go resource_error ai_generated true

fatal error: runtime: out of memory

ID: go/goroutine-not-scheduled

Also available as: JSON · Markdown · 中文
80%Fix Rate
87%Confidence
0Evidence
2024-06-11First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.21 active — — —

Root Cause

Creating an excessive number of goroutines without limit, exhausting system memory.

generic

中文

无限创建 goroutine，导致系统内存耗尽。

Workarounds

  1. 95% success 
    Use a worker pool pattern: 

const maxWorkers = 10
jobs := make(chan int)
var wg sync.WaitGroup
for i := 0; i < maxWorkers; i++ {
    wg.Add(1)
    go func() {
        defer wg.Done()
        for j := range jobs {
            process(j)
        }
    }()
}
// send jobs and close
  2. 90% success 
    Use semaphore channel to limit goroutine count: 

sem := make(chan struct{}, 10)
for _, task := range tasks {
    sem <- struct{}{}
    go func(t task) {
        defer func() { <-sem }()
        process(t)
    }(task)
}

Dead Ends

Common approaches that don't work:

  1. 90% fail

    Temporary fix; doesn't solve the underlying goroutine leak.

  2. 70% fail

    WaitGroup doesn't limit concurrency; it only waits for all to finish.