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https://issues.apache.org/jira/browse/SOLR-10178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15899427#comment-15899427
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Ishan Chattopadhyaya commented on SOLR-10178:
---------------------------------------------
Indeed, this was same as in master as well.
I realized that the following would always use a MergePolicyFactory:
{code}
systemSetPropertySolrTestsMergePolicyFactory(NoMergePolicyFactory.class.getName());
System.setProperty(SYSTEM_PROPERTY_SOLR_TESTS_USEMERGEPOLICYFACTORY,
"true");
System.setProperty(SYSTEM_PROPERTY_SOLR_TESTS_USEMERGEPOLICY, "false");
{code}
It seems that doing this is the only way to always use the
NoMergePolicyFactory, since we cannot use NoMergePolicy.
> TestInPlaceUpdatesDistrib unable to use NoMergePolicy[Factory] on branch_6x
> ---------------------------------------------------------------------------
>
> Key: SOLR-10178
> URL: https://issues.apache.org/jira/browse/SOLR-10178
> Project: Solr
> Issue Type: Test
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Ishan Chattopadhyaya
>
> TestInPlaceUpdatesDistrib depends on consistent segments to track docIds to
> assert in-place updates.
> Towards that, NoMergePolicy is best suited and working fine on master (by
> defining it using NoMergePolicyFactory).
> This doesn't work with just the MergePolicy
> (systemSetPropertySolrTestsMergePolicy()), since NoMergePolicy is a singleton
> and doesn't have a constructor. Setting only a NoMergePolicyFactory
> (systemSetPropertySolrTestsMergePolicyFactory()) seems to take no effect and
> falls back on RandomMergePolicyFactory. As a result, this test cannot use the
> NoMergePolicy[Factory].
> Here's the corresponding test failure:
> https://jenkins.thetaphi.de/job/Lucene-Solr-master-Linux/19012/
> Seems to me that SOLR-8668 needs to be backported to branch_6x for this test
> to work, or some other stopgap hack needs to be put in place to make it work
> before SOLR-8668 is backported. [~cpoerschke], WDYT?
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