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https://issues.apache.org/jira/browse/HBASE-3134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13235013#comment-13235013
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Jean-Daniel Cryans commented on HBASE-3134:
-------------------------------------------
I found one corner case:
# start replication with a peer
# insert some data
# kill the peer
# disable replication
# start the peer
The issue is that when the peer is restarted the region servers will be able to
replicate the batch they are currently trying to send. Here's the log:
{noformat}
2012-03-21 20:40:14,775 INFO
org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Slave
cluster looks down: Failed setting up proxy interface
org.apache.hadoop.hbase.ipc.HRegionInterface to sv4r9s44/10.4.9.44:62023 after
attempts=1
2012-03-21 20:40:15,774 DEBUG
org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Since we
are unable to replicate, sleeping 1000 times 9
2012-03-21 20:40:24,786 DEBUG
org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Replicating
149
2012-03-21 20:40:30,826 INFO
org.apache.hadoop.hbase.replication.regionserver.ReplicationSourceManager:
Going to report log #sv4r8s38%2C62023%2C1332361576338.1332361577015 for
position 303630357 in
hdfs://sv4r11s38:9100/hbase/.logs/sv4r8s38,62023,1332361576338/sv4r8s38%2C62023%2C1332361576338.1332361577015
2012-03-21 20:40:30,830 DEBUG
org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Replicated
in total: 149
2012-03-21 20:40:30,830 DEBUG
org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Replication
is disabled, sleeping 1000 times 1
{noformat}
Right now {{shipEdits}} won't let you throw an {{Exception}} as it catches
everything, so we could change that or we could change the loop at the end of
the method to stay in there until replication is re-enabled (at which point the
edits will be sent directly). I'm also opened to other suggestions.
Another thing I saw is that both {{enable_peer}} and {{disable_peer}} in the
shell still show "CURRENTLY UNSUPPORTED" in their help.
I'm sorry it took me so long to get to this jira.
> [replication] Add the ability to enable/disable streams
> -------------------------------------------------------
>
> Key: HBASE-3134
> URL: https://issues.apache.org/jira/browse/HBASE-3134
> Project: HBase
> Issue Type: New Feature
> Components: replication
> Reporter: Jean-Daniel Cryans
> Assignee: Teruyoshi Zenmyo
> Priority: Minor
> Labels: replication
> Fix For: 0.94.0
>
> Attachments: 3134-v2.txt, 3134-v3.txt, 3134.txt, HBASE-3134.patch,
> HBASE-3134.patch, HBASE-3134.patch, HBASE-3134.patch
>
>
> This jira was initially in the scope of HBASE-2201, but was pushed out since
> it has low value compared to the required effort (and when want to ship
> 0.90.0 rather soonish).
> We need to design a way to enable/disable replication streams in a
> determinate fashion.
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