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From "huaxiang sun (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-18035) Meta replica does not give any primaryOperationTimeout to primary meta region
Date Tue, 23 May 2017 17:52:04 GMT

     [ https://issues.apache.org/jira/browse/HBASE-18035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

huaxiang sun updated HBASE-18035:
---------------------------------
    Release Note: When a client is configured to use meta replica, it sends scan request to
all meta replicas almost at the same time. Since meta replica contains stale data, if result
from one of replica comes back first, the client may get wrong region locations. To fix this,
"hbase.client.meta.replica.scan.timeout" is introduced, a client will always send to primary
meta region first, wait the configured timeout for reply. If no result is received, it will
send request to replica meta regions. The unit for "hbase.client.meta.replica.scan.timeout"
 is microsecond, the default value is 1000000 (1 second).

> Meta replica does not give any primaryOperationTimeout to primary meta region
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-18035
>                 URL: https://issues.apache.org/jira/browse/HBASE-18035
>             Project: HBase
>          Issue Type: Bug
>            Reporter: huaxiang sun
>            Assignee: huaxiang sun
>            Priority: Critical
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: 18035-branch-1-v001.patch, 18035.branch-1.v001.patch, 18035-unittest.patch,
HBASE-18035-branch-1-v001.patch, HBASE-18035-master-v001.patch, HBASE-18035-master-v001.patch,
HBASE-18035-master-v002.patch
>
>
> I was working on my unittest and it failed with TableNotFoundException. I debugged a
bit and found out that for meta scan, it does not give any primaryOperationTimeout to primary
meta region. This will be an issue as the meta replica will contain stale data and it is possible
that the meta replica will return back first than primary.
> https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java#L823



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