Author Archives: Robins

Nginx Error: SSL: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small


ubuntu20.04 nginx startup error:

root@ubuntu:/etc/nginx/conf.d# nginx -s reload
nginx: [warn] the “ssl” directive is deprecated, use the “listen … ssl” directive instead in /etc/nginx/conf.d/xx.conf:12
nginx: [emerg] SSL_CTX_use_certificate("/etc/nginx/conf.d/crt/server.crt") failed (SSL: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small)

 

Solution: When generating the secret key, the command is as follows
openssl genrsa -des3 -out server.key 1024
Modify to
openssl genrsa -des3 -out server.key 2048

kernel module insert error: ERROR: could not insert module …../file.ko : File exits

When inserting the kernel module, I was prompted that the file already exists, but before that, when I inserted the kernel module, I was prompted that I could not insert normally. In order to avoid problems with the module, I decided to delete the original module and insert it again. Here is a method for you.

Check the current modules

lsmod

You can see that there are running modules in it. If you find the module you want to insert, delete it

sudo rmmod openvswitch

Then re insert it

sudo insmod datapath/linux/openvswitch.ko

Then you can insert the module normally.

[Solved] SSM Project Error: Error during artifact deployment. See server log for details.

SSM project reports error during artifact deployment See server log for details. Solution

First look at the Tomcat localhost log and find:

java.lang.ClassNotFoundException:org.springframework.web.context.ContextLoaderListener

At this time, we can set this in the idea to solve the error.

In idea, click File > Project Structure > Artifacts

Delete the jar file at the same level as web-inf

Right-click the project name in the right output layout and select Put into Output Root.

After execution, you can see that the jar files are placed in the Lib directory of WEB-INF, and click OK.

Finally, the restart takes effect.

spark Program Error: ERROR01——java.lang.NullPointerException

Run Spark Program in idea and find that datafram can perform df.show() but just df.count() will display the following exception information:

2022-03-25 17:56:13,691 ERROR executor.Executor: Exception in task 14.0 in stage 7.0 (TID 222)
java.lang.NullPointerException
	at $line33.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw.$anonfun$rdd01$1(<console>:26)
	at scala.collection.Iterator$$anon$10.next(Iterator.scala:461)
	at scala.collection.Iterator$$anon$11.nextCur(Iterator.scala:486)
	at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:492)
	at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:460)
	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.agg_doAggregateWithKeys_0$(Unknown Source)
	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown Source)
	at org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
	at org.apache.spark.sql.execution.WholeStageCodegenExec$$anon$1.hasNext(WholeStageCodegenExec.scala:759)
	at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:460)
	at org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:140)
	at org.apache.spark.shuffle.ShuffleWriteProcessor.write(ShuffleWriteProcessor.scala:59)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:99)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:52)
	at org.apache.spark.scheduler.Task.run(Task.scala:131)
	at org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:506)
	at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1462)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:509)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
2022-03-25 17:56:13,728 WARN scheduler.TaskSetManager: Lost task 14.0 in stage 7.0 (TID 222) (westgis-134 executor driver): java.lang.NullPointerException
	at $line33.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw.$anonfun$rdd01$1(<console>:26)
	at scala.collection.Iterator$$anon$10.next(Iterator.scala:461)
	at scala.collection.Iterator$$anon$11.nextCur(Iterator.scala:486)
	at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:492)
	at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:460)
	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.agg_doAggregateWithKeys_0$(Unknown Source)
	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown Source)
	at org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
	at org.apache.spark.sql.execution.WholeStageCodegenExec$$anon$1.hasNext(WholeStageCodegenExec.scala:759)
	at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:460)
	at org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:140)
	at org.apache.spark.shuffle.ShuffleWriteProcessor.write(ShuffleWriteProcessor.scala:59)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:99)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:52)
	at org.apache.spark.scheduler.Task.run(Task.scala:131)
	at org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:506)
	at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1462)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:509)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

The reason for this error is that there is a null value in the dataframe attribute in the previous processing, using na.drop() is removed and the error is resolved.

df05=df05.select("direction","station_name","order_no","lat","lng").na.drop()

How to Solve Error-SpringCloud-Feign and Sentinel integrate error

Feign integrate Sentinel error:

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 03-31 10:45:01:182 ERROR 21840 --- [ main] o.s.boot.SpringApplication : Application run failed
03-31 10:45:01:182 ERROR 21840 — [ main] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘orderService’: Unsatisfied dependency expressed through field ‘userClient’; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name ‘cn.itcast.feign.clients.UserClient’: Requested bean is currently in creation: Is there an unresolvable circular reference?
at org.springframework.beans.factory.annotation)

