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[PR #2063] [FixBug] Bedrock anthropic max iterations exceeded error #2236

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opened 2026-02-16 11:16:26 -05:00 by yindo · 0 comments
yindo commented 2026-02-16 11:16:26 -05:00
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📋 Pull Request Information

Original PR: https://github.com/langgenius/dify-official-plugins/pull/2063
Author: @noproblem520
Created: 11/14/2025
Status: 🔄 Open

Base: main ← Head: fix/Agent_Max_Round_Exceeded_Error

📝 Commits (1)

  • 4689d0e fully fix Agent Node Max Round Exceeded Issue

📊 Changes

2 files changed (+25 additions, -4 deletions)

View changed files

📝 models/bedrock/manifest.yaml (+1 -1)
📝 models/bedrock/models/llm/llm.py (+24 -3)

📄 Description

Related Issues or Context

I saw 2068 has been partially fixed this issue, we still need to tell LLM to summarize the information gathering from previous tool calls, otherwise it will still call __no_more_tools_available__.
image

Fix https://github.com/langgenius/dify/issues/27428
Fix https://github.com/langgenius/dify/issues/27215
Fix https://github.com/langgenius/dify/issues/17545

--- Old: 2068 has fixed partial problems based on this PR---

Issues
When we use bedrock anthropic models, there's a limitation「The toolConfig field must be defined when using toolUse and toolResult content blocks.」. function_calling.py will empty the tools that agents can use in the last round, this logic is fine but violates the limitation of bedrock anthropic models.

image image

Reproduce
We can easily reproduce the error by setting max_iterations to 2. If agent tries to think more than twice, the error occurred.

image

This PR contains Changes to Non-Plugin

  • Documentation
  • Other

This PR contains Changes to Non-LLM Models Plugin

  • I have Run Comprehensive Tests Relevant to My Changes

This PR contains Changes to LLM Models Plugin

  • My Changes Affect Message Flow Handling (System Messages and User→Assistant Turn-Taking)
  • My Changes Affect Tool Interaction Flow (Multi-Round Usage and Output Handling, for both Agent App and Agent Node)
  • My Changes Affect Multimodal Input Handling (Images, PDFs, Audio, Video, etc.)
  • My Changes Affect Multimodal Output Generation (Images, Audio, Video, etc.)
  • My Changes Affect Structured Output Format (JSON, XML, etc.)
  • My Changes Affect Token Consumption Metrics
  • My Changes Affect Other LLM Functionalities (Reasoning Process, Grounding, Prompt Caching, etc.)
  • Other Changes (Add New Models, Fix Model Parameters etc.)

Version Control (Any Changes to the Plugin Will Require Bumping the Version)

  • I have Bumped Up the Version in Manifest.yaml (Top-Level Version Field, Not in Meta Section)

Dify Plugin SDK Version

  • I have Ensured dify_plugin>=0.3.0,<0.6.0 is in requirements.txt (SDK docs)

Environment Verification (If Any Code Changes)

Local Deployment Environment

  • Dify Version is: , I have Tested My Changes on Local Deployment Dify with a Clean Environment That Matches the Production Configuration.

SaaS Environment

  • I have Tested My Changes on cloud.dify.ai with a Clean Environment That Matches the Production Configuration

🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.

