Error in starting Tomcat: JasperException: java.lang.ClassNotFoundException

After Ubuntu is installed, start tomcat9, open the test website 127.0.0.1:8080, and report an error of 500.[in HTTP protocol, 500 Internal Server Error is the response status code indicating the server-side error, which means that the requested server encounters an unexpected situation and prevents it from executing the request] Type exception ...

Posted on Mon, 04 Nov 2019 09:23:59 -0500 by waverider303

Dubbo application migration to Kubernetes recommendation

Migration of Dubbo application to docker Dubbo is a set of open-source service governance and rpc framework of Alibaba. The service provider publishes its own service through zookeeper, and then the service caller obtains the ip and port of the service through zk. The Dubbo client automatically selects and invokes the service provider through ...

Posted on Mon, 04 Nov 2019 05:16:40 -0500 by tyson

php common plug-ins

original intention The following is a summary of some easy-to-use extensions found and used in the development, which will be updated constantly. If there is a good extension recommendation, you can also leave a message and I will add it in time for your own and everyone's use. 1. Timed task management extension ht ...

Posted on Sun, 03 Nov 2019 12:53:05 -0500 by ivi

Elk (elastic search, logstast,kibana)filebeat deployment and Practice

1. elk descriptionelk full name:elasticsearch:Is a distributed, high expansion, high real-time search and data analysis enginelogstash:It is an open source server-side data processing pipeline, which can collect data from multiple sources at the same time, transform the data, and then send the data to your favorite "repository"; for ...

Posted on Sun, 03 Nov 2019 08:24:14 -0500 by GetReady

Installation and deployment of Kubernetes production environment installation preparation based on Kubernetes v1.14.0

Install based on CentOS version 7.6.1810 1. System upgrade and settings Modify server name Hostnamectl set hostname modified name Upgrade CentOS package and kernel yum -y updateyum -y install yum-plugin-fastestmirroryum install -y epel-releaserpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.orgrpm -Uvh http://www.elrepo.org/elrepo-rel ...

Posted on Sun, 03 Nov 2019 06:34:12 -0500 by chasiv

ab stress test, working mode and directory attribute optimization of Apache Web page in-depth optimization

ab pressure test tool Apache has its own stress testing tool ab, which is simple and easy to use, and can simulate various conditions to send test requests to the Web server. ab tool can directly initiate test request in the local area of Web server, which is very important to understand the processing performance of the server, because it doe ...

Posted on Sun, 03 Nov 2019 04:24:35 -0500 by AP81

Brief introduction and basic commands of Linux

I. Linux Linux command base Linux command help Basic operation of directory and file Linux family Redhat three certifications (open source but not free) --- community (system developer) --- Centos (server side) Ubuntu's best client system, open source and free (software developers) Debian --- "kali Linux (special tools take little reso ...

Posted on Sun, 03 Nov 2019 01:47:33 -0400 by BoostinZX

Installation and configuration of link monitoring tool pinpoint

Tags: APMInitial knowledge of pinpoint call chain tool === In this paper, we will focus on the architecture, installation and deployment of the pinpoint tool; 1. Introduction to pinpoint tool:                         . W ...

Posted on Sun, 03 Nov 2019 01:37:11 -0400 by ubersmuck

Huawei's single arm routing -- actual combat

Single arm routing DefinitionSingle arm routing (router-on-a-stick) refers to the interconnection and interworking between different VLAN s (virtual LANs) isolated from each other by configuring a sub interface (or "logical interface", there is no real physical interface) on one interface of the router.ExperimentIn ensp, draw the top ...

Posted on Sun, 03 Nov 2019 01:04:16 -0400 by michaelh613

Prometheus: Prometheus monitors Windows machines

I. install WMI exporter First install the WMI? Exporter on the Windows machine you want to monitor. Download address of WMI exporter: https://github.com/martinlindhe/wmi_exporter/releases   After downloading, double-click to complete the installation. After the installation is completed, a self starting service will be created automatical ...

Posted on Sat, 02 Nov 2019 23:45:23 -0400 by rougue