Hi, We are trying to split a single shard into two but we are encountering some issues we don't understand.
Our current setup: - 1 collection "col" - 1 shard "shard1" - 2 nodes, each having the whole collection (SolrCloud) - 1 core on each node "col_core" What we would like to have is: - 1 collection "col" - 2 shards: "shard1" and "shard2" - 2 nodes, each still having the whole collection, thus the 2 shards (SolrCloud) - 2 cores on each node: "col_core", "col_core2" We tried following actions: A) Create a new core "col_core2", then run the SPLIT (https://lucene.apache.org/solr/guide/7_6/coreadmin-api.html#coreadmin-split) action to split "col_core" to targetCore "col_core2" but we get the error "Core with core name col_core2 must be the only replica in shard shard2" B) Run the SPLITSHARD action to split the shard "shard1" into two other shards but we get the error "missing index size information for parent shard leader". What would be the best approach to do this splitting? And any idea why do we get these errors? (We are using Solr 7.6.0) Thanks for reading, Regards, Gaël
