1. Abnormal Exception: When an error is detected, the Python interpreter cannot continue to execute. Instead, some error prompts appear. This is the so-called “exception”, which is what we often call BUG. 1.1 Catching Exceptions Basic syntax: try: error code may occur except: Code to be executed if an exception occurs Code example: # Try […]
Tag: exception
redis org.springframework.data.redis.RedisSystemException: Error in execution
Background When running a certain system, the test class stores a certain value into redis and then takes it out. 1. Problems encountered Error reported: org.springframework.data.redis.RedisSystemException: Error in execution; nested exception is io.lettuce.core.RedisCommandExecutionException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify […]
Springboot2.x integrated lettuce connection redis cluster reports timeout exception Command timed out after 6 second(s)
Original/Zhu Jiqian Background: Recently, I was doing a stress test on a newly developed Springboot system. I found that when I first started the stress test, I could access data from the redis cluster normally. However, after a few minutes of pause, and then when I continued to use jmeter to perform the stress test, […]
SpringBoot application starts org.apache.catalina.LifecycleException
Table of Contents SpringBoot application starts org.apache.catalina.LifecycleException Problem Description Cause Analysis Solution 1. Check the resources that the application depends on 2. Check application configuration 3. Check port occupancy 4. Check dependent component version compatibility 5. Check the log files Application scenario example: org.apache.catalina.LifecycleExceptionexception caused by database connection exception SpringBoot application starts org.apache.catalina.LifecycleException When developing […]
org.hibernate.QueryException: could not instantiate class [com.ak47.cms.cms.dto.TechArticleDto] from
Table of Contents org.hibernate.QueryException: could not instantiate class [com.ak47.cms.cms.dto.TechArticleDto] from tuple Abnormal background solution in conclusion org.hibernate.QueryException: could not instantiate class [com.ak47.cms.cms.dto.TechArticleDto] from tuple When performing Hibernate-based data query, you may encounter an exception similar to ??org.hibernate.QueryException: could not instantiate class??, especially when using DTO (Data Transfer Object) from When mapping data in query results. […]
Solve javax.persistence.RollbackException: Transaction marked as rollbackOnly Ask
Table of Contents Solve javax.persistence.RollbackException: Transaction marked as rollbackOnly Ask Abnormal 1. Apply logic 2. Persistence context issues 3. Restraint violations Approach 1. Check application logic 2. Review persistence context management 3. Check for constraint violations 4. Exception handling and logging 5. Reference documentation and community support in conclusion Resolving javax.persistence.RollbackException: Transaction marked as rollbackOnly […]
The saveBatch of mybatis-plus reports an error, but there is no problem with save? Null pointer Caused by: java.lang.NullPointerException
Null pointer problem in batch operations such as saveBatch in mybatis-plus describe: Error message Solutions solution doubt Reference blog Description: It’s almost time to get off work again, haha. I hope I can help you. I’ll explain it in a scribble. Null pointers will appear in batch operations, but there is no problem in a […]
Python Exception Handling: Exploration and Best Practices of Three Different Approaches
PythonException handling: exploration and best practices of three different methods Foreword This article aims to explore three different exception handling methods in Python. By having a deep understanding of various exception handling strategies, we can better deal with different programming scenarios and choose the method that best suits our needs. Exception handling plays a vital […]
defer and exception handling
Article directory `defer` and exception handling Why use `defer` How to use `defer` Notes on using `defer` Precomputed parameters What are exceptions and errors How to handle exceptions and errors Considerations for handling exceptions and errors defer and exception handling In this article, we introduce the use and precautions of defer in Go language, and […]
Mybatis creation return object exception caused by Lombok’s @Builder annotation
Mybatis creation return object exception caused by Lombok’s @Builder annotation **Conclusion:** After using the Bbuilder annotation, a fully parameterized constructor will be produced based on the current class (excluding the attributes of the parent class). Mybaitis will cause many strange exceptions when it attributes the returned data, so it is best not to use it. […]