Connection resets to Maven Central

I’m getting connection resets to maven central (not getting these from travis on the same project). I’ve checked sonatype status, which seems green. Are there any issues going on? Are there workarounds (ex I might try using google mirror until this resolves)

Ex from https://circleci.com/gh/openzipkin/zipkin/1017 but also in similar builds from different projects:

Failed to execute goal org.codehaus.mojo:animal-sniffer-maven-plugin:1.15:check (default) on project zipkin-storage-mysql: Failed to obtain signature: org.codehaus.mojo.signature:java18:1.0: Could not transfer artifact org.codehaus.mojo.signature:java18:signature:1.0 from/to central (https://repo.maven.apache.org/maven2): Connection reset
[ERROR] org.codehaus.mojo.signature:java18:signature:1.0
[ERROR]