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claude-code - 💡(How to fix) Fix [Bug] Claude Code generates hallucinated or nonsensical responses [1 comments, 2 participants]

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anthropics/claude-code#46455•Fetched 2026-04-11 06:19:51
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Error Message

[{"error":"RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded\n at Socket.onChildStdout (node:child_process:482:14)\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":"2026-04-10T19:39:29.911Z"},{"error":"Error: Request was aborted.\n at Hv8 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1485:16693)\n at Hv8.next (<anonymous>)\n at MmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:8941)\n at MmK.next (<anonymous>)\n at WmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7697:10715)\n at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n at async file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7914\n at async Le1 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4397:2408)\n at async Object.jL6 [as callModel] (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7884)\n at async C1z (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4105:11220)","timestamp":"2026-04-10T20:55:48.497Z"},{"error":"Error: Request was aborted.\n at Hv8 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1485:16693)\n at Hv8.next (<anonymous>)\n at MmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:8941)\n at MmK.next (<anonymous>)\n at WmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7697:10715)\n at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n at async file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7914\n at async Le1 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4397:2408)\n at async Object.jL6 [as callModel] (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7884)\n at async C1z (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4105:11220)","timestamp":"2026-04-10T20:56:17.128Z"},{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: <!DOCTYPE html>\n<!--[if lt IE 7]> <html class=\"no-js ie6 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if IE 7]> <html class=\"no-js ie7 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if IE 8]> <html class=\"no-js ie8 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->\n<head>\n\n\n<title>mcp-proxy.anthropic.com | 502: Bad gateway</title>\n<meta charset="UTF-8" />\n<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />\n<meta http-equiv="X-UA-Compatible" content="IE=Edge" />\n<meta name="robots" content="noindex, nofollow" />\n<meta name="viewport" content="width=device-width,initial-scale=1" />\n<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/main.css" />\n\n\n</head>\n<body>\n<div id="cf-wrapper">\n <div id="cf-error-details" class="p-0">\n <header class="mx-auto pt-10 lg:pt-6 lg:px-8 w-240 lg:w-full mb-8">\n <h1 class="inline-block sm:block sm:mb-2 font-light text-60 lg:text-4xl text-black-dark leading-tight mr-2">\n <span class="inline-block">Bad gateway</span>\n <span class="code-label">Error code 502</span>\n </h1>\n <div>\n Visit <a href="https://www.cloudflare.com/5xx-error-landing?utm_source=errorcode_502&utm_campaign=mcp-proxy.anthropic.com" target="_blank" rel="noopener noreferrer">cloudflare.com</a> for more information.\n </div>\n <div class="mt-3">2026-04-10 23:07:04 UTC</div>\n </header>\n <div class="my-8 bg-gradient-gray">\n <div class="w-240 lg:w-full mx-auto">\n <div c…

Code Example

[{"error":"RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded\n    at Socket.onChildStdout (node:child_process:482:14)\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":"2026-04-10T19:39:29.911Z"},{"error":"Error: Request was aborted.\n    at Hv8 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1485:16693)\n    at Hv8.next (<anonymous>)\n    at MmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:8941)\n    at MmK.next (<anonymous>)\n    at WmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7697:10715)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7914\n    at async Le1 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4397:2408)\n    at async Object.jL6 [as callModel] (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7884)\n    at async C1z (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4105:11220)","timestamp":"2026-04-10T20:55:48.497Z"},{"error":"Error: Request was aborted.\n    at Hv8 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1485:16693)\n    at Hv8.next (<anonymous>)\n    at MmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:8941)\n    at MmK.next (<anonymous>)\n    at WmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7697:10715)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7914\n    at async Le1 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4397:2408)\n    at async Object.jL6 [as callModel] (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7884)\n    at async C1z (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4105:11220)","timestamp":"2026-04-10T20:56:17.128Z"},{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: <!DOCTYPE html>\n<!--[if lt IE 7]> <html class=\"no-js ie6 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if IE 7]>    <html class=\"no-js ie7 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if IE 8]>    <html class=\"no-js ie8 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if gt IE 8]><!--> <html class=\"no-js\" lang=\"en-US\"> <!--<![endif]-->\n<head>\n\n\n<title>mcp-proxy.anthropic.com | 502: Bad gateway</title>\n<meta charset=\"UTF-8\" />\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n<meta http-equiv=\"X-UA-Compatible\" content=\"IE=Edge\" />\n<meta name=\"robots\" content=\"noindex, nofollow\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1\" />\n<link rel=\"stylesheet\" id=\"cf_styles-css\" href=\"/cdn-cgi/styles/main.css\" />\n\n\n</head>\n<body>\n<div id=\"cf-wrapper\">\n    <div id=\"cf-error-details\" class=\"p-0\">\n        <header class=\"mx-auto pt-10 lg:pt-6 lg:px-8 w-240 lg:w-full mb-8\">\n            <h1 class=\"inline-block sm:block sm:mb-2 font-light text-60 lg:text-4xl text-black-dark leading-tight mr-2\">\n              <span class=\"inline-block\">Bad gateway</span>\n              <span class=\"code-label\">Error code 502</span>\n            </h1>\n            <div>\n               Visit <a href=\"https://www.cloudflare.com/5xx-error-landing?utm_source=errorcode_502&utm_campaign=mcp-proxy.anthropic.com\" target=\"_blank\" rel=\"noopener noreferrer\">cloudflare.com</a> for more information.\n            </div>\n            <div class=\"mt-3\">2026-04-10 23:07:04 UTC</div>\n        </header>\n        <div class=\"my-8 bg-gradient-gray\">\n            <div class=\"w-240 lg:w-full mx-auto\">\n                <div c…
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Bug Description stupid claude chat responses and hallucinations

