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8330814: Cleanups for KeepAliveCache tests
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Backport-of: a5005c87c4d5598eb54e9824105767d833f9660b
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@RealCLanger
RealCLanger committed May 21, 2024
1 parent 9836209 commit 1e173f9
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Showing 5 changed files with 221 additions and 177 deletions.
253 changes: 136 additions & 117 deletions test/jdk/sun/net/www/http/KeepAliveCache/B5045306.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
Expand All @@ -24,9 +24,9 @@
/*
* @test
* @bug 5045306 6356004 6993490 8255124
* @summary Http keep-alive implementation is not efficient
* @library /test/lib
* @run main/othervm B5045306
* @summary Http keep-alive implementation is not efficient
*/

import java.io.IOException;
Expand All @@ -42,14 +42,17 @@
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

import jdk.test.lib.net.URIBuilder;

/* Part 1:
* The http client makes a connection to a URL whos content contains a lot of
* The http client makes a connection to a URL whose content contains a lot of
* data, more than can fit in the socket buffer. The client only reads
* 1 byte of the data from the InputStream leaving behind more data than can
* fit in the socket buffer. The client then makes a second call to the http
Expand All @@ -63,150 +66,166 @@

public class B5045306 {
static HttpServer server;

public static void main(String[] args) {
startHttpServer();
clientHttpCalls();
}
static ExecutorService executor = Executors.newSingleThreadExecutor();

public static void startHttpServer() {
try {
server = HttpServer.create(new InetSocketAddress(InetAddress.getLocalHost(), 0), 10, "/", new SimpleHttpTransactionHandler());
server.setExecutor(Executors.newSingleThreadExecutor());
server.start();
server = HttpServer.create(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0), 10, "/", new SimpleHttpTransactionHandler());
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
server.setExecutor(executor);
server.start();
System.out.println("http server listens on: " + server.getAddress());
}

public static void clientHttpCalls() {
public static void stopHttpServer() {
server.stop(1);
executor.shutdown();
}

public static void clientHttpCalls() throws Exception {
List<Throwable> uncaught = new ArrayList<>();
Thread.setDefaultUncaughtExceptionHandler((t, ex) -> {
uncaught.add(ex);
});
try {
System.out.println("http server listen on: " + server.getAddress().getPort());
String hostAddr = InetAddress.getLocalHost().getHostAddress();
if (hostAddr.indexOf(':') > -1) hostAddr = "[" + hostAddr + "]";
String baseURLStr = "http://" + hostAddr + ":" + server.getAddress().getPort() + "/";

URL bigDataURL = new URL (baseURLStr + "firstCall");
URL smallDataURL = new URL (baseURLStr + "secondCall");
URL bigDataURL = URIBuilder.newBuilder()
.scheme("http")
.loopback()
.port(server.getAddress().getPort())
.path("/firstCall")
.toURL();

URL smallDataURL = URIBuilder.newBuilder()
.scheme("http")
.loopback()
.port(server.getAddress().getPort())
.path("/secondCall")
.toURL();

HttpURLConnection uc = (HttpURLConnection)bigDataURL.openConnection(Proxy.NO_PROXY);
HttpURLConnection uc = (HttpURLConnection)bigDataURL.openConnection(Proxy.NO_PROXY);

//Only read 1 byte of response data and close the stream
InputStream is = uc.getInputStream();
// Only read 1 byte of response data and close the stream
try (InputStream is = uc.getInputStream()) {
byte[] ba = new byte[1];
is.read(ba);
is.close();

// Allow the KeepAliveStreamCleaner thread to read the data left behind and cache the connection.
try { Thread.sleep(2000); } catch (Exception e) {}

uc = (HttpURLConnection)smallDataURL.openConnection(Proxy.NO_PROXY);
uc.getResponseCode();

if (SimpleHttpTransactionHandler.failed)
throw new RuntimeException("Failed: Initial Keep Alive Connection is not being reused");

// Part 2
URL part2Url = new URL (baseURLStr + "part2");
uc = (HttpURLConnection)part2Url.openConnection(Proxy.NO_PROXY);
is = uc.getInputStream();
is.close();

// Allow the KeepAliveStreamCleaner thread to try and read the data left behind and cache the connection.
try { Thread.sleep(2000); } catch (Exception e) {}

ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
if (threadMXBean.isThreadCpuTimeSupported()) {
long[] threads = threadMXBean.getAllThreadIds();
ThreadInfo[] threadInfo = threadMXBean.getThreadInfo(threads);
for (int i=0; i<threadInfo.length; i++) {
if (threadInfo[i].getThreadName().equals("Keep-Alive-SocketCleaner")) {
System.out.println("Found Keep-Alive-SocketCleaner thread");
long threadID = threadInfo[i].getThreadId();
long before = threadMXBean.getThreadCpuTime(threadID);
try { Thread.sleep(2000); } catch (Exception e) {}
long after = threadMXBean.getThreadCpuTime(threadID);

if (before ==-1 || after == -1)
break; // thread has died, OK

// if Keep-Alive-SocketCleaner consumes more than 50% of cpu then we
// can assume a recursive loop.
long total = after - before;
if (total >= 1000000000) // 1 second, or 1 billion nanoseconds
throw new RuntimeException("Failed: possible recursive loop in Keep-Alive-SocketCleaner");
}
}

// Allow the KeepAliveStreamCleaner thread to read the data left behind and cache the connection.
try { Thread.sleep(2000); } catch (Exception e) {}

uc = (HttpURLConnection)smallDataURL.openConnection(Proxy.NO_PROXY);
uc.getResponseCode();

if (SimpleHttpTransactionHandler.failed)
throw new RuntimeException("Failed: Initial Keep Alive Connection is not being reused");

// Part 2
URL part2Url = URIBuilder.newBuilder()
.scheme("http")
.loopback()
.port(server.getAddress().getPort())
.path("/part2")
.toURL();

uc = (HttpURLConnection)part2Url.openConnection(Proxy.NO_PROXY);
try (InputStream is = uc.getInputStream()) {}

// Allow the KeepAliveStreamCleaner thread to try and read the data left behind and cache the connection.
try { Thread.sleep(2000); } catch (Exception e) {}

ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
if (threadMXBean.isThreadCpuTimeSupported()) {
long[] threads = threadMXBean.getAllThreadIds();
ThreadInfo[] threadInfo = threadMXBean.getThreadInfo(threads);
for (int i = 0; i < threadInfo.length; i++) {
if (threadInfo[i].getThreadName().equals("Keep-Alive-SocketCleaner")) {
System.out.println("Found Keep-Alive-SocketCleaner thread");
long threadID = threadInfo[i].getThreadId();
long before = threadMXBean.getThreadCpuTime(threadID);
try { Thread.sleep(2000); } catch (Exception e) {}
long after = threadMXBean.getThreadCpuTime(threadID);

if (before ==-1 || after == -1)
break; // thread has died, OK

// if Keep-Alive-SocketCleaner consumes more than 50% of cpu then we
// can assume a recursive loop.
long total = after - before;
if (total >= 1000000000) // 1 second, or 1 billion nanoseconds
throw new RuntimeException("Failed: possible recursive loop in Keep-Alive-SocketCleaner");
}
}

} catch (IOException e) {
e.printStackTrace();
} finally {
server.stop(1);
}
if (!uncaught.isEmpty()) {
throw new RuntimeException("Unhandled exception:", uncaught.get(0));
}
}
}

class SimpleHttpTransactionHandler implements HttpHandler
{
static volatile boolean failed = false;
static class SimpleHttpTransactionHandler implements HttpHandler {
static volatile boolean failed = false;

// Need to have enough data here that is too large for the socket buffer to hold.
// Also http.KeepAlive.remainingData must be greater than this value, default is 256K.
static final int RESPONSE_DATA_LENGTH = 128 * 1024;
// Need to have enough data here that is too large for the socket buffer to hold.
// Also http.KeepAlive.remainingData must be greater than this value, default is 256K.
static final int RESPONSE_DATA_LENGTH = 128 * 1024;

int port1;
int port1;

public void handle(HttpExchange trans) {
try {
String path = trans.getRequestURI().getPath();
if (path.equals("/firstCall")) {
port1 = trans.getRemoteAddress().getPort();
System.out.println("First connection on client port = " + port1);

