I had a PR build fail with an issue with the Zookeeper cache. https://travis-ci.org/apache/metron/builds/365122993
Failed tests:
ZKConfigurationsCacheIntegrationTest.validateUpdate:230->lambda$validateUpdate$9:230
expected:<{hdfs={index=yaf, batchSize=1, enabled=true},
elasticsearch={index=yaf, batchSize=25, batchTimeout=7,
enabled=false}, solr={index=yaf, batchSize=5, enabled=false}}> but
was:<{}>
It passed when I ran it again.
