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https://issues.apache.org/jira/browse/HBASE-9539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13767870#comment-13767870
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Himanshu Vashishtha commented on HBASE-9539:
--------------------------------------------
The fix would be to add pre-namespace paths in the link so that when we try to
open the reader, it would look at older positions.
> Handle post namespace snapshot files when checking for HFile V1
> -----------------------------------------------------------------
>
> Key: HBASE-9539
> URL: https://issues.apache.org/jira/browse/HBASE-9539
> Project: HBase
> Issue Type: Bug
> Components: migration
> Affects Versions: 0.95.2
> Reporter: Himanshu Vashishtha
> Fix For: 0.98.0, 0.96.0
>
>
> When checking for HFileV1 before upgrading to 96, the snapshot file links
> tries to read from post-namespace locations. The migration script needs to be
> run on 94 cluster, and it requires reading the old (94) layout to check for
> HFileV1.
> {code}
> Got exception while reading trailer for file:
> hdfs://xxx:41020/cops/cluster_collection_events_snapshot/2086db948c484be62dcd76c170fe0b17/meta/cluster_collection_event=42037b88dbc34abff6cbfbb1fde2c900-c24b358ddd2f4429a7287258142841a2
> java.io.FileNotFoundException: Unable to open link:
> org.apache.hadoop.hbase.io.HFileLink
> locations=[hdfs://xxx:41020/hbase-96/data/default/cluster_collection_event/42037b88dbc34abff6cbfbb1fde2c900/meta/c24b358ddd2f4429a7287258142841a2,
>
> hdfs://xxx:41020/hbase-96/.tmp/data/default/cluster_collection_event/42037b88dbc34abff6cbfbb1fde2c900/meta/c24b358ddd2f4429a7287258142841a2,
>
> hdfs://xxx:41020/hbase-96/archive/data/default/cluster_collection_event/42037b88dbc34abff6cbfbb1fde2c900/meta/c24b358ddd2f4429a7287258142841a2]
> {code}
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