In the attached HttpCore 5.0 server program (gist <https://gist.github.com/rhashimoto/584d270dc6d00b97c01ffbc6ee5e8e6c>), I'm using Conscrypt for the TLS provider. It works, but I noticed that after each request the CPU gets pegged to 100% usage.
I'm using org.conscrypt:conscrypt-openjdk-uber:2.2.1 and HttpCore 5.0 from source at the HTTPCORE-599 fix <https://github.com/apache/httpcomponents-core/tree/44cab548cb4e15d56235aa12eaf0898d028351d0>. I see the same behavior on macOS Mojave and Debian Jessie. I'm using Conscrypt for ALPN on Java 8, though the minimal sample program here doesn't enable it <https://stackoverflow.com/a/53399363/1462337>. What I see in the debugger is that SingleCoreIOReactor.doExecute() is repeatedly called with this line <https://github.com/apache/httpcomponents-core/blob/a652854fb5e63dd8565ed199b48557043277a30d/httpcore5/src/main/java/org/apache/hc/core5/reactor/SingleCoreIOReactor.java#L113> returning readyCount=1. It looks like the selector is set to SelectionKey.OP_WRITE, Not sure if this is a HttpCore bug or a Conscrypt bug. I looked through the Conscrypt issues <https://github.com/google/conscrypt/issues> but nothing caught my attention as related. Roy
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