Currently the integration tests have been failing on Jenkins since around May 29th. It looks like there is a rogue process that has Auth enabled that is causing this problem. (Port 38603)
For some reason a lot of the bin/solr commands choose to connect to this process instead of the SOLR_PORT that is in use by the integration tests at that point. I have a PR for making all commands in bin/solr use the same port defaulting, but that can really only land in 10.0. In the meantime we should see if infra can stop that rogue process so that the tests can start passing. - Houston
