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https://issues.apache.org/jira/browse/SOLR-7935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14700561#comment-14700561
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Yonik Seeley commented on SOLR-7935:
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OK, so what I think is happening here:
- ulog is reused for the new core
- ulog has a reference to the uhandler that is set at the end of the DUH2
constructor
- a request that needs a version check comes in after the ulog.uhandler
reference is set, but before the core.uhandler reference is set, leading to a
NPE when it is used to try and open a new realtime searcher
> NPE from VersionInfo.lookupVersion during core reload
> -----------------------------------------------------
>
> Key: SOLR-7935
> URL: https://issues.apache.org/jira/browse/SOLR-7935
> Project: Solr
> Issue Type: Bug
> Reporter: Yonik Seeley
>
> The test from SOLR-7836 sometimes fails with a NPE where an add looks up
> version info from the index.
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