golang io wait error

Go language is a commonly used programming language. In I/O reading and writing, we often encounter various problems such as blocking, stuck, etc. These problems need to be solved patiently. This article will discuss the golang io wait error.

When writing programs in Go, the io and bufio packages are often used to read and write files. However, in actual operation, we will find some strange phenomena, such as program interruption, inability to read data, etc., resulting in abnormal file reading and writing. One of the most common problems is golang io wait error.

The general manifestation of golang io wait error is that when reading files, network connections, etc., it is stuck in the reading process and cannot continue to execute. This will cause the program to be blocked, unable to be unlocked, and unable to end the program.

There are many reasons for golang io wait errors, but they are mainly caused by improper code processing and writing. Let's analyze them one by one in order to better solve these problems.

1. The cache size setting is unreasonable

When using the bufio package to read and write files, there are some default settings, for example: the default value of the bufio.NewReaderSize function is 4KB. If you want to read large files, you can increase the cache appropriately to avoid program blocking due to excessive I/O operations.

However, we cannot set the cache too large. If it is set too large, the reading speed will slow down. It is generally recommended to use it on demand, and the cache size can be flexibly adjusted when needed.

2. Single goroutine infinite loop

Many times, when we use goroutine, we may encounter some stuck situations. The reason may be due to a program caused by a goroutine. Infinite loop. When a goroutine in the program is stuck, other goroutines cannot continue to execute, and the program will stall at the current line of code.

There are two main ways to solve this problem: one is to use the timeout mechanism to force the coroutine to end when the execution times out; the other is to add log records so that when the program is stuck, the stuck process can be viewed through the log location, then positioned and processed.

3. Improper use of locks during concurrent reading and writing

In concurrent reading and writing, you may encounter multiple goroutines reading and writing the same data at the same time. In this case, you need to Locks are used to ensure data consistency and thread safety.

But in the process of using locks, we need to pay attention to the choice of lock granularity. If the lock granularity is too coarse, it may not be able to effectively solve concurrency problems. If the lock granularity is too fine, it will lead to an increase in lock conflicts, resulting in Program performance degrades.

Another situation is the improper use of locks, such as forgetting to unlock, misuse of locks, etc. These errors may also cause the program to block.

In order to solve the problems caused by locks, we need to strengthen our understanding and application of the lock mechanism when using locks. Especially in the environment of concurrent processing and multi-threaded programs, we must use locks more carefully.

4. The code cannot release resources

In the code, there are some resources that developers need to release manually, such as file handles, network connections, etc. If you forget to release during traversal, the program will not end, or even cause serious problems such as memory leaks.

Therefore, when writing code, we need to follow good resource release habits and release the opened resources in a timely manner.

Summary

The above is a detailed introduction to golang io wait errors and their solutions. When we use the Go language to program, if we encounter a "waiting" problem, we first need to consider whether there is an infinite loop in the goroutine in the program, whether the correct lock is used, whether the cache size is reasonable, and whether there are any unreleased resources. etc. At the same time, we also need to use some tools, logs, etc. from time to time to help us discover, locate and solve problems.

In actual software development, avoiding program jams is very important and cannot be ignored. We need to continue to learn and summarize in order to better avoid various problems during IO reading and writing, and continuously improve the program. stability.

The above is the detailed content of golang io wait error. For more information, please follow other related articles on the PHP Chinese website!