Tag: exists

Meituan Ermian: How to check whether a username exists among 1 billion users?

Coder Technology Column 2023-11-01 08:50 Published in Zhejiang The following article comes from JAVA Xuyang, author JAVA Xuyang JAVA Xuyang. Rising Sun, I hope I can be like the rising sun, full of hope for everything~~ Java Backend Interviewer Selected Java backend full-stack interview questions, personal website: java-family.cn, database, message queue, architecture… everything you want […]

Kafka – java.lang.VerifyError: Uninitialized object exists on backward branch 193

Article directory question Troubleshooting ideas Question [root@localhost bin]# ./kafka-server-start.sh ../config/server.properties [2023-10-25 14:37:59,386] INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$) [2023-10-25 14:37:59,697] ERROR Exiting Kafka due to fatal exception (kafka.Kafka$) java.lang.VerifyError: Uninitialized object exists on backward branch 193 Exception Details: Location: scala/collection/immutable/HashMap$HashTrieMap.split()Lscala/collection/immutable/Seq; @238: goto Reason: Error exists in the bytecode Bytecode: 0000000: 2ab6 0044 04a0 000f bb00 da59 […]

MSQL Series (7) Mysql Practice – The Difference Between SQL Statements Join, exists, and in

Mysql practice-the difference between SQL statements Join, exists, and in Earlier we explained the storage structure of the index, the index structure of B + Tree, the leftmost matching principle of the index, and the optimization suggestions for commonly used SQL statements. Today we will explain in detail the three joins, exist, and in that […]

Oracle-expdp reports error ORA-08103: object no longer exists

Question: The user’s expdp backup task occasionally reports errors during execution. The error is ORA-08103: object no longer exists. Processing object type SCHEMA_EXPORT/PACKAGE/PACKAGE_BODY Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/REF_CONSTRAINT ORA-39126: Worker unexpected fatal error in KUPW$WORKER.FETCH_XML_OBJECTS [REF_CONSTRAINT:”OWNER”.”FK_TABLENAME”] ORA-08103: object no longer exists ORA-06512: at “SYS.DBMS_SYS_ERROR”, line 95 ORA-06512: at “SYS.KUPW$WORKER”, line 9715 —– PL/SQL Call Stack —– […]

Solve gyp verb ensuring that file exists: C:\Python27\python.exe gyp ERR! configure error gyp ERR! sta

Table of Contents Solve “gyp verb ensuring that file exists: C:\Python27\python.exe gyp ERR! configure error gyp ERR! sta” error Problem background solution 1. Make sure the Python executable file exists 2. Add Python to environment variables 3. Reinstall the Node.js module 4. Upgrade or downgrade Node.js in conclusion Sample code What is gyp? Features of […]

Details: How to install and configure Hive on Linux system and the problems I encountered… Table CTLGS already exists (state=42S01,code=1050)

Table of Contents 1. What does hive do? 2. Conditions for installing hive 3. Install hive (1) hive installation and environment variable configuration 1. Upload the software package 2. Unzip the software package (unzip to the corresponding file directory) 3. Configure environment variables (for convenience of operation later) 4. Avoid jar package conflicts 5. Delete […]

The zookeeper registration center node still exists after the dubbo provider stops the service

The dubbo service is stopped, but there is still the node on zk. In this case, the client will fail to call when consuming. There are many reasons for this problem. Let me start with my solution, which is to upgrade the dubbo version from 2.7.1 to 2.7.3. Ok, after talking about the solution, let’s […]

thinkphp: Determine whether the data exists, and then use it as a judgment condition for the database (add additional query conditions to the database query)

Method 1: Use thinkphp syntax to write public function select_endProduceinfo(){ $like_info = input(‘post.like_info’, ”); $page = input(‘post.page’, 1); $pageSize = input(‘post.pageSize’, 10); $start = ($page – 1) * $pageSize; $username = input(‘post.username’,”); $search_line1 = input(‘post.search_line1’,”); $search_line2 = input(‘post.search_line2’,”); $search_line3 = input(‘post.search_line3’,”); $search_line4 = input(‘post.search_line4’,”); $employee_num = db::table(‘fa_account_info’)->where([‘username’ => $username])->value(’employee_num’); //All data information $data[‘info’] = db::table(‘wip_transactions’) […]