claude-code - 💡(How to fix) Fix [Bug] Sub-agent task hangs without progress for extended duration [1 comments, 2 participants]

[{"error":"Error: LSP server plugin:rust-analyzer-lsp:rust-analyzer crashed with exit code 1\n at ChildProcess.<anonymous> (file:///Users/ekscrypto/.nvm/versions/node/v24.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2392:21524)\n at ChildProcess.emit (node:events:508:28)\n at ChildProcess._handle.onexit (node:internal/child_process:294:12)","timestamp":"2026-04-10T11:35:04.862Z"},{"error":"MaxFileReadTokenExceededError: File content (35608 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.\n at Fy7 (file:///Users/ekscrypto/.nvm/versions/node/v24.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1347:7513)\n at process.processTicksAndRejections (node:internal/process/task_queues:103:5)\n at async Qy7 (file:///Users/ekscrypto/.nvm/versions/node/v24.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1351:2435)\n at async Object.call (file:///Users/ekscrypto/.nvm/versions/node/v24.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1356:5845)\n at async file:///Users/ekscrypto/.nvm/versions/node/v24.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:5855:1955","timestamp":"2026-04-10T13:14:33.876Z"}]

TL;DR

The issue may be resolved by adjusting the file reading parameters to handle large files, specifically using offset and limit parameters or the GrepTool.

Guidance

• Investigate the MaxFileReadTokenExceededError and consider implementing pagination or partial file reading to avoid exceeding the maximum allowed tokens.
• Review the error message indicating the rust-analyzer-lsp crashed with exit code 1, and check if there are any known issues or updates for the rust-analyzer-lsp plugin.
• Verify if the issue persists after restarting the sub-agent task or the entire system.
• Check the documentation for the @anthropic-ai/claude-code/cli.js module to see if there are any configuration options or workarounds for handling large files.

Example

No specific code example can be provided without more context, but adjusting the file reading parameters might involve modifying function calls to include offset and limit parameters, such as readFile(offset, limit).

Notes

The provided information suggests that the issue might be related to handling large files, but without more context or details about the code and system configuration, it's difficult to provide a more specific solution.

Recommendation

Apply workaround: Adjusting the file reading parameters or using the GrepTool might help mitigate the issue, especially for handling large files.