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The following exception indicates that the encryption algorithm does not meet the key size.   Find the reasons from the Internet as follows, which may be the following. This kind of error may be reported if the versions of both sides of the jdk are inconsistent. But in fact, I use the same local jdk as 1.8-u191. Take a closer look, the th ...

Service provider Eureka client 1. overview 2. steps 2.1 new construction 2.2 startup 2.3 configuration file application 1. overview In fact, it is a client. The service is registered in the eureka service center, so that the service can be provided to other clients. 2. steps 2.1 new constr ...

SpringBoot cooperates with Dubbo, uses @ Service and @ Reference, and group to implement multiple interfaces. To upgrade the company's project, it is necessary to implement springBoot + Dubbo and support multiple implementations of one interface. I met several pits, and I'll record them here. 1. Install Zookeeper stay Official website Download ...

Test questions: How to judge whether to use vnodes? Mainly look at your cassandra.yml configuration file.The default value (3.x) is blank, which is automatically generated by the system. If it is empty, it means that virtual nodes are used, which is enabled by default, and vnodes is used. After deleting a node, it will balance its own data, re ...

Apache Web page optimization concept In an enterprise, only the default configuration parameters are used after deploying Apache, which will cause many problems in the website. In other words, the default configuration is for the previous lower configuration.Server configuration, the previous configuration is not suitable for today's Internet ...

The previous one Service registration and discovery , friends who haven't read it first read the previous one, which is based on the previous one. Ribbon introduction Ribbon is a client side load balancer which gives you a lot of control over the behaviour of HTTP and TCP clients. Feign already uses Ribbon, so if you are using @FeignClient the ...

Explanation of Spark (2) operator Article directory Explanation of Spark (2) operator I. wordcount II. Programming model III. use of RDD data sets and operators 1. Three necessary operators 2. Common operators (Cartesian, cogroup, join) 3. Sorting and aggregation calculation I. wordcount B ...

Catalog Preparation Basic steps Common abnormality Preparation About shiro Three core components: Subject, SecurityManager and Realms Subject: security operation of current user or current user SecurityManage: Security Manager, which manages security operations for all users. Realms: the inte ...

AWStats log analysis system An open source log analysis system developed by Perl It can be used to analyze the access logs of Apache, Samba, Vsftpd, IIS and other servers. Information combined with crond and other scheduled task services can regularly analyze the log content Environmental Science One Linux service host (192.168.13.132) A win ...

Author: Yuanyi, senior development engineer of Alibaba cloud intelligent business group Introduction: Currently, Kafka event sources are supported in knight. How to implement message push based on Kafka? The author of this article will take Alibaba cloud Kafka products as an example to unlock this new posture. background Message queuing for ...