Я использую новый java.net.http.HttpClient
с методом sendAsync
.
HttpClient
находится внутри Singelton и создается один раз следующим образом:
HttpClient.newBuilder().build()
так что ничего особенного.
Эти запросы могут быть POST
или GET
, но я не знаю, что вызывает проблемы.
Всего несколько запросов в день, но время от времени один поток использует 100% ядра процессора. И не сразу, а через некоторое время, когда запрос закончится.
Поэтому я сделал дамп потока, когда было даже 2 из этих бесконечных циклов, выделялись следующие 2 потока:
"HttpClient-4-Worker-5" #144 daemon prio=5 os_prio=0 cpu=511298.10ms elapsed=520.71s tid=0x00007f684403e800 nid=0x2d6b runnable [0x00007f68ac162000]
java.lang.Thread.State: RUNNABLE
at jdk.internal.net.http.common.SSLFlowDelegate$Writer.processData([email protected]/SSLFlowDelegate.java:771)
at jdk.internal.net.http.common.SSLFlowDelegate$Writer$WriterDownstreamPusher.run([email protected]/SSLFlowDelegate.java:645)
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run([email protected]/SequentialScheduler.java:147)
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run([email protected]/SequentialScheduler.java:198)
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule([email protected]/SequentialScheduler.java:271)
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule([email protected]/SequentialScheduler.java:224)
at jdk.internal.net.http.common.SSLFlowDelegate$Writer.triggerWrite([email protected]/SSLFlowDelegate.java:722)
at jdk.internal.net.http.common.SSLFlowDelegate.doHandshake([email protected]/SSLFlowDelegate.java:1024)
at jdk.internal.net.http.common.SSLFlowDelegate.doClosure([email protected]/SSLFlowDelegate.java:1094)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader.unwrapBuffer([email protected]/SSLFlowDelegate.java:500)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader.processData([email protected]/SSLFlowDelegate.java:389)
- locked <0x00000000fba68950> (a java.lang.Object)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader$ReaderDownstreamPusher.run([email protected]/SSLFlowDelegate.java:263)
at jdk.internal.net.http.common.SequentialScheduler$SynchronizedRestartableTask.run([email protected]/SequentialScheduler.java:175)
- locked <0x00000000fbbca3e8> (a java.lang.Object)
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run([email protected]/SequentialScheduler.java:147)
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run([email protected]/SequentialScheduler.java:198)
at java.util.concurrent.ThreadPoolExecutor.runWorker([email protected]/ThreadPoolExecutor.java:1128)
at java.util.concurrent.ThreadPoolExecutor$Worker.run([email protected]/ThreadPoolExecutor.java:628)
at java.lang.Thread.run([email protected]/Thread.java:834)
Locked ownable synchronizers:
- <0x00000000fc1ff920> (a java.util.concurrent.ThreadPoolExecutor$Worker)
"HttpClient-4-Worker-2" #82 daemon prio=5 os_prio=0 cpu=4266156.67ms elapsed=4311.42s tid=0x00007f6844007000 nid=0x29ee runnable [0x00007f686fffd000]
java.lang.Thread.State: RUNNABLE
at jdk.internal.net.http.common.SSLFlowDelegate$Writer.processData([email protected]/SSLFlowDelegate.java:771)
at jdk.internal.net.http.common.SSLFlowDelegate$Writer$WriterDownstreamPusher.run([email protected]/SSLFlowDelegate.java:645)
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run([email protected]/SequentialScheduler.java:147)
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run([email protected]/SequentialScheduler.java:198)
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule([email protected]/SequentialScheduler.java:271)
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule([email protected]/SequentialScheduler.java:224)
at jdk.internal.net.http.common.SSLFlowDelegate$Writer.triggerWrite([email protected]/SSLFlowDelegate.java:722)
at jdk.internal.net.http.common.SSLFlowDelegate.doHandshake([email protected]/SSLFlowDelegate.java:1024)
at jdk.internal.net.http.common.SSLFlowDelegate.doClosure([email protected]/SSLFlowDelegate.java:1094)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader.unwrapBuffer([email protected]/SSLFlowDelegate.java:500)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader.processData([email protected]/SSLFlowDelegate.java:389)
- locked <0x00000000f97668d0> (a java.lang.Object)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader$ReaderDownstreamPusher.run([email protected]/SSLFlowDelegate.java:263)
at jdk.internal.net.http.common.SequentialScheduler$SynchronizedRestartableTask.run([email protected]/SequentialScheduler.java:175)
- locked <0x00000000f97668f0> (a java.lang.Object)
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run([email protected]/SequentialScheduler.java:147)
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run([email protected]/SequentialScheduler.java:198)
at java.util.concurrent.ThreadPoolExecutor.runWorker([email protected]/ThreadPoolExecutor.java:1128)
at java.util.concurrent.ThreadPoolExecutor$Worker.run([email protected]/ThreadPoolExecutor.java:628)
at java.lang.Thread.run([email protected]/Thread.java:834)
Locked ownable synchronizers:
- <0x00000000f9894cc0> (a java.util.concurrent.ThreadPoolExecutor$Worker)
То же наблюдение, но в другом контейнере, где была затронута только одна нить.
