[jira] [Created] (SOLR-8609) When there are multiple nodes oIn a host, snitch‘s rule override parameter 'maxShardsPerNode'

["davidchiu (JIRA)" <ji...@apache.org>]

davidchiu created SOLR-8609:
-------------------------------

             Summary: When there are multiple nodes oIn a host, snitch‘s rule override parameter 'maxShardsPerNode'
                 Key: SOLR-8609
                 URL: https://issues.apache.org/jira/browse/SOLR-8609
             Project: Solr
          Issue Type: Bug
          Components: Rules
    Affects Versions: 5.4.1, 5.4, 5.3.1, 5.3, 5.2
            Reporter: davidchiu


I have 3 hosts, deployed 5 solr nodes(instances) in per hosts, so there are 5*3=15 nodes in my environment. 
I created collection with snitch rule(Don’t assign more than 1 replica of a collection's shard to a host.).
At last, I got following information:

The create command like this:
curl --negotiate -v "http://node01:8983/solr/admin/collections?action=CREATE&name=test1&collection.configName=SchemaTest1&numShards=15&replicationFactor=3&wt=json&indent=true&maxShardsPerNode=3&rule=host:*,shard:*,replica:1"

There are 4 shards on a node as follwong information, but the  maxShardsPerNode is 3.
drwx------ 2 root root 4096 Jan 28 19:48 test1_shard10_replica2
drwx------ 2 root root 4096 Jan 28 19:48 test1_shard11_replica1
drwx------ 2 root root 4096 Jan 28 19:48 test1_shard12_replica3
drwx------ 2 root root 4096 Jan 28 19:48 test1_shard14_replica3

and there are 1 or 2 shards on some other nodes. such as:
drwx------ 2 root root 4096 Jan 28 19:48 test1_shard17_replica2
drwx------ 2 root root 4096 Jan 28 19:48 test1_shard9_replica1

As if the snitch rule override the paramter maxShardsPerNode;
When I remove the rule, there are 3 shards on per node in balance.

In fact, I want that there are 3 shard on per node in balance, and very shard's replica on other host. How can I get it?



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