Java Lang.classcastexception: class [c cannot be cast to class java.lang.string
stay springboot Integrate shiro There is java.lang.ClassCastException: class C cannot be cast to class java.lang.String C and java.lang.String are ...
2022-05-29 09:57【WZP】
read more[exception] misconf redis is configured to save RDB snapshots, but it is currently not able to persist on di
Description of the exception ： redis Abnormal setting value ： 127.0.0.1:6379 set password 123456 error MISCONF Redis is configured to save RDB snaps...
2022-05-29 09:58【WZP】
read moreSpring boot application in default package error in spring boot
Spring Boot appear Spring Boot Application in default package wrong stay stack overflow Solutions seen on the Internet ：application.java Files c...
2022-05-29 09:58【WZP】
read moreVue admin template does not send info request when logging in
Recently in use springboot Integrate vue admin template when , After logging in, use the browser network Found that only login request , Not sent in...
2022-05-29 09:58【WZP】
read moreMybatis plus auto fill failed to fill the problem
In the use of mybaits plus On auto fill of , Auto fill failed , The project is to use maven Multi module , Realize MetaObjectHandler Classes o...
2022-05-29 09:58【WZP】
read moreVue warn]: invalid prop: type check failed for prop "Min". Expected number with value 0, got string
element ui Component error ： Vue warn : Invalid prop: type check failed for prop “min”. Expected Number with value 0, got String with value “0”. Wr...
2022-05-29 09:58【WZP】
read moreNginx: [emerg] createfile() "f:\ desktop \nginx-1.12.2/conf/nginx.conf" failed (3: the system cannot find t
In the installation nginx when , start-up nginx Later nginx: emerg CreateFile 'F: desktop nginx 1.12.2/conf/nginx.conf' failed 3: The system cann...
2022-05-29 09:58【WZP】
read moreJava Lang.noclassdeffounderror: javax/xml/bind/datatypeconverter
solve jdk11 Medium java.lang.NoClassDefFoundError: javax/xml/bind/DatatypeConverter Add the following dependencies to resolve ： jaxb Dependency pac...
2022-05-29 09:58【WZP】
read moreHow to avoid data loss when redis is down? (AOF log)
On a daily basis , We usually put redis Use as a cache . But once the server goes down , All data in memory will be lost . at present ,redis Ther...
2022-05-29 09:59【WZP】
read moreWhy is single thread redis so fast?
I believe many people will be asked in the interview ：Redis Is it a single thread ？ Why can a single thread be so fast ？ Redis Is it a single thread ...
2022-05-29 09:59【WZP】
read moreHow does redis achieve rapid recovery after downtime? (RDB memory snapshot)
AOF What is recorded is the operation command , Not the actual data , So use AOF Method for fault recovery , You need to execute the operation logs...
2022-05-29 09:59【WZP】
read moreHow does the redis master-slave database achieve data consistency?
Use AOF and RDB, If redis There was a crash , You can play back the log and read in again RDB Snapshot to recover data , Ensure as little data...
2022-05-29 09:59【WZP】
read moreEclispe remote connection Hadoop cluster error reporting solution
Report errors ：Invalid Hadoop Runtime specified; please click ‘Configure Hadoop install directory’ or fill in library location input field 1. Proble...
2022-05-29 10:00【A lazy sheep who knows code】
read moreHadoop reports an error info ipc Client: retrying connect to server
Report errors INFO ipc.Client: Retrying connect to server 1. Problem extension Test cluster components , Use IDEA I hit jar The package is thrown...
2022-05-29 10:00【A lazy sheep who knows code】
read moreHive installation configuration details (provide experimental platform)
One . Hive Installation and configuration 1. Preposition Direct link to the experimental platform https://www.educoder.net/paths/216 Task des...
2022-05-29 10:00【A lazy sheep who knows code】
read moreSolve the problem that the external network cannot access the HDFS file system ①
Local HDFS Of javaAPI Access cloud server Hadoop Problem solving 1. The initial question Use the virtual environment on the cloud to build a goo...
2022-05-29 10:00【A lazy sheep who knows code】
read moreDetailed process of idea remote connection to Oracle database (with error correction method)
1. Set the drive Click on the navigation bar View Tool Windows Datebase image 20220226120917221 https://img blog.csdnimg.cn/img convert/b33271a536...
2022-05-29 10:00【A lazy sheep who knows code】
read moreSolve the problem that the external network cannot access the HDFS file system ②
Local HDFS Of javaAPI Access cloud server Hadoop Problem extension 1. Problem extension Extended to 2021 12 29 Japan Solve the problem that th...
2022-05-29 10:00【A lazy sheep who knows code】
read moreMachine learning theory (14): supervised evaluation of clustering algorithm: purity v.s. entropy
List of articles The purity Purity Purity 4 entropy Entropy Entropy 29 Clustering algorithm is a typical unsupervised algorithm , So why is th...
2022-05-29 10:02【Warm baby can fly】
read moreUnix network programming 11: name and address translation
Name and address translation Series navigation ： 《Unix Network programming 》 note The domain name system brief introduction The domain name...
2022-05-29 10:02【BbsMax】
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