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https://issues.apache.org/jira/browse/SOLR-9847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15764692#comment-15764692
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ASF subversion and git services commented on SOLR-9847:
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Commit cfbfc13209c57e1c76bd478c3b584135b5d109eb in lucene-solr's branch
refs/heads/branch_6x from [~steve_rowe]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=cfbfc13 ]
SOLR-9847: Stop blocking further schema updates while waiting for a pending
update to propagate to other replicas. This reduces the likelihood of a
(time-limited) distributed deadlock during concurrent schema updates.
> Deadlock on ManagedIndexSchema lock.
> ------------------------------------
>
> Key: SOLR-9847
> URL: https://issues.apache.org/jira/browse/SOLR-9847
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Mark Miller
> Attachments:
> SOLR-9847-release-lock-before-replica-version-agreement.patch, SOLR-9847.patch
>
>
> Seems we hold the lock while in
> ManagedIndexSchema.waitForSchemaZkVersionAgreement, so we may never see
> agreement because are updates may also be waiting on that lock.
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