Erik, Looks like we're also running into this issue. https://www.mail-archive.com/solr-user@lucene.apache.org/msg153798.html
Is there any think we can do to remedy this besides a node restart, which causes leader re-election on the good shards which causes them to also become un-operational? -- Sent from: https://lucene.472066.n3.nabble.com/Solr-User-f472068.html