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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16189) [Rolling Upgrade] 2.0 hfiles cannot be opened by 1.x servers
Date Thu, 07 Jul 2016 07:22:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15365730#comment-15365730
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Anoop Sam John commented on HBASE-16189:
----------------------------------------

I can do this if you are not working on it [~enis]

> [Rolling Upgrade] 2.0 hfiles cannot be opened by 1.x servers
> ------------------------------------------------------------
>
>                 Key: HBASE-16189
>                 URL: https://issues.apache.org/jira/browse/HBASE-16189
>             Project: HBase
>          Issue Type: Sub-task
>          Components: migration
>            Reporter: Enis Soztutar
>            Priority: Critical
>             Fix For: 1.4.0
>
>
> HBASE-10800 added MetaCellComparator, which gets written to the HFile. 1.x code does
not have the new class, hence fails to open the regions. I did not check whether this is only
for meta or for regular tables as well. 
> {code}
> Caused by: org.apache.hadoop.hbase.io.hfile.CorruptHFileException: Problem reading HFile
Trailer from file hdfs://cn017.l42scl.hortonworks.com:8020/apps/hbase/data/data/hbase/meta/1588230740/info/aa96e4ef463b4a82956330b236440437
>         at org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion(HFile.java:483)
>         at org.apache.hadoop.hbase.io.hfile.HFile.createReader(HFile.java:511)
>         at org.apache.hadoop.hbase.regionserver.StoreFile$Reader.<init>(StoreFile.java:1123)
>         at org.apache.hadoop.hbase.regionserver.StoreFileInfo.open(StoreFileInfo.java:267)
>         at org.apache.hadoop.hbase.regionserver.StoreFile.open(StoreFile.java:409)
>         at org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:512)
>         at org.apache.hadoop.hbase.regionserver.HStore.createStoreFileAndReader(HStore.java:687)
>         at org.apache.hadoop.hbase.regionserver.HStore.access$000(HStore.java:130)
>         at org.apache.hadoop.hbase.regionserver.HStore$1.call(HStore.java:554)
>         at org.apache.hadoop.hbase.regionserver.HStore$1.call(HStore.java:551)
>         ... 6 more
> Caused by: java.io.IOException: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.CellComparator$MetaCellComparator
>         at org.apache.hadoop.hbase.io.hfile.FixedFileTrailer.getComparatorClass(FixedFileTrailer.java:581)
>         at org.apache.hadoop.hbase.io.hfile.FixedFileTrailer.deserializeFromPB(FixedFileTrailer.java:300)
>         at org.apache.hadoop.hbase.io.hfile.FixedFileTrailer.deserialize(FixedFileTrailer.java:242)
>         at org.apache.hadoop.hbase.io.hfile.FixedFileTrailer.readFromStream(FixedFileTrailer.java:407)
>         at org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion(HFile.java:468)
>         ... 15 more
> Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.CellComparator$MetaCellComparator
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
>         at java.lang.Class.forName0(Native Method)
>         at java.lang.Class.forName(Class.java:264)
>         at org.apache.hadoop.hbase.io.hfile.FixedFileTrailer.getComparatorClass(FixedFileTrailer.java:579)
> {code}



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