1SpringCloud-Feign integrate Sentinel error:

03-31 10:44:59:906  INFO 21840 --- [           main] cn.itcast.order.OrderApplication         : No active profile set, falling back to default profiles: default
03-31 10:45:00:320  INFO 21840 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=15e39e82-ae83-372c-bf12-c9f1083aeff7
03-31 10:45:00:441  INFO 21840 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'spring.cloud.sentinel-com.alibaba.cloud.sentinel.SentinelProperties' of type [com.alibaba.cloud.sentinel.SentinelProperties] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
03-31 10:45:00:442  INFO 21840 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'com.alibaba.cloud.sentinel.custom.SentinelAutoConfiguration' of type [com.alibaba.cloud.sentinel.custom.SentinelAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
03-31 10:45:00:596  INFO 21840 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8088 (http)
03-31 10:45:00:604  INFO 21840 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
03-31 10:45:00:604  INFO 21840 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.43]
03-31 10:45:00:605  INFO 21840 --- [           main] o.a.catalina.core.AprLifecycleListener   : Loaded Apache Tomcat Native library [1.2.31] using APR version [1.7.0].
03-31 10:45:00:605  INFO 21840 --- [           main] o.a.catalina.core.AprLifecycleListener   : APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
03-31 10:45:00:606  INFO 21840 --- [           main] o.a.catalina.core.AprLifecycleListener   : APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
03-31 10:45:00:608  INFO 21840 --- [           main] o.a.catalina.core.AprLifecycleListener   : OpenSSL successfully initialized [OpenSSL 1.1.1l  24 Aug 2021]
03-31 10:45:00:691  INFO 21840 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
03-31 10:45:00:691  INFO 21840 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 769 ms
03-31 10:45:01:122  WARN 21840 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'orderService': Unsatisfied dependency expressed through field 'userClient'; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'cn.itcast.feign.clients.UserClient': Requested bean is currently in creation: Is there an unresolvable circular reference?
03-31 10:45:01:124  INFO 21840 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
03-31 10:45:01:132  INFO 21840 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
03-31 10:45:01:182 ERROR 21840 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'orderService': Unsatisfied dependency expressed through field 'userClient'; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'cn.itcast.feign.clients.UserClient': Requested bean is currently in creation: Is there an unresolvable circular reference?
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:660) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1425) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:897) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) ~[spring-context-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.9.RELEASE.jar:2.3.9.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.9.RELEASE.jar:2.3.9.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.9.RELEASE.jar:2.3.9.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:405) [spring-boot-2.3.9.RELEASE.jar:2.3.9.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.9.RELEASE.jar:2.3.9.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.9.RELEASE.jar:2.3.9.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.9.RELEASE.jar:2.3.9.RELEASE]
	at cn.itcast.order.OrderApplication.main(OrderApplication.java:26) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'cn.itcast.feign.clients.UserClient': Requested bean is currently in creation: Is there an unresolvable circular reference?
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.beforeSingletonCreation(DefaultSingletonBeanRegistry.java:355) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:227) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1109) ~[spring-context-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at com.alibaba.cloud.sentinel.feign.SentinelFeign$Builder$1.create(SentinelFeign.java:84) ~[spring-cloud-starter-alibaba-sentinel-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:64) ~[feign-core-10.10.1.jar:na]
	at feign.Feign$Builder.target(Feign.java:269) ~[feign-core-10.10.1.jar:na]
	at org.springframework.cloud.openfeign.HystrixTargeter.target(HystrixTargeter.java:38) ~[spring-cloud-openfeign-core-2.2.7.RELEASE.jar:2.2.7.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.loadBalance(FeignClientFactoryBean.java:338) ~[spring-cloud-openfeign-core-2.2.7.RELEASE.jar:2.2.7.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.getTarget(FeignClientFactoryBean.java:369) ~[spring-cloud-openfeign-core-2.2.7.RELEASE.jar:2.2.7.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:347) ~[spring-cloud-openfeign-core-2.2.7.RELEASE.jar:2.2.7.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientsRegistrar.lambda$registerFeignClient$0(FeignClientsRegistrar.java:240) ~[spring-cloud-openfeign-core-2.2.7.RELEASE.jar:2.2.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.obtainFromSupplier(AbstractAutowireCapableBeanFactory.java:1235) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1307) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1227) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:657) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE]
	... 21 common frames omitted

Solution:

Go to the parent pom file and modify the version of springcloud, change Hoxton.SR10 to Hoxton.SR9, and re-import the pom file

[Solved] CMake Error: Error: generator : Unix Makefiles

The following problems occurred when using cmake – G “MinGW makefiles”

CMake Error: Error: generator : Unix Makefiles
Does not match the generator used previously: MinGW Makefiles
Either remove the CMakeCache.txt file and CMakeFiles directory or choose a different binary directory.

