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