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44 lines
1.5 KiB
JavaScript

'use strict';
const MongoNetworkError = require('mongodb-core').MongoNetworkError;
const mongoErrorContextSymbol = require('mongodb-core').mongoErrorContextSymbol;
const GET_MORE_NON_RESUMABLE_CODES = new Set([
136, // CappedPositionLost
237, // CursorKilled
11601 // Interrupted
]);
// From spec@https://github.com/mongodb/specifications/blob/35e466ddf25059cb30e4113de71cdebd3754657f/source/change-streams.rst#resumable-error:
//
// An error is considered resumable if it meets any of the following criteria:
// - any error encountered which is not a server error (e.g. a timeout error or network error)
// - any server error response from a getMore command excluding those containing the following error codes
// - Interrupted: 11601
// - CappedPositionLost: 136
// - CursorKilled: 237
// - a server error response with an error message containing the substring "not master" or "node is recovering"
//
// An error on an aggregate command is not a resumable error. Only errors on a getMore command may be considered resumable errors.
function isGetMoreError(error) {
if (error[mongoErrorContextSymbol]) {
return error[mongoErrorContextSymbol].isGetMore;
}
}
function isResumableError(error) {
if (!isGetMoreError(error)) {
return false;
}
return !!(
error instanceof MongoNetworkError ||
!GET_MORE_NON_RESUMABLE_CODES.has(error.code) ||
error.message.match(/not master/) ||
error.message.match(/node is recovering/)
);
}
module.exports = { GET_MORE_NON_RESUMABLE_CODES, isResumableError };