# Besu RPC Minor Warnings - Fixed

**Date**: 2026-01-04  
**Status**: ✅ **WARNINGS ADDRESSED**

---

## Summary

Addressed minor operational warnings on VMID 2501, 2506, and 2508 by:
- Restarting services to clear transient errors
- Optimizing JVM garbage collection settings
- Verifying RPC functionality

---

## Issues Identified

### VMID 2501
- **Warning**: Thread blocked for 2531ms (exceeded 2000ms limit)
- **Cause**: Transient database operations or resource contention
- **Status**: ✅ Resolved after restart

### VMID 2506
- **Warning**: Thread blocked (historical)
- **Status**: ✅ No recent errors

### VMID 2508
- **Warning**: Thread blocked + Invalid block import errors
- **Cause**: Transient sync issues and resource contention
- **Status**: ✅ Resolved after restart

---

## Fixes Applied

### 1. Service Restarts
- Restarted all three affected nodes to clear transient errors
- Services recovered successfully

### 2. JVM Optimization
- Reduced `MaxGCPauseMillis` from 200ms to 100ms for faster garbage collection
- Added `ParallelGCThreads=4` for optimized parallel garbage collection
- This helps reduce thread blocking by allowing GC to complete faster

### 3. Verification
- All nodes verified to be responding correctly to RPC requests
- Chain ID 138 confirmed
- Block numbers accessible

---

## Current Status

✅ **All nodes operational**
- VMID 2501: ✅ No runtime errors, RPC working (Chain 138)
- VMID 2506: ✅ No runtime errors, RPC working (Chain 138)
- VMID 2508: ✅ No runtime errors, RPC working (Chain 138)

**Note**: The "exit-code" messages seen in logs are normal systemd notifications from service restarts, not actual runtime errors.

---

## Notes

- Thread blocking warnings are typically transient and occur during:
  - Database compaction operations
  - Large block imports
  - Garbage collection cycles
  
- Invalid block import errors are normal during network synchronization and resolve automatically

- All warnings were non-critical and did not affect RPC functionality

---

**Last Updated**: 2026-01-04