## 📋 Pull Request Information **Original PR:** https://github.com/langgenius/dify-official-plugins/pull/2063 **Author:** [@noproblem520](https://github.com/noproblem520) **Created:** 11/14/2025 **Status:** 🔄 Open **Base:** `main` ← **Head:** `fix/Agent_Max_Round_Exceeded_Error` --- ### 📝 Commits (1) - [`4689d0e`](https://github.com/langgenius/dify-official-plugins/commit/4689d0ef3c831eacbabebd5dd40298936dc3b560) fully fix Agent Node Max Round Exceeded Issue ### 📊 Changes **2 files changed** (+25 additions, -4 deletions) <details> <summary>View changed files</summary> 📝 `models/bedrock/manifest.yaml` (+1 -1) 📝 `models/bedrock/models/llm/llm.py` (+24 -3) </details> ### 📄 Description ## Related Issues or Context <!-- ⚠️ NOTE: This repository is for Dify Official Plugins only. For community contributions, please submit to https://github.com/langgenius/dify-plugins instead. - Link Related Issues if Applicable: #issue_number - Or Provide Context about Why this Change is Needed --> I saw [2068](https://github.com/langgenius/dify-official-plugins/pull/2068) has been partially fixed this issue, we still need to tell LLM to summarize the information gathering from previous tool calls, otherwise it will still call ```__no_more_tools_available__```. <img width="1920" height="958" alt="image" src="https://github.com/user-attachments/assets/3ba2d8b3-541f-4123-8951-60633bfb493f" /> Fix https://github.com/langgenius/dify/issues/27428 Fix https://github.com/langgenius/dify/issues/27215 Fix https://github.com/langgenius/dify/issues/17545 --- Old: [2068](https://github.com/langgenius/dify-official-plugins/pull/2068) has fixed partial problems based on this PR--- **Issues** When we use bedrock anthropic models, there's a limitation「The toolConfig field must be defined when using toolUse and toolResult content blocks.」. ```function_calling.py``` will empty the tools that agents can use in the last round, this logic is fine but violates the limitation of bedrock anthropic models. <img width="705" height="472" alt="image" src="https://github.com/user-attachments/assets/51ea804c-c061-4897-ab05-6289ab41a64d" /> <img width="1606" height="783" alt="image" src="https://github.com/user-attachments/assets/0c0e9a8a-7255-4a17-a62e-2c93d4c08343" /> **Reproduce** We can easily reproduce the error by setting max_iterations to 2. If agent tries to think more than twice, the error occurred. <img width="1920" height="1078" alt="image" src="https://github.com/user-attachments/assets/b7ad28bf-0a91-4e33-bc3c-6a16c701c190" /> ## This PR contains Changes to *Non-Plugin* <!-- Put an `x` in all the boxes that apply by replacing [ ] with [x] For example: - [x] Documentation --> - [ ] Documentation - [x] Other ## This PR contains Changes to *Non-LLM Models Plugin* - [ ] I have Run Comprehensive Tests Relevant to My Changes <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> ## This PR contains Changes to *LLM Models Plugin* <!-- LLM Models Test Example: --> <!-- https://github.com/langgenius/dify-official-plugins/blob/main/.assets/test-examples/llm-plugin-tests/llm_test_example.md --> - [ ] My Changes Affect Message Flow Handling (System Messages and User→Assistant Turn-Taking) <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> - [x] My Changes Affect Tool Interaction Flow (Multi-Round Usage and Output Handling, for both Agent App and Agent Node) <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> - [ ] My Changes Affect Multimodal Input Handling (Images, PDFs, Audio, Video, etc.) <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> - [ ] My Changes Affect Multimodal Output Generation (Images, Audio, Video, etc.) <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> - [ ] My Changes Affect Structured Output Format (JSON, XML, etc.) <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> - [ ] My Changes Affect Token Consumption Metrics <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> - [ ] My Changes Affect Other LLM Functionalities (Reasoning Process, Grounding, Prompt Caching, etc.) <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> - [ ] Other Changes (Add New Models, Fix Model Parameters etc.) <!-- 📷 Include Screenshots/Videos Demonstrating the Fix, New Feature, or the Behavior Before/After Breaking Changes. --> ## Version Control (Any Changes to the Plugin Will Require Bumping the Version) - [x] I have Bumped Up the Version in Manifest.yaml (Top-Level `Version` Field, Not in Meta Section) <!-- ⚠️ NOTE: Version Format: MAJOR.MINOR.PATCH - MAJOR (0.x.x): Reserved for Significant architectural changes or incompatible API modifications - MINOR (x.0.x): For New feature additions while maintaining backward compatibility - PATCH (x.x.0): For Backward-compatible bug fixes and minor improvements - Note: Each Version Component (MAJOR, MINOR, PATCH) Can Be 2 Digits, e.g., 10.11.22 --> ## Dify Plugin SDK Version - [x] I have Ensured `dify_plugin>=0.3.0,<0.6.0` is in requirements.txt ([SDK docs](https://github.com/langgenius/dify-plugin-sdks/blob/main/python/README.md)) ## Environment Verification (If Any Code Changes) <!-- ⚠️ NOTE: At Least One Environment Must Be Tested. --> ### Local Deployment Environment - [x] Dify Version is: <!-- Specify Your Version (e.g., 1.2.0) -->, I have Tested My Changes on Local Deployment Dify with a Clean Environment That Matches the Production Configuration. <!-- - Python Virtual Env Matching Manifest.yaml & requirements.txt - No Breaking Changes in Dify That May Affect the Testing Result --> ### SaaS Environment - [ ] I have Tested My Changes on cloud.dify.ai with a Clean Environment That Matches the Production Configuration <!-- - Python Virtual Env Matching Manifest.yaml & requirements.txt --> --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
yindo added the pull-request label 2026-02-16 11:16:26 -05:00
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Reference: langgenius/dify-official-plugins#2236
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