"HttpClient-3-Worker-2" #120 daemon prio=5 os_prio=0 cpu=1100568.51ms elapsed=1113.79s tid=0x00007eff3003b800 nid=0x479 runnable [0x00007eff83bf8000]
java.lang.Thread.State: RUNNABLE
at sun.security.ssl.SSLEngineImpl.wrap([email protected]/SSLEngineImpl.java:136)
- eliminated <0x00000000f9796e08> (a sun.security.ssl.SSLEngineImpl)
at sun.security.ssl.SSLEngineImpl.wrap([email protected]/SSLEngineImpl.java:116)
- locked <0x00000000f9796e08> (a sun.security.ssl.SSLEngineImpl)
at javax.net.ssl.SSLEngine.wrap([email protected]/SSLEngine.java:519)
at jdk.internal.net.http.common.SSLFlowDelegate$Writer.wrapBuffers([email protected]/SSLFlowDelegate.java:821)
at jdk.internal.net.http.common.SSLFlowDelegate$Writer.processData([email protected]/SSLFlowDelegate.java:736)
at jdk.internal.net.http.common.SSLFlowDelegate$Writer$WriterDownstreamPusher.run([email protected]/SSLFlowDelegate.java:645)
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run([email protected]/SequentialScheduler.java:147)
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run([email protected]/SequentialScheduler.java:198)
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule([email protected]/SequentialScheduler.java:271)
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule([email protected]/SequentialScheduler.java:224)
at jdk.internal.net.http.common.SSLFlowDelegate$Writer.triggerWrite([email protected]/SSLFlowDelegate.java:722)
at jdk.internal.net.http.common.SSLFlowDelegate.doHandshake([email protected]/SSLFlowDelegate.java:1024)
at jdk.internal.net.http.common.SSLFlowDelegate.doClosure([email protected]/SSLFlowDelegate.java:1094)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader.unwrapBuffer([email protected]/SSLFlowDelegate.java:500)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader.processData([email protected]/SSLFlowDelegate.java:389)
- locked <0x00000000f9797010> (a java.lang.Object)
at jdk.internal.net.http.common.SSLFlowDelegate$Reader$ReaderDownstreamPusher.run([email protected]/SSLFlowDelegate.java:263)
at jdk.internal.net.http.common.SequentialScheduler$SynchronizedRestartableTask.run([email protected]/SequentialScheduler.java:175)
- locked <0x00000000f9797030> (a java.lang.Object)
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run([email protected]/SequentialScheduler.java:147)
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run([email protected]/SequentialScheduler.java:198)
at java.util.concurrent.ThreadPoolExecutor.runWorker([email protected]/ThreadPoolExecutor.java:1128)
at java.util.concurrent.ThreadPoolExecutor$Worker.run([email protected]/ThreadPoolExecutor.java:628)
at java.lang.Thread.run([email protected]/Thread.java:834)
Пример кода, который я использую
httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString())
.thenApply(logResponse());
Java версия
openjdk version "11.0.2" 2019-01-15
OpenJDK Runtime Environment (build 11.0.2+9-Debian-3)
OpenJDK 64-Bit Server VM (build 11.0.2+9-Debian-3, mixed mode, sharing)
Проблема также возникает, когда вы предпочитаете HTTP 2
Обновления
Я неправильно использую HttpClient
?
Может ли это быть проблема сервера?
Может быть, это ошибка https://bugs.openjdk.java.net/browse/JDK-8207009?
- Клиент подключается к сервису cloudflare
- Когда возникает проблема, нет открытого соединения с cloudflare через netstat видимым
- Я могу прикрепить проблему к http2 + tlsv1.3 (используя образ докера nginx:
nginx:1.15-alpine
с включенным tls1.3, конечно)