byte[] responseBody = new byte[RESPONSE_DATA_LENGTH];
for (int i=0; i<responseBody.length; i++)
responseBody[i] = 0x41;
trans.sendResponseHeaders(200, responseBody.length);
try (OutputStream os = trans.getResponseBody()) {
public void handle(HttpExchange trans) {
try {
String path = trans.getRequestURI().getPath();
if (path.equals("/firstCall")) {
port1 = trans.getRemoteAddress().getPort();
System.out.println("First connection on client port = " + port1);

byte[] responseBody = new byte[RESPONSE_DATA_LENGTH];
for (int i=0; i<responseBody.length; i++)
responseBody[i] = 0x41;
trans.sendResponseHeaders(200, responseBody.length);
try (OutputStream os = trans.getResponseBody()) {
os.write(responseBody);
}
} else if (path.equals("/secondCall")) {
int port2 = trans.getRemoteAddress().getPort();
System.out.println("Second connection on client port = " + port2);

if (port1 != port2)
failed = true;

/* Force the server to not respond for more that the timeout
* set by the keepalive cleaner (5000 millis). This ensures the
* timeout is correctly resets the default read timeout,
* infinity. See 6993490. */
System.out.println("server sleeping...");
try {Thread.sleep(6000); } catch (InterruptedException e) {}
trans.sendResponseHeaders(200, -1);
} else if (path.equals("/part2")) {
System.out.println("Call to /part2");
byte[] responseBody = new byte[RESPONSE_DATA_LENGTH];
for (int i=0; i<responseBody.length; i++)
responseBody[i] = 0x41;
// override the Content-length header to be greater than the actual response body
trans.sendResponseHeaders(200, responseBody.length+1);
OutputStream os = trans.getResponseBody();
os.write(responseBody);
// now close the socket
// closing the stream here would throw; close the exchange instead
trans.close();
}
} else if (path.equals("/secondCall")) {
int port2 = trans.getRemoteAddress().getPort();
System.out.println("Second connection on client port = " + port2);

if (port1 != port2)
failed = true;

/* Force the server to not respond for more that the timeout
* set by the keepalive cleaner (5000 millis). This ensures the
* timeout is correctly resets the default read timeout,
* infinity. See 6993490. */
System.out.println("server sleeping...");
try {Thread.sleep(6000); } catch (InterruptedException e) {}
trans.sendResponseHeaders(200, -1);
} else if(path.equals("/part2")) {
System.out.println("Call to /part2");
byte[] responseBody = new byte[RESPONSE_DATA_LENGTH];
for (int i=0; i<responseBody.length; i++)
responseBody[i] = 0x41;
// override the Content-length header to be greater than the actual response body
trans.sendResponseHeaders(200, responseBody.length+1);
OutputStream os = trans.getResponseBody();
os.write(responseBody);
// now close the socket
// closing the stream here would throw; close the exchange instead
trans.close();
} catch (Exception e) {
e.printStackTrace();
failed = true;
}
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) throws Exception {
startHttpServer();
try {
clientHttpCalls();
} finally {
stopHttpServer();
}
}
}
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3 comments on commit 1e173f9

@openjdk-notifier
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Review

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@RealCLanger
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/backport jdk21u-dev

@openjdk
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@openjdk openjdk bot commented on 1e173f9 May 21, 2024

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@RealCLanger the backport was successfully created on the branch backport-RealCLanger-1e173f9d in my personal fork of openjdk/jdk21u-dev. To create a pull request with this backport targeting openjdk/jdk21u-dev:master, just click the following link:

➡️ Create pull request

The title of the pull request is automatically filled in correctly and below you find a suggestion for the pull request body:

Hi all,

This pull request contains a backport of commit 1e173f9d from the openjdk/jdk22u repository.

The commit being backported was authored by Christoph Langer on 21 May 2024 and had no reviewers.

Thanks!

If you need to update the source branch of the pull then run the following commands in a local clone of your personal fork of openjdk/jdk21u-dev:

$ git fetch https://github.com/openjdk-bots/jdk21u-dev.git backport-RealCLanger-1e173f9d:backport-RealCLanger-1e173f9d
$ git checkout backport-RealCLanger-1e173f9d
# make changes
$ git add paths/to/changed/files
$ git commit --message 'Describe additional changes made'
$ git push https://github.com/openjdk-bots/jdk21u-dev.git backport-RealCLanger-1e173f9d

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