go io_error ai_generated true

error: io: read/write on closed pipe (buffer too small for atomic write)

ID: go/io-copy-buffer-too-small

Also available as: JSON · Markdown · 中文
80%Fix Rate
81%Confidence
0Evidence
2024-04-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.20 active — — —
1.21 active — — —

Root Cause

Using io.Copy with a buffer that is too small for atomic operations, causing partial writes and pipe closure.

generic

中文

使用io.Copy时缓冲区太小，无法进行原子操作，导致部分写入和管道关闭。

Workarounds

  1. 90% success Use io.Copy with default buffer or specify larger buffer 
    buf := make([]byte, 32*1024) // 32KB buffer
_, err := io.CopyBuffer(dst, src, buf)
if err != nil { /* handle */ }

Dead Ends

Common approaches that don't work:

  1. Increasing buffer size arbitrarily 50% fail

    May not fix underlying issue; use io.CopyBuffer with larger buffer.