The reason is that it has been generated before, and other problems have not been deleted before regeneration
Solution:
1. Delete the previously generated files inside the build file
2. Create a new folder, cd to the new folder and re-cmake

[Solved] Syntax Error: Error: No ESLint configuration found & TypeError: eslint.CLIEngine is not a constructor

Here we will show you how to solve the two common error:

  1. Syntax Error: Error: No ESLint configuration found.
  2. Syntax Error: TypeError: eslint.CLIEngine is not a constructor

 

Solution:

Error 1: Syntax Error: Error: No ESLint configuration found.

Method 1:
1 Global install eslint: npm i eslint -g
2 Generate configuration file: eslint –init
3 Set according to your own project requirements:

√ How would you like to use ESLint?· problems
√ What type of modules does your project use?· esm
√ Which framework does your project use?· vue
√ Does your project use TypeScript?· No/Yes
√ Where does your code run?· browser
√ What format do you want your config file to be in?· JavaScript
The config that you've selected requires the following dependencies:

eslint-plugin-vue@latest
?Would you like to install them now with npm?» Yes

Method 2:
1 Install eslint in the project: npm install eslint –save-dev
2 Build profile: ./node_modules/.bin/eslint –init
3. After successful initialization, a will be generated a .eslintrc.js file in the project root directory, file content:

module.exports = {
    "env": {
        "browser": true,
        "es2021": true
    },
    "extends": [
        "eslint:recommended",
        "plugin:vue/essential"
    ],
    "parserOptions": {
        "ecmaVersion": 12,
        "sourceType": "module"
    },
    "plugins": [
        "vue"
    ],
    "rules": {
    }
};

Error 2: Syntax Error: TypeError: eslint. CLIEngine is not a constructor

Solution: open package JSON delete and re run the following code (stop the project and re NPM run serve)

after deletion, the eslint syntax verification of the project will become invalid and can run successfully (NPM run serve needs to be re run)

Errorjava Compilation failed internal java compiler error [How to Solve]

Solution:
1. Check the JDK of project（Ctrl+Alt+shift+S）
File ->Project Structure->Project Settings ->Project

2. Check the JDK of project（Ctrl+Alt+shift+S）
File ->Project Structure->Project Settings -> Modules -> (the name you need to modify) -> Sources ->

3. Check the configuration of Java
File ->Setting ->Build,Execution,Deployment -> Compiler -> Java Compiler

If the above three steps still fail
Clear IDEA cache Restart IDEA
File->Invalidate Caches/Restart

[Solved] Error from server (InternalError): error when creating “ingress.yaml”: Internal error occurred: fail

When using the ingress exposure service, kubectl apply -f ingress.yaml reports the following error.
Reported error:

Error from server (InternalError): error when creating “ingress.yaml”: Internal error occurred: failed calling webhook “validate.nginx.ingress.kubernetes.io”: failed to call webhook: Post “https://ingress-nginx-controller-admission.ingress-nginx.svc:443/networking/v1/ingresses?timeout=10s”: x509: certificate has expired or is not yet valid: current time 2022-03-26T14:45:34Z is before 2022-03-26T20:16:32Z

 

Solution:
Check kubectl apply -f ingress.yaml

kubectl get validatingwebhookconfigurations

Delete ingress-nginx-admission

kubectl delete -A ValidatingWebhookConfiguration ingress-nginx-admission

Then execute

kubectl apply -f ingress.yaml

[Solved] cx_Oracle.DatabaseError: Error while trying to retrieve text for error ORA-01804

Error: 

cx_Oracle connect oracle error:

cx_Oracle.DatabaseError: Error while trying to retrieve text for error ORA-01804
sample code:
import cx_Oracle
conn = cx_Oracle.connect(user,pwd, self.ois_tns)

 

Solution: Check the environment variable settings for oracle in the .bash_profile under the Linux user on the server executing the code, as follows.

export ORACLE_HOME=/test/home/oracle/product/11.2.0.4
export LD_LIBRARY_PATH=O R A C L E H O M E / l i b e x p o r t T N S A D M I N = ORACLE_HOME/lib export TNS_ADMIN=ORACLEHOME/libexportTNSADMIN=ORACLE_HOME/network/admin