Environment Info

  • Platform: darwin
  • Terminal: Apple_Terminal
  • Version: 2.1.87
  • Feedback ID: f92938a2-31d5-4c59-b925-3644b690a149

Errors

[{"error":"RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded\n    at Socket.onChildStdout (node:child_process:482:14)\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":"2026-04-10T19:39:29.911Z"},{"error":"Error: Request was aborted.\n    at Hv8 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1485:16693)\n    at Hv8.next (<anonymous>)\n    at MmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:8941)\n    at MmK.next (<anonymous>)\n    at WmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7697:10715)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7914\n    at async Le1 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4397:2408)\n    at async Object.jL6 [as callModel] (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7884)\n    at async C1z (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4105:11220)","timestamp":"2026-04-10T20:55:48.497Z"},{"error":"Error: Request was aborted.\n    at Hv8 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1485:16693)\n    at Hv8.next (<anonymous>)\n    at MmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:8941)\n    at MmK.next (<anonymous>)\n    at WmK (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7697:10715)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7914\n    at async Le1 (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4397:2408)\n    at async Object.jL6 [as callModel] (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:7692:7884)\n    at async C1z (file:///Users/marcosanderson/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:4105:11220)","timestamp":"2026-04-10T20:56:17.128Z"},{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: <!DOCTYPE html>\n<!--[if lt IE 7]> <html class=\"no-js ie6 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if IE 7]>    <html class=\"no-js ie7 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if IE 8]>    <html class=\"no-js ie8 oldie\" lang=\"en-US\"> <![endif]-->\n<!--[if gt IE 8]><!--> <html class=\"no-js\" lang=\"en-US\"> <!--<![endif]-->\n<head>\n\n\n<title>mcp-proxy.anthropic.com | 502: Bad gateway</title>\n<meta charset=\"UTF-8\" />\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n<meta http-equiv=\"X-UA-Compatible\" content=\"IE=Edge\" />\n<meta name=\"robots\" content=\"noindex, nofollow\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1\" />\n<link rel=\"stylesheet\" id=\"cf_styles-css\" href=\"/cdn-cgi/styles/main.css\" />\n\n\n</head>\n<body>\n<div id=\"cf-wrapper\">\n    <div id=\"cf-error-details\" class=\"p-0\">\n        <header class=\"mx-auto pt-10 lg:pt-6 lg:px-8 w-240 lg:w-full mb-8\">\n            <h1 class=\"inline-block sm:block sm:mb-2 font-light text-60 lg:text-4xl text-black-dark leading-tight mr-2\">\n              <span class=\"inline-block\">Bad gateway</span>\n              <span class=\"code-label\">Error code 502</span>\n            </h1>\n            <div>\n               Visit <a href=\"https://www.cloudflare.com/5xx-error-landing?utm_source=errorcode_502&utm_campaign=mcp-proxy.anthropic.com\" target=\"_blank\" rel=\"noopener noreferrer\">cloudflare.com</a> for more information.\n            </div>\n            <div class=\"mt-3\">2026-04-10 23:07:04 UTC</div>\n        </header>\n        <div class=\"my-8 bg-gradient-gray\">\n            <div class=\"w-240 lg:w-full mx-auto\">\n                <div c…

Note: Content was truncated.

extent analysis

TL;DR

The issue can be mitigated by checking the API endpoint and handling the "Bad gateway" error response.

Guidance

  • Check the API endpoint mcp-proxy.anthropic.com for any issues or maintenance, as the error response indicates a "Bad gateway" error.
  • Verify the request being sent to the endpoint to ensure it is correctly formatted and valid.
  • Handle the "Bad gateway" error response in the code to prevent the application from crashing, potentially by implementing retry logic or error handling mechanisms.
  • Review the Cloudflare documentation for more information on the 502 error code and potential solutions.

Example

No code example is provided due to the lack of specific code context in the issue.

Notes

The issue seems to be related to a network or API endpoint issue, rather than a code-specific problem. The "Bad gateway" error response suggests that the issue is outside of the application's control. The provided error messages and stack traces do not point to a specific code issue.

Recommendation

Apply a workaround to handle the "Bad gateway" error response, such as implementing retry logic or error handling mechanisms, to prevent the application from crashing. This will allow the application to continue functioning while the underlying issue is investigated and resolved.

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#environment setup#docker error#permission error#memory optimization#batch processing

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