chore: retry followers gathering

[renancloudwalk]

No description provided.

[github-actions]

PR Review 🔍

⏱️ Estimated effort to review [1-5]	3, because the PR involves changes to the consensus mechanism in a distributed system, which is inherently complex. The introduction of a retry mechanism for network connections requires careful consideration of edge cases and potential failure modes.
🧪 Relevant tests	No
⚡ Possible issues	Possible Bug: The retry_connect function does not handle the case where RETRY_ATTEMPTS is set to zero, which could lead to an infinite loop or immediate failure without any retry attempts.
	Performance Concern: The use of sleep(RETRY_DELAY) within the retry loop could introduce significant delays in the consensus process, especially if RETRY_ATTEMPTS is set to a high number and the delay is substantial.
🔒 Security concerns	No

Code feedback:

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relevant file	src/eth/consensus.rs
suggestion	Consider implementing exponential backoff for the retry mechanism instead of a fixed delay. This can help in handling high loads or network issues more gracefully by gradually increasing the wait time between retries, thus reducing the load on the network and potentially increasing the chance of a successful connection. [important]
relevant line	sleep(RETRY_DELAY).await;

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relevant file	src/eth/consensus.rs
suggestion	It's important to ensure that RETRY_ATTEMPTS is greater than zero to avoid potential infinite loops or immediate failures. Adding a check at the start of the retry_connect function to return an error if RETRY_ATTEMPTS is zero can prevent such issues. [important]
relevant line	for attempt in 1..=RETRY_ATTEMPTS {

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relevant file	src/eth/consensus.rs
suggestion	To improve the robustness of the retry mechanism, consider adding a maximum timeout for the total retry duration. This can prevent the system from hanging indefinitely in scenarios where the connection cannot be established despite multiple retries. [medium]
relevant line	sleep(RETRY_DELAY).await;

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relevant file	src/eth/consensus.rs
suggestion	To enhance error handling, consider logging the number of successful connections versus failed attempts after the retry loop completes. This could provide valuable insights during debugging and monitoring of the system's connectivity. [medium]
relevant line	Err(e) => {

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[github-actions]

PR Code Suggestions ✨

Category	Suggestion	Score
Performance	Use a reference instead of cloning the string in each iteration Avoid cloning the address string in each loop iteration by using a reference instead. src/eth/consensus.rs [215-220] -match AppendEntryServiceClient::connect(address.clone()).await { +match AppendEntryServiceClient::connect(&address).await { Ok(client) => return Ok(client), Err(e) => { tracing::warn!("Failed to connect to {}: attempt {} of {}: {:?}", address, attempt, RETRY_ATTEMPTS, e); sleep(RETRY_DELAY).await; } } Suggestion importance[1-10]: 9 Why: Using a reference instead of cloning the string in each iteration improves performance by reducing unnecessary allocations, making the code more efficient.	9
	Implement exponential backoff for retry delays Consider using exponential backoff for the retry delay to handle high load or transient issues more effectively. src/eth/consensus.rs [219] -sleep(RETRY_DELAY).await; +let backoff_time = RETRY_DELAY * attempt.pow(2); +sleep(backoff_time).await; Suggestion importance[1-10]: 7 Why: Implementing exponential backoff can improve the retry mechanism's effectiveness under high load or transient issues, but it is a performance enhancement rather than a critical fix.	7
Error handling	Handle errors from the sleep function to ensure robustness Handle potential errors from the sleep function to ensure the retry mechanism is robust. src/eth/consensus.rs [219] -sleep(RETRY_DELAY).await; +if let Err(e) = sleep(RETRY_DELAY).await { + tracing::error!("Error during sleep between retries: {:?}", e); + return Err(anyhow!("Error during sleep between retries: {:?}", e)); +} Suggestion importance[1-10]: 8 Why: Handling potential errors from the sleep function improves the robustness of the retry mechanism, ensuring that any issues during sleep are properly logged and handled.	8

[renancloudwalk]

we will try another strategy, instead of gathering followers at startup, lets keep gathering them as the leader