ImageIO.read Error in reading a picture:
javax.imageio.IIOException : Unsupported Image Type_ exception Unsupported Image Type
Adding dependencies to Maven projects can solve this problem
<dependency>
<groupId>com.twelvemonkeys.imageio</groupId>
<artifactId>imageio-jpeg</artifactId>
<version>3.3.2</version>
</dependency>
Start error message
2020-06-12 11:48:54.815 WARN 7728 --- [ Thread-31] com.netflix.discovery.DiscoveryClient : Saw local status change event StatusChangeEvent [timestamp=1591933734815, current=DOWN, previous=UP]
2020-06-12 11:48:54.819 INFO 7728 --- [ Thread-31] com.netflix.discovery.DiscoveryClient : Shutting down DiscoveryClient ...
2020-06-12 11:48:54.831 INFO 7728 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_KOALA-AI-PLATFORM-APP/192.168.100.1:18087 - registration status: 204
2020-06-12 11:48:54.832 INFO 7728 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_KOALA-AI-PLATFORM-APP/192.168.100.1:18087: registering service...
2020-06-12 11:48:54.836 INFO 7728 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_KOALA-AI-PLATFORM-APP/192.168.100.1:18087 - registration status: 204
2020-06-12 11:48:54.837 INFO 7728 --- [ Thread-31] com.netflix.discovery.DiscoveryClient : Unregistering ...
2020-06-12 11:48:54.843 INFO 7728 --- [ Thread-31] com.netflix.discovery.DiscoveryClient : DiscoveryClient_KOALA-AI-PLATFORM-APP/192.168.100.1:18087 - deregister status: 200
2020-06-12 11:48:54.854 INFO 7728 --- [ Thread-31] com.netflix.discovery.DiscoveryClient : Completed shut down of DiscoveryClient
The client can’t be registered in Eureka. After looking around, we found that spring boot starter web is missing in the client POM file, plus
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
SpringCloud-Feign-@PathVariable
Feign pathvariable annotation was empty on param 0.
when using feign, if the parameter contains
@If the parameter is in the form of pathvariable, the corresponding parameter should be marked with value =, otherwise the IllegalStateException exception will be thrown
as
@GetMapping(value = "/payment/consumer/hystrix/ok/get/{id}")
public String payment_ok(@PathVariable Integer id)
The above code will report feign pathvariable annotation was empty on param 0
@GetMapping(value = "/payment/consumer/hystrix/ok/get/{id}")
public String payment_ok(@PathVariable(value="id") Integer id)
So you can go through
1、 The exception is as follows:
exception in thread “main” java.lang.OutOfMemoryError : GC overhead limit exceeded
2、 Explanation:
JDK6 adds a new error type. Thrown when the GC takes a lot of time to free a small space.
It’s usually because the pile is too small. Cause of exception: not enough memory.
3、 Solution:
1. Check whether the system has large memory code or dead loop.
2. You can add the startup parameters of the JVM to limit the use of memory: – XX: – usegcoverheadlimit
1. Install image
docker pull zookeeper:3.6.2
2. Start ZK
docker run --privileged=true -d --name zookeeper -p 2181:2181 \ -v /home/workspace/zookeeper/data:/data \ -v /home/workspace/zookeeper/logs:/datalog \ -d zookeeper:3.6.2
3. Go to ZK image summary
docker exec -it zookeeper /bin/bash
3. View ZK log
docker logs -f zookeeper
4. Validation and FAQs
Refer to my last article:
https://blog.csdn.net/qq_ 42390636/article/details/114986157
My environment
Database type: datetime
Java type: localdatetime
Using the framework mybatisplus
The reason for this exception is that the date field value in the database is empty, so an error is reported
Matlab combined with stm32f407 to develop the program,
error with copymodelfiles ()
causes and solutions:
the simulation model was not saved. Save the simulation model and run it again.
Some web servers need to disable some protocols after deployment. Let’s take tlsv1.0 as an example to talk about how to disable them.
Find the JRE directory in your JDK installation directory and JRE/lib/security in the JRE directory/ java.security File, and then in the file
jdk.tls.disabledAlgorithms=SSLv3 , RC4, md5withrsa, DH keysize & lt; 768, add tlsv1.0.
plugins
Solutions to access denied for user ‘xxx’ @’localhost ‘problem
Key to error reporting
java.sql.SQLException : access denied for user ‘xxx’ @’localhost ‘(using password: Yes). Note that XXX here is not root, root is a permission problem
Solution
Change the user name for the configuration file
You can choose any name you like
And then 🆗 It’s over
Cause analysis
The framework did not get the correct user name of datasource, which is related to the configuration. When such a framework constructs an instance of abstractdriverbaseddatasource, the user name it gets is always the current machine name, that is, XXX. The underlying reason is not clear.
Some projects cannot be imported because they already exist in the But I have modified the project name in the. Project file, but I still can’t import it. I found this article from the Internet. It turns out that you need to find the relevant record in the eclipse workspace and delete it: there is no project with the same name in the workspace, but there must be a place to record the previous project information, which may be… Find the following: XXXXXXXX, workspace,. Metadata,. Plugins\ org.eclipse.core . resources \. Projects folder, delete the folder with the same name
Record how to solve this problem:
MyEclipse is unable to import Java projects. There are two common situations:
1、Some projects cannot be imported because they already exist in the workspace
2、Some projects were hidden because they exist in the workspace directory
Reason: a project with the same name already exists in the workspace, so it cannot be imported.
solve:
1. Modify project name: right click refactor rename or F2
2. Open the. Project file in the project — modify & lt; name & gt; ProjectName & lt; / Name & gt;
3. There is no project with the same name in the workspace. There must be a place to record the previous project information… Find the following: XXXXXXXX, workspace,. Metadata,. Plugins\ org.eclipse.core . resources \. Projects folder, delete the folder with the same name.
Article from http://blog.csdn.net/leo_ Thanks to the author.
Eclipse: unable to open editor: no ID org.eclipse.jdt . ui.CompilationUnitEditor Eclipse: could not open the editor: no editor descriptor for ID org.eclipse.jdt . ui.CompilationUnitEditor )
As you can see here, a workaround for your problem is just move the “~/.eclipse” to another folder.
So:
e.g.:
mv ~/.eclipse somewhereYouWant
When I got this problem, I just:
mv ~/.eclipse home/paladini/Downloads