Ethereum: Geth – A Common Issue with Number of Finalized Blocks Missing
As a long-time Ethereum developer and user, I recently experienced an unexpected power outage that left me scrambling to launch my Geth + Prysm clients. What was supposed to be a seamless process quickly turned into a frustrating experience as I realized that the number of finalized blocks on the blockchain had skipped a day.
This issue is not unique to this specific situation; it’s a common problem faced by many Ethereum users, including developers and users who rely on Geth or other decentralized applications (dApps) built on the Ethereum network. In this article, we’ll delve into the reasons behind this issue and explore potential solutions to prevent similar problems in the future.
Understanding the Basics
Before diving into the details of the problem, it’s essential to understand some basic concepts related to Ethereum and its blockchain:
- Block
: A block is a collection of transactions, known as blocks, that are added to the blockchain.
- Finalized Block Number (FBN): The FBN represents the most recent block number on the Ethereum network.
- Prysm: Prysm is an Ethereum-based cryptocurrency that uses a proof-of-stake consensus mechanism.
The Issue with Geth and Prysm Clients
When using Geth or Prysm clients to access the Ethereum blockchain, you need to be aware of the following:
- The client’s local FBN is not always synchronized with the global FBN.
- If a block is not successfully included in a block chain, it may skip a day and appear as if it has been lost.
The Cause of the Issue
There are several reasons why this issue might be occurring:
- Network congestion: High network congestion can cause blocks to be delayed or skipped.
- Server issues: Server problems or maintenance can impact block inclusion and synchronization.
- Local configuration: Incorrect local configurations, such as outdated blockchain data, can lead to discrepancies between the client’s FBN and the global FBN.
Solutions and Workarounds
While there are no guaranteed solutions to prevent the issue from occurring, here are some workarounds you can try:
- Sync your clients: Ensure that both Geth and Prysm clients are running with their local FBNs set to match the global FBN.
- Adjust your client’s configuration

: Check if your client has any settings that might be causing the issue, such as a custom block chain or a modified local blockchain data file.
- Contact support: Reach out to Geth and Prysm teams for assistance with resolving the issue.
While this problem is not unique to Ethereum, it highlights the importance of understanding the underlying mechanics of the network and being prepared to troubleshoot issues that may arise.
By understanding the causes behind this issue and implementing workarounds or seeking support, you can minimize the impact of the problem on your daily activities.