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https://issues.apache.org/jira/browse/SOLR-10704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16048114#comment-16048114
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ASF subversion and git services commented on SOLR-10704:
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Commit 9612e318568e48ea187700accc1f6e88b1afea43 in lucene-solr's branch
refs/heads/branch_6x from [~ab]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=9612e31 ]
SOLR-10704 Update the ref guide.
> REPLACENODE can make the collection lost data which replicaFactor is 1
> -----------------------------------------------------------------------
>
> Key: SOLR-10704
> URL: https://issues.apache.org/jira/browse/SOLR-10704
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Affects Versions: 6.2
> Environment: Red Hat 4.8.3-9, JDK 1.8.0_121
> Reporter: Daisy.Yuan
> Assignee: Andrzej Bialecki
> Fix For: master (7.0), 6.7
>
> Attachments: 219.log, SOLR-10704.patch, SOLR-10704.patch
>
>
> When some replicas which the relative collection's replicaFactor is 1, it
> will lost data after executing the REPLACENODE cmd.
> It may be the new replica on the target node does not complete revovering,
> but the old replica on the source node was already be deleted.
> At last the target revocery failed for the following exception:
> 2017-05-18 17:08:48,587 | ERROR |
> recoveryExecutor-3-thread-2-processing-n:192.168.229.137:21103_solr
> x:replace-hdfs-coll1_shard1_replica2 s:shard1 c:replace-hdfs-coll1
> r:core_node3 | Error while trying to recover.
> core=replace-hdfs-coll1_shard1_replica2:java.lang.NullPointerException
> at org.apache.solr.update.PeerSync.alreadyInSync(PeerSync.java:339)
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