group.ngroups=true and multi shard

[Vincenzo D'Amore]

Hi,

I have a collection that is becoming bigger than usual (few millions of
documents) so we are doing a few tests to understand how to divide it in
multiple shards (solrcloud 8.11.1).

Strangely since we divided the index in 3 shards the ngroups value is not
always returned.
To be clear, executing the same query 10 times, can happen that 3/4 times
the ngroups value is not returned. We created the shard using
router.name=compositeId
and we have _route_ in the query.

Any suggestions?

Best regards,
Vincenzo

{"device-product-hash":{
    "pullReplicas":"0",
    "replicationFactor":"3",
    "shards":{
      "shard1":{
        "range":"80000000-d554ffff",
        "state":"active",
        "replicas":{
          "core_node7":{
            "core":"device-product-hash_shard1_replica_n4",
            "node_name":"solr-1.solrcluster.svc.cluster.local:8983_solr",
            "base_url":"
http://solr-1.solrcluster.svc.cluster.local:8983/solr";,
            "state":"active",
            "type":"NRT",
            "force_set_state":"false"},
          "core_node20":{
            "core":"device-product-hash_shard1_replica_n19",
            "node_name":"solr-0.solrcluster.svc.cluster.local:8983_solr",
            "base_url":"
http://solr-0.solrcluster.svc.cluster.local:8983/solr";,
            "state":"active",
            "type":"NRT",
            "force_set_state":"false",
            "leader":"true"}}},
      "shard2":{
        "range":"d5550000-2aa9ffff",
        "state":"active",
        "replicas":{
          "core_node13":{
            "core":"device-product-hash_shard2_replica_n10",
            "node_name":"solr-1.solrcluster.svc.cluster.local:8983_solr",
            "base_url":"
http://solr-1.solrcluster.svc.cluster.local:8983/solr";,
            "state":"active",
            "type":"NRT",
            "force_set_state":"false",
            "leader":"true"},
          "core_node22":{
            "core":"device-product-hash_shard2_replica_n21",
            "node_name":"solr-2.solrcluster.svc.cluster.local:8983_solr",
            "base_url":"
http://solr-2.solrcluster.svc.cluster.local:8983/solr";,
            "state":"active",
            "type":"NRT",
            "force_set_state":"false"}}},
      "shard3":{
        "range":"2aaa0000-7fffffff",
        "state":"active",
        "replicas":{
          "core_node24":{
            "core":"device-product-hash_shard3_replica_n23",
            "node_name":"solr-0.solrcluster.svc.cluster.local:8983_solr",
            "base_url":"
http://solr-0.solrcluster.svc.cluster.local:8983/solr";,
            "state":"active",
            "type":"NRT",
            "force_set_state":"false",
            "leader":"true"},
          "core_node28":{
            "core":"device-product-hash_shard3_replica_n27",
            "node_name":"solr-2.solrcluster.svc.cluster.local:8983_solr",
            "base_url":"
http://solr-2.solrcluster.svc.cluster.local:8983/solr";,
            "state":"active",
            "type":"NRT",
            "force_set_state":"false"}}}},
    "router":{"name":"compositeId"},
    "maxShardsPerNode":"-1",
    "autoAddReplicas":"false",
    "nrtReplicas":"3",
    "tlogReplicas":"0"}}




-- 
Vincenzo D'Amore