presto-main/src/main/java/io/prestosql/server/ServerMainModule.java/ServerMainModule/createAsyncHttpTimeoutExecutor
class ServerMainModule:    @Provides
    @Singleton
    @ForAsyncHttp
    public static ScheduledExecutorService createAsyncHttpTimeoutExecutor(TaskManagerConfig config)
    {
        return newScheduledThreadPool(config.getHttpTimeoutThreads(), daemonThreadsNamed("async-http-timeout-%s"));
    }