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https://issues.apache.org/jira/browse/FLINK-39794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martijn Visser reassigned FLINK-39794:
--------------------------------------
Assignee: Martijn Visser
> Use loopback address in StreamNetworkBenchmarkEnvironment
> ---------------------------------------------------------
>
> Key: FLINK-39794
> URL: https://issues.apache.org/jira/browse/FLINK-39794
> Project: Flink
> Issue Type: Bug
> Components: Benchmarks, Test Infrastructure, Tests
> Reporter: Martijn Visser
> Assignee: Martijn Visser
> Priority: Major
> Labels: pull-request-available
>
> flink-runtime/src/test/java/.../StreamNetworkBenchmarkEnvironment.java
> initialises its bind address as:
> {code:java}
> private static final InetAddress LOCAL_ADDRESS;
> static {
> try {
> LOCAL_ADDRESS = InetAddress.getLocalHost();
> } catch (UnknownHostException e) {
> throw new Error(e);
> }
> }
> {code}
> This address is passed straight into NettyConfig{ and used as the server bind
> address by every benchmark that extends StreamNetworkBenchmarkEnvironment,
> including the SSL/OpenSSL variants of StreamNetworkThroughputBenchmark and
> StreamNetworkBroadcastThroughputBenchmark.
> On any host where InetAddress.getLocalHost() resolves the local hostname to a
> non-loopback IP whose reverse DNS does not match the test certificate
> (flink-runtime/src/test/resources/local127.keystore, SANs: localhost,
> 127.0.0.1, ::1), the SSL handshake in NettyClient.connect() fails with
> SSLHandshakeException: No subject alternative DNS name matching <fqdn> found.
> This is what caused FLINK-39787
> Proposed fix: the benchmark has no need for an externally-routable address -
> it always connects to itself within the same JVM. Replace getLocalHost() with
> getLoopbackAddress():
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