nimbus-eth1/nimbus/sync/snap/worker/com/com_error.nim

105 lines
2.8 KiB
Nim

# Nimbus
# Copyright (c) 2021 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed
# except according to those terms.
import
chronos,
../../../sync_desc
const
comErrorsTimeoutMax* = 2
## Maximal number of non-resonses accepted in a row. If there are more than
## `comErrorsTimeoutMax` consecutive errors, the worker will be degraded
## as zombie.
type
ComErrorStatsRef* = ref object
## particular error counters so connections will not be cut immediately
## after a particular error.
nTimeouts*: uint
nNetwork*: uint
ComError* = enum
ComNothingSerious
ComAccountsMaxTooLarge
ComAccountsMinTooSmall
ComEmptyAccountsArguments
ComEmptyPartialRange
ComEmptyRequestArguments
ComMissingProof
ComNetworkProblem
ComNoAccountsForStateRoot
ComNoByteCodesAvailable
ComNoDataForProof
ComNoHeaderAvailable
ComNoStorageForAccounts
ComNoTrieNodesAvailable
ComResponseTimeout
ComTooManyByteCodes
ComTooManyHeaders
ComTooManyStorageSlots
ComTooManyTrieNodes
# Other errors not directly related to communication
ComInspectDbFailed
ComImportAccountsFailed
proc stopAfterSeriousComError*(
ctrl: BuddyCtrlRef;
error: ComError;
stats: ComErrorStatsRef;
): Future[bool]
{.async.} =
## Error handling after data protocol failed.
case error:
of ComResponseTimeout:
stats.nTimeouts.inc
if comErrorsTimeoutMax < stats.nTimeouts:
# Mark this peer dead, i.e. avoid fetching from this peer for a while
ctrl.zombie = true
else:
# Otherwise try again some time later. Nevertheless, stop the
# current action.
await sleepAsync(5.seconds)
return true
of ComNetworkProblem,
ComMissingProof,
ComAccountsMinTooSmall,
ComAccountsMaxTooLarge:
stats.nNetwork.inc
# Mark this peer dead, i.e. avoid fetching from this peer for a while
ctrl.zombie = true
return true
of ComEmptyAccountsArguments,
ComEmptyRequestArguments,
ComEmptyPartialRange,
ComInspectDbFailed,
ComImportAccountsFailed,
ComNoDataForProof,
ComNothingSerious:
discard
of ComNoAccountsForStateRoot,
ComNoStorageForAccounts,
ComNoByteCodesAvailable,
ComNoHeaderAvailable,
ComNoTrieNodesAvailable,
ComTooManyByteCodes,
ComTooManyHeaders,
ComTooManyStorageSlots,
ComTooManyTrieNodes:
# Mark this peer dead, i.e. avoid fetching from this peer for a while
ctrl.zombie = true
return true
# End