it has not been solved after half an hour. In the end, the leader put the node in his computer_ Moudels is copied, and the problem is found after replacement it can be seen vaguely that Xiaofang installed the 2.8.335 version of pdfjs dist, while the leader used 2.5.207 , and this newer version is not compatible with the node environment, resulting in an error.

solve

The problem is that in the development team, the front-end project should not put the package lock. JSON file used to lock the version into gitignore, because the most critical factor of development is stability rather than the latest
hope to solve your problem, see you~

[Solved] lua error: no resolver defined to resolve

Use the rest.http module to request no resolver defined to resolve, the error log prompts attempt to index local 'resp', and the code is as follows.

local resp, err = httpc:request_uri("http://xxx.com",{method = "GET",keepalive = false}) 
	ngx.say(  err)

Solution: add DNS configuration, and add resolver configuration in conf configuration file. As shown in the figure below

[Solved] Error: unrecognized arguments: — no site packages

Error: unrecognized arguments: — no site packages

virtualenv --no-site-packages ${G_VENV_DIR}
usage: virtualenv [--version] [--with-traceback] [-v | -q] [--app-data APP_DATA] [--clear-app-data] [--discovery {builtin}] [-p py] [--creator {builtin,cpython3-win,venv}] [--seeder {app-data,pip}] [--no-seed] [--activators comma_sep_list]
                  [--clear] [--system-site-packages] [--copies] [--download | --no-download] [--extra-search-dir d [d ...]] [--pip version] [--setuptools version] [--wheel version] [--no-pip] [--no-setuptools] [--no-wheel]
                  [--symlink-app-data] [--prompt prompt] [-h]
                  dest
virtualenv: error: unrecognized arguments: --no-site-package

If the version is greater than 20 and the virtualenv version is greater than 20, it is the default no site packages parameter

View virtualenv version

virtualenv --version

1. Downgrading

pip install --upgrade virtualenv==16.7.9

2. remove –no-site-package

virtualenv ${G_VENV_DIR}

[Solved] Error running ‘WebApplication‘: Command line is too long. Shorten command line for WebApplication or

Console error message when Java starts

Error information:

Error running 'WebApplication': 
Command line is too long. Shorten command line for WebApplication or also for Spring Boot default configuration