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https://issues.apache.org/jira/browse/SOLR-9310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15396804#comment-15396804
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Shalin Shekhar Mangar commented on SOLR-9310:
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bq. am wondering why REPLAY flag is treated differently than PEER_SYNC
REPLAY updates are not written to update log because that would be redundant.
The update log itself is the source of the updates being replayed. PEER_SYNC
updates come from a different node and they certainly weren't present in the
local update log already (or else we would not have requested them). This is
why they must be written to the tlog.
> PeerSync fails on a node restart due to IndexFingerPrint mismatch
> -----------------------------------------------------------------
>
> Key: SOLR-9310
> URL: https://issues.apache.org/jira/browse/SOLR-9310
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Pushkar Raste
> Assignee: Noble Paul
> Attachments: SOLR-9310.patch, SOLR-9310.patch, SOLR-9310.patch
>
>
> I found that Peer Sync fails if a node restarts and documents were indexed
> while node was down. IndexFingerPrint check fails after recovering node
> applies updates.
> This happens only when node restarts and not if node just misses updates due
> reason other than it being down.
> Please check attached patch for the test.
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