Had an out of disk space issue earlier which resulted in about 200 unassigned shards. I managed to force all but 4 of them to be assigned to the last index. I decided to manually rotate the deflector index, and then the number of unassigned shards increased to 8 (4 for the current index, 4 for the last one).
When I try using _cluster/reroute to force the shards to be assigned to an index, I get this error: “error”:“ElasticsearchIllegalArgumentException[resolved [graylog] into  nodes, where expected to a single node]”,“status”:400}
Any ideas how I can resolve this?