我使用 Java 16 通过 HTTP 向 API 发出请求。为了整体加快速度，我将其加载到自定义ForkJoinPool. 我在下面编译了一个重现示例。
自从迁移到 Java 17（openjdk build 17.0.1+12-39）后，这会抛出 RejectedExecutionException：
Caused by: java.util.concurrent.RejectedExecutionException: Thread limit exceeded replacing blocked worker
at java.base/java.util.concurrent.ForkJoinPool.tryCompensate(ForkJoinPool.java:1819)
at java.base/java.util.concurrent.ForkJoinPool.compensatedBlock(ForkJoinPool.java:3446)
at java.base/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3432)
at java.base/java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1898)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2072)
at java.net.http/jdk.internal.net.http.HttpClientImpl.send(HttpClientImpl.java:553)
at java.net.http/jdk.internal.net.http.HttpClientFacade.send(HttpClientFacade.java:119)
at Test.lambda$retrieveMany$1(Test.java:30)
为什么会出现这种情况？ForkJoinPool 是否发生了我不知道的变化？
代码
Caused by: java.util.concurrent.RejectedExecutionException: Thread limit exceeded replacing blocked worker
at java.base/java.util.concurrent.ForkJoinPool.tryCompensate(ForkJoinPool.java:1819)
at java.base/java.util.concurrent.ForkJoinPool.compensatedBlock(ForkJoinPool.java:3446)
at java.base/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3432)
at java.base/java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1898)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2072)
at java.net.http/jdk.internal.net.http.HttpClientImpl.send(HttpClientImpl.java:553)
at java.net.http/jdk.internal.net.http.HttpClientFacade.send(HttpClientFacade.java:119)
at Test.lambda$retrieveMany$1(Test.java:30)