forked from apache/iceberg
/
ExponentialHttpRequestRetryStrategy.java
151 lines (139 loc) · 5.57 KB
/
ExponentialHttpRequestRetryStrategy.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.iceberg.rest;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.ConnectException;
import java.net.NoRouteToHostException;
import java.net.UnknownHostException;
import java.time.Instant;
import java.util.Set;
import java.util.concurrent.ThreadLocalRandom;
import javax.net.ssl.SSLException;
import org.apache.hc.client5.http.HttpRequestRetryStrategy;
import org.apache.hc.client5.http.utils.DateUtils;
import org.apache.hc.core5.concurrent.CancellableDependency;
import org.apache.hc.core5.http.ConnectionClosedException;
import org.apache.hc.core5.http.Header;
import org.apache.hc.core5.http.HttpHeaders;
import org.apache.hc.core5.http.HttpRequest;
import org.apache.hc.core5.http.HttpResponse;
import org.apache.hc.core5.http.HttpStatus;
import org.apache.hc.core5.http.Method;
import org.apache.hc.core5.http.protocol.HttpContext;
import org.apache.hc.core5.util.TimeValue;
import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
import org.apache.iceberg.relocated.com.google.common.collect.ImmutableSet;
/**
* Defines an exponential HTTP request retry strategy and provides the same characteristics as the
* {@link org.apache.hc.client5.http.impl.DefaultHttpRequestRetryStrategy}, using the following list
* of non-retriable I/O exception classes:
*
* <ul>
* <li>InterruptedIOException
* <li>UnknownHostException
* <li>ConnectException
* <li>ConnectionClosedException
* <li>NoRouteToHostException
* <li>SSLException
* </ul>
*
* The following retriable HTTP status codes are defined:
*
* <ul>
* <li>SC_TOO_MANY_REQUESTS (429)
* <li>SC_SERVICE_UNAVAILABLE (503)
* </ul>
*
* Most code and behavior is taken from {@link
* org.apache.hc.client5.http.impl.DefaultHttpRequestRetryStrategy}, with minor modifications to
* {@link #getRetryInterval(HttpResponse, int, HttpContext)} to achieve exponential backoff.
*/
class ExponentialHttpRequestRetryStrategy implements HttpRequestRetryStrategy {
private final int maxRetries;
private final Set<Class<? extends IOException>> nonRetriableExceptions;
private final Set<Integer> retriableCodes;
ExponentialHttpRequestRetryStrategy(int maximumRetries) {
Preconditions.checkArgument(
maximumRetries > 0, "Cannot set retries to %s, the value must be positive", maximumRetries);
this.maxRetries = maximumRetries;
this.retriableCodes =
ImmutableSet.of(HttpStatus.SC_TOO_MANY_REQUESTS, HttpStatus.SC_SERVICE_UNAVAILABLE);
this.nonRetriableExceptions =
ImmutableSet.of(
InterruptedIOException.class,
UnknownHostException.class,
ConnectException.class,
ConnectionClosedException.class,
NoRouteToHostException.class,
SSLException.class);
}
@Override
public boolean retryRequest(
HttpRequest request, IOException exception, int execCount, HttpContext context) {
if (execCount > maxRetries) {
// Do not retry if over max retries
return false;
}
if (nonRetriableExceptions.contains(exception.getClass())) {
return false;
} else {
for (Class<? extends IOException> rejectException : nonRetriableExceptions) {
if (rejectException.isInstance(exception)) {
return false;
}
}
}
if (request instanceof CancellableDependency
&& ((CancellableDependency) request).isCancelled()) {
return false;
}
// Retry if the request is considered idempotent
return Method.isIdempotent(request.getMethod());
}
@Override
public boolean retryRequest(HttpResponse response, int execCount, HttpContext context) {
return execCount <= maxRetries && retriableCodes.contains(response.getCode());
}
@Override
public TimeValue getRetryInterval(HttpResponse response, int execCount, HttpContext context) {
// a server may send a 429 / 503 with a Retry-After header
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Retry-After
Header header = response.getFirstHeader(HttpHeaders.RETRY_AFTER);
TimeValue retryAfter = null;
if (header != null) {
String value = header.getValue();
try {
retryAfter = TimeValue.ofSeconds(Long.parseLong(value));
} catch (NumberFormatException ignore) {
Instant retryAfterDate = DateUtils.parseStandardDate(value);
if (retryAfterDate != null) {
retryAfter =
TimeValue.ofMilliseconds(retryAfterDate.toEpochMilli() - System.currentTimeMillis());
}
}
if (TimeValue.isPositive(retryAfter)) {
return retryAfter;
}
}
int delayMillis = 1000 * (int) Math.min(Math.pow(2.0, (long) execCount - 1), 64.0);
int jitter = ThreadLocalRandom.current().nextInt(Math.max(1, (int) (delayMillis * 0.1)));
return TimeValue.ofMilliseconds(delayMillis + jitter);
}
}