End of log looks like this:
INFO: MISC: HttpClient-64-SelectorManager: HttpClient no longer referenced. Exiting...
Aug 22, 2018 8:20:41 AM jdk.internal.net.http.HttpClientImpl$SelectorManager run
INFO: CHANNEL: HttpClient-64-SelectorManager: stopping
Aug 22, 2018 8:20:41 AM jdk.internal.net.http.HttpClientImpl$SelectorManager shutdown
INFO: MISC: HttpClient-64-SelectorManager: shutting down
DEBUG: [HttpClient-64-SelectorManager] [10s 677ms] HttpClientImpl(64) SelectorManager shutting down
INFO: MISC: HttpClient-64-SelectorManager: HttpClient no longer referenced. Exiting...
Aug 22, 2018 8:20:41 AM jdk.internal.net.http.HttpClientImpl$SelectorManager run
INFO: CHANNEL: HttpClient-64-SelectorManager: stopping
Aug 22, 2018 8:20:41 AM jdk.internal.net.http.HttpClientImpl$SelectorManager shutdown
INFO: MISC: HttpClient-64-SelectorManager: shutting down
DEBUG: [HttpClient-64-SelectorManager] [10s 677ms] HttpClientImpl(64) SelectorManager shutting down