@opentelemetry/otlp-exporter-base
Version:
OpenTelemetry OTLP Exporter base (for internal use only)
74 lines • 2.94 kB
JavaScript
;
/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.createRetryingTransport = void 0;
const api_1 = require("@opentelemetry/api");
const MAX_ATTEMPTS = 5;
const INITIAL_BACKOFF = 1000;
const MAX_BACKOFF = 5000;
const BACKOFF_MULTIPLIER = 1.5;
const JITTER = 0.2;
/**
* Get a pseudo-random jitter that falls in the range of [-JITTER, +JITTER]
*/
function getJitter() {
return Math.random() * (2 * JITTER) - JITTER;
}
class RetryingTransport {
_transport;
constructor(transport) {
this._transport = transport;
}
retry(data, timeoutMillis, inMillis) {
return new Promise((resolve, reject) => {
setTimeout(() => {
this._transport.send(data, timeoutMillis).then(resolve, reject);
}, inMillis);
});
}
async send(data, timeoutMillis) {
let attempts = MAX_ATTEMPTS;
let nextBackoff = INITIAL_BACKOFF;
const deadline = Date.now() + timeoutMillis;
let result = await this._transport.send(data, timeoutMillis);
while (result.status === 'retryable' && attempts > 0) {
attempts--;
// use maximum of computed backoff and 0 to avoid negative timeouts
const backoff = Math.max(Math.min(nextBackoff * (1 + getJitter()), MAX_BACKOFF), 0);
nextBackoff = nextBackoff * BACKOFF_MULTIPLIER;
const retryInMillis = result.retryInMillis ?? backoff;
// return when expected retry time is after the export deadline.
const remainingTimeoutMillis = deadline - Date.now();
if (retryInMillis > remainingTimeoutMillis) {
api_1.diag.info(`Export retry time ${Math.round(retryInMillis)}ms exceeds remaining timeout ${Math.round(remainingTimeoutMillis)}ms, not retrying further.`);
return result;
}
api_1.diag.verbose(`Scheduling export retry in ${Math.round(retryInMillis)}ms`);
result = await this.retry(data, remainingTimeoutMillis, retryInMillis);
}
if (result.status === 'success') {
api_1.diag.verbose(`Export succeeded after ${MAX_ATTEMPTS - attempts} retry attempts.`);
}
else if (result.status === 'retryable') {
api_1.diag.info(`Export failed after maximum retry attempts (${MAX_ATTEMPTS}).`);
}
else {
api_1.diag.info(`Export failed with non-retryable error: ${result.error}`);
}
return result;
}
shutdown() {
return this._transport.shutdown();
}
}
/**
* Creates an Exporter Transport that retries on 'retryable' response.
*/
function createRetryingTransport(options) {
return new RetryingTransport(options.transport);
}
exports.createRetryingTransport = createRetryingTransport;
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