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Key contents Three zookeeper nodes are required Four solr nodes. Using pseudo distributed to implement solr cluster. Three zookeeper instances and four tomcat instances are required, which can be simulated on a virtual machine. More than 1G memory is recommended for virtual machines. Solr instance building Step 1: crea ...

There are so many specific features of Spring Session. The specific content can be learned from the document. The author makes a summary. The features of Spring Session include but are not limited to the following: Use GemFire to build httpSession of C/S architecture (not concerned) Use the third-party warehouse to realize the cluster sessi ...

Learning notes are notes made according to my own needs and understanding after learning the core technology of Spring Boot 2.0 in-depth practice by brother Ma on mooc.com. Preface Spring boot is built based on spring, that is to say, Spring Framework is the basis of learning spring boot well. First of all, the premise of und ...

There are two ways to write in the import resource path A classpath, a classpath* So what's the difference between the two? 1.**classpath: * * only find files in your class path; 2. * * callsspath *: * * not only includes class path, but also includes jar file (class path) for searching, * * * classpath *: * * * is very important for multi ...

Environment: Centos7 + jdk1.8 + solr-7.7.2 + tomcat-8.5.43 Centos7 download address: https://www.jianshu.com/p/a63f47e096e8 jdk1.8 download address: https://www.oracle.com/java/technologies/javase-jdk8-downloads.html solr-7.7.2 download address: http://archive.apache.org/dist/lucene/solr/ tomcat-8.5.43 download address: http://archive.apache.or ...

Article directory 1, General way to get request parameters 2, Request forwarding 3, Shared data: 4, Get ServletContext 1, General way to get request parameters The following methods can be used to get the request parameters in both get and post request modes (1) String getParameter(String name): ...

1, ServletContext class (1) , what is a ServletConfig object ServletContext is an interface ServletContext is a domain object For a web project, Tomcat will only create a ServletContext object. (2) , what is a domain object **Domain object is an object that can be stored like a Map collection (d ...

1, Classloader type in JVM From the perspective of Java virtual machine, there are only two different classloaders: boot classloader and other classloaders. 1. Bootstrap classloader: This is implemented by c + +, which is mainly responsible for the core api under the JAVA_HOME/lib directory or the jar packaging specified by the - Xbootclasspath ...

Want to get the most complete and detailed information of the whole network: (1022848328)   JWT generates token with error: secret key byte array cannot be null or empty java.lang.IllegalArgumentException: secret key byte array cannot be null or empty. at io.jsonwebtoken.lang.Assert.notEmpty(Asse ...

Recently, I got a domain name. If I want to use it to directly access the project deployed on Tomcat, I have to add the project name at the beginning. After a short configuration, it succeeded. Visit once and arrive at the landing page. As a result, you can't log in. You have been logging in the inte ...