Shalin Shekhar Mangar created SOLR-11026:
--------------------------------------------
Summary: Policy can suggest more operations than necessary
Key: SOLR-11026
URL: https://issues.apache.org/jira/browse/SOLR-11026
Project: Solr
Issue Type: Sub-task
Security Level: Public (Default Security Level. Issues are Public)
Components: AutoScaling, SolrCloud
Reporter: Shalin Shekhar Mangar
Fix For: master (8.0), 7.1
To reproduce:
{code}
./bin/solr -e cloud -noprompt
{code}
Add policy and preferences:
{code}
{ 'set-cluster-policy': [ {'cores':'<10', 'node':'#ANY'},
{'replica':'<2', 'shard': '#EACH', 'node': '#ANY'},
{'nodeRole':'overseer', 'replica':0} ],
'set-cluster-preferences': [{'minimize': 'cores'}]
}
{code}
Add a trigger:
{code}
{
'set-trigger': {
'name' : 'node_added_trigger',
'event' : 'nodeAdded',
'waitFor' : '1s'
}
}
{code}
Shutdown a node (so only 1 is live)
{code}
./bin/solr stop -p 7574
{code}
Add a collection with 2 shards, 1 replica
{code}
http://localhost:8983/solr/admin/collections?action=create&name=test&replicationFactor=1&numShards=2&maxShardsPerNode=2&wt=json
{code}
The diagnostic output at this point is:
{code}
{
"responseHeader": {
"status": 0,
"QTime": 23
},
"diagnostics": {
"sortedNodes": [
{
"node": "127.0.1.1:8983_solr",
"cores": 2
}
],
"violations": []
},
"WARNING": "This response format is experimental. It is likely to change
in the future."
}
{code}
Start the other node that we had shutdown earlier:
{code}
"bin/solr" start -cloud -p 7574 -s "example/cloud/node2/solr" -z localhost:9983
{code}
The trigger kicks in but both cores are moved to the new node. Diagnostics
output at steady state:
{code}
{
"responseHeader": {
"status": 0,
"QTime": 23
},
"diagnostics": {
"sortedNodes": [
{
"node": "127.0.1.1:7574_solr",
"cores": 2
},
{
"node": "127.0.1.1:8983_solr",
"cores": 0
}
],
"violations": []
},
"WARNING": "This response format is experimental. It is likely to change
in the future."
}
{code}
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