Private network

Permissioned network

Testnet(Sepolia)

Blockscout

IaC

1. 블록체인 노드 로그 관리

작업2. 데이터 파일 백업

Problems and Resolved

• 문제: Rejecting new connection from IP:PORT. Max 80 active connections limit reached.

  • 원인: Metamask, Remix, Nest.js
  • 해결: config 설정 변경
  • netstat -an | egrep "8545|…" | wc -l

  JsonRpcHttpService.java → connectionHandler() → activeConnectionsCount → AtomicInteger

  • kill PID → FIN_WAIT1: 서버 중지, 클라이언트 소켓 close.
  • TIME_WAIT
  • Stateless: HTTP, UDP, DNS

• invalid block warning log. (cause1, cause2)

  • snapshot
  • solution: --data-storage-format=FOREST
  • causes
    • 현재 Bonsai DB와 QBFT/IBFT2.0 이슈가 있음. 디스코드
    • Invalid block with IBFT2.0. 디스코드
    • Bonsai + Full sync 이슈가 있음. 디스코드
    • QBFT + shanghai when syncing a new node 이슈. https://github.com/hyperledger/besu/issues/6760
    • 내 디코: https://discord.com/channels/905194001349627914/1172617318845657199/1238395415003398186
    • https://discord.com/channels/905194001349627914/1172617318845657199/1202223382972600330
    • cause: 유효하지 않는 블록이 발견되어 블록 싱크 연결이 끊어지면서 블록 불러오기에 실패하는
  • Resolved: Use Forest DB and latest version(24.3.0)
  • Next Release: 다음 release때 반영 예정.

• P2P discovery OK but not creating a block

  • solution: 부트노드에 rpc-http-host=”0.0.0.0”를 추가. OR extraData에 노드 address가 올바른지 확인.
  • cause: https://victoryeo-62924.medium.com/deploy-hyperledger-besu-on-aws-c2f72666547d

• Config Error

  • https://discord.com/channels/905194001349627914/938504958909747250/1367011992342233129

• https://discord.com/channels/905194001349627914/938504958909747250/1367663389207167088

• 문제: 2025-12-01 00:12:46.006+00:00 | nioEventLoopGroup-3-6 | WARN | BftEventQueue | Queue size exceeded trying to add new bft event org.hyperledger.besu.consensus.common.bft.events.BftReceivedMessageEvent@365752c2

  • 원인: disk ?
  • 해결: increase disk → restart

Reference

프라이빗 네트워크 구성 docs