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https://issues.apache.org/jira/browse/HBASE-21001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16607648#comment-16607648
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Mingliang Liu commented on HBASE-21001:
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Nit: we don't need to call {{region.close}} explicitly in UT after
[HBASE-21138].
> ReplicationObserver fails to load in HBase 2.0.0
> ------------------------------------------------
>
> Key: HBASE-21001
> URL: https://issues.apache.org/jira/browse/HBASE-21001
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.0.0-alpha-4, 2.0.0
> Reporter: Wei-Chiu Chuang
> Assignee: Guangxu Cheng
> Priority: Major
> Labels: replication
> Attachments: HBASE-21001.branch-2.0.001.patch,
> HBASE-21001.master.001.patch, HBASE-21001.master.001.patch,
> HBASE-21001.master.002.patch, HBASE-21001.master.003.patch,
> HBASE-21001.master.004.patch
>
>
> ReplicationObserver was added in HBASE-17290 to prevent "Potential loss of
> data for replication of bulk loaded hfiles".
> I tried to enable bulk loading replication feature
> (hbase.replication.bulkload.enabled=true and configure
> hbase.replication.cluster.id) on a HBase 2.0.0 cluster, but the RegionServer
> started with the following error:
> {quote}
> 2018-08-02 18:20:36,365 INFO
> org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost: System
> coprocessor loading is enabled
> 2018-08-02 18:20:36,365 INFO
> org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost: Table
> coprocessor loading is enabled
> 2018-08-02 18:20:36,365 ERROR
> org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost:
> org.apache.hadoop.hbase.replication.regionserver.ReplicationObserver is not
> of type
> RegionServerCoprocessor. Check the configuration of
> hbase.coprocessor.regionserver.classes
> 2018-08-02 18:20:36,366 ERROR
> org.apache.hadoop.hbase.coprocessor.CoprocessorHost: Cannot load coprocessor
> ReplicationObserver
> {quote}
> It looks like this was broken by HBASE-17732 to me, but I could be wrong.
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