Andrzej Bialecki created SOLR-14409:
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Summary: Existing violations allow bypassing policy rules when
adding new replicas
Key: SOLR-14409
URL: https://issues.apache.org/jira/browse/SOLR-14409
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: AutoScaling
Affects Versions: 8.5, master (9.0), 8.6
Reporter: Andrzej Bialecki
Assignee: Andrzej Bialecki
Steps to reproduce:
* start with an empty cluster policy.
* create a collection with as many replicas as there are nodes.
* add one more replica to any node. Now this node has two replicas, all other
nodes have one.
* define the following cluster policy:
{code:java}
{ 'set-cluster-policy': [ {'replica': '<2', 'shard': '#ANY', 'node': '#ANY',
'strict': true} ] } {code}
This automatically creates a violation because of the existing layout.
* try adding one more replica. This should fail because no node satisfies the
rules (there must be at most 1 replica per node). However, the command succeeds
and adds replica to the node that already has 2 replicas, which clearly
violates the policy and makes matters even worse.
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