RPC Node Crashes After Failed Snapshot Bank Verification on Mainnet

A Solana developer has reported a recent issue that frequently crashes the RPC (Remote Procedure Call) node. The error message indicates that the Solana runtime attempted to rebuild socket bank 300607256, but failed to verify the snapshot bank.

Issue:

The panic message from the Solana runtime indicates that it attempted to rebuild socket bank 300607256, which is an important step in setting up a new RPC node. However, during this process, the snapshot bank verification failed, resulting in a crash.

Cause:

To better understand the cause of this issue, we need to take a closer look at the behavior of the Solana runtime. The message indicates that the runtime attempted to rebuild socket bank 300607256 using the “rebuild_bank” function. This function is responsible for verifying the snapshot bank and rebuilding it if necessary.

However, the message also mentions that the runtime failed to verify the snapshot bank, which means that there is a problem with the data or configuration used by the Solana runtime.

Solution:

To fix this issue, we need to investigate why the snapshot bank validation failed. There are several possible causes for this issue, including:

• Incorrect data or configuration: The data and configuration used by the Solana runtime may be incorrect or outdated.

• Incompatible wallet or key pair: The wallet or key pair used to sign the transaction may be incompatible with the Solana runtime.

• Invalid or corrupted blockchain state

  

  : The blockchain state may be incorrect or corrupted, which is why the snapshot bank cannot be verified.

To fix this issue, we can try the following steps:

• Check the data and configuration used by the Solana runtime to verify the snapshot bank.

• Verify that the wallet or key pair used to sign the transaction is compatible with the Solana runtime.

• Try using a different blockchain network or wallet to see if the issue persists.

Conclusion:

Failed to verify the snapshot bank for slot 300607256, there was a significant problem starting the RPC node on the Solana mainnet. By understanding the cause of this issue, we can take steps to troubleshoot and resolve. This includes verifying the data and configuration used by the Solana runtime, verifying the compatibility of the wallet or key pair, and testing alternative solutions.

Recommendations:

• Check the documentation for the specific version of the Solana runtime you are using.

• Verify that the blockchain state is correct and up to date.

• Use a different wallet or key pair to see if the issue persists.

• Try using an alternative solution, such as a different RPC node or network.

Debug code:

If you encounter similar issues with your code, here are some debug code examples that show how to rebuild the 300607256 socket bank:

from solana.publickey import PublicKey
def rebuild_bank(bank_index):

Rebuild the bank at the specified index
bank = BankRebuildInfo(
key=PublicKey("some_key"),
// Add your logic here
)

Verify the rebuilt bank
try:
verification_result = VerificationResult.from_bank(bank)
if not verification_result.valid:
raise ValueError ("Verification failed")
except ValueError as e:
print (e)

Rebuild the 300607256 socket bank
rebuild_bank (300607256)

Please note that this is just a sample code snippet and may need to be adapted to your specific use case.

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