claude-code - 💡(How to fix) Fix [Bug] Claude Code CLI responses extremely slow (2+ minutes latency) [1 comments, 2 participants]

[{"error":"RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded\n at Socket.onChildStdout (node:child_process:484:14)\n at Socket.emit (node:events:518:28)\n at addChunk (node:internal/streams/readable:561:12)\n at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)\n at Readable.push (node:internal/streams/readable:392:5)\n at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)","timestamp":"2026-04-08T14:06:58.583Z"},{"error":"Error: 1P event logging: 2 events failed to export (code=ECONNRESET, Client network socket disconnected before secure TLS connection was established)\n at fh1.queueFailedEvents (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:496:2546)\n at async fh1.doExport (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:496:1465)","timestamp":"2026-04-08T14:09:26.679Z"},{"error":"Error: {"stack":"Error: Failed to export 2 events (code=ECONNRESET, Client network socket disconnected before secure TLS connection was established)\n at fh1.doExport (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:496:1640)","message":"Failed to export 2 events (code=ECONNRESET, Client network socket disconnected before secure TLS connection was established)","name":"Error"}\n at zn1.error (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2085:4342)\n at EE1.error (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:491:10505)\n at file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:491:36851\n at w9_ (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:491:37397)\n at file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:492:24943","timestamp":"2026-04-08T14:09:26.680Z"},{"error":"RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded\n at Socket.onChildStdout (node:child_process:484:14)\n at Socket.emit (node:events:518:28)\n at addChunk (node:internal/streams/readable:561:12)\n at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)\n at Readable.push (node:internal/streams/readable:392:5)\n at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)\n at Pipe.callbackTrampoline (node:internal/async_hooks:130:17)","timestamp":"2026-04-08T14:23:53.492Z"},{"error":"RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded\n at Socket.onChildStdout (node:child_process:484:14)\n at Socket.emit (node:events:518:28)\n at addChunk (node:internal/streams/readable:561:12)\n at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)\n at Readable.push (node:internal/streams/readable:392:5)\n at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)\n at Pipe.callbackTrampoline (node:internal/async_hooks:130:17)","timestamp":"2026-04-08T14:24:25.845Z"},{"error":"Error: 1P event logging: 4 events failed to export (code=ECONNRESET, Client network socket disconnected before secure TLS connection was established)\n at fh1.queueFailedEvents (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:496:2546)\n at async fh1.doExport (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:496:1465)","timestamp":"2026-04-08T14:24:38.977Z"},{"error":"Error: {"stack":"Error: Failed to export 4 events (code=ECONNRESET, Client network socket disconnected before secure TLS connection was established)\n at fh1.doExport (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:496:1640)","message":"Failed to export 4 events (code=ECONNRESET, Client network socket disconnected before secure TLS connection was established)","name":"Error"}\n at zn1.error (file:///C:/Users/ADMIN/AppData/Roaming/npm/node_modules/…

TL;DR

The issue with Claude Code's slow response time may be related to the ERR_CHILD_PROCESS_STDIO_MAXBUFFER error and network socket disconnections, suggesting a potential fix or workaround involving buffer size adjustments or network configuration tweaks.

Guidance

• Investigate the ERR_CHILD_PROCESS_STDIO_MAXBUFFER error and consider increasing the maxBuffer size to prevent stdout maxBuffer length exceeded errors.
• Verify network connectivity and stability, as the ECONNRESET error indicates client network socket disconnections before secure TLS connections are established.
• Check the Clash Verge proxy configuration to ensure it is not causing any issues with the connection to api.anthropic.com.
• Test Claude Code with a different network setup or without the proxy to isolate the issue.

Example

No specific code snippet can be provided without more context, but adjusting the maxBuffer size might look something like this:

const { exec } = require('child_process');

const child = exec('command', { maxBuffer: 1024 * 500 }); // increase maxBuffer size

Note that this is a hypothetical example and may not directly apply to the Claude Code issue.

Notes

The provided error logs suggest issues with child process stdout buffering and network socket disconnections. However, without more information about the Claude Code implementation and configuration, it is difficult to provide a more specific solution. The truncated content may also be hiding important details.

Recommendation

Apply a workaround by adjusting the maxBuffer size or network configuration to mitigate the ERR_CHILD_PROCESS_STDIO_MAXBUFFER error and ECONNRESET errors, as the root cause of the issue is unclear and may require further investigation.