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Posted to common-dev@hadoop.apache.org by "stack (JIRA)" <ji...@apache.org> on 2007/10/31 19:30:50 UTC
[jira] Created: (HADOOP-2135) [hbase] region 'requests' attribute
is unreliable
[hbase] region 'requests' attribute is unreliable
-------------------------------------------------
Key: HADOOP-2135
URL: https://issues.apache.org/jira/browse/HADOOP-2135
Project: Hadoop
Issue Type: Bug
Components: contrib/hbase
Reporter: stack
Priority: Minor
Watching the hbase webUI, the request counter in the load column reported in the list of regionservers doesn't make sense. Refreshing, the request count will tend to rise for a while as you'd expect but then they'll start to fall and will often drop to zero. This is on regionservers with constant count of regions (I'd expect load to be zero on a new region after a split).
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[jira] Resolved: (HADOOP-2135) [hbase] region 'requests' attribute
is unreliable
Posted by "stack (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-2135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack resolved HADOOP-2135.
---------------------------
Resolution: Won't Fix
Added explaination of requests as part of HADOOP-2074. Resolving as won't fix (since not really broken).
> [hbase] region 'requests' attribute is unreliable
> -------------------------------------------------
>
> Key: HADOOP-2135
> URL: https://issues.apache.org/jira/browse/HADOOP-2135
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Reporter: stack
> Priority: Minor
>
> Watching the hbase webUI, the request counter in the load column reported in the list of regionservers doesn't make sense. Refreshing, the request count will tend to rise for a while as you'd expect but then they'll start to fall and will often drop to zero. This is on regionservers with constant count of regions (I'd expect load to be zero on a new region after a split).
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[jira] Commented: (HADOOP-2135) [hbase] region 'requests' attribute
is unreliable
Posted by "Jim Kellerman (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-2135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12540573 ]
Jim Kellerman commented on HADOOP-2135:
---------------------------------------
Just remember that the number of requests is per heart-beat interval and is not averaged or accumulated in any way.
Depending on when you look, the rate could either be very high or very low.
We need a better way of doing this, when we get more serious about load balancing.
> [hbase] region 'requests' attribute is unreliable
> -------------------------------------------------
>
> Key: HADOOP-2135
> URL: https://issues.apache.org/jira/browse/HADOOP-2135
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Reporter: stack
> Priority: Minor
>
> Watching the hbase webUI, the request counter in the load column reported in the list of regionservers doesn't make sense. Refreshing, the request count will tend to rise for a while as you'd expect but then they'll start to fall and will often drop to zero. This is on regionservers with constant count of regions (I'd expect load to be zero on a new region after a split).
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[jira] Commented: (HADOOP-2135) [hbase] region 'requests' attribute
is unreliable
Posted by "stack (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-2135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12540577 ]
stack commented on HADOOP-2135:
-------------------------------
Let me update the UI so that at least there its explicit that its requests per interval.
> [hbase] region 'requests' attribute is unreliable
> -------------------------------------------------
>
> Key: HADOOP-2135
> URL: https://issues.apache.org/jira/browse/HADOOP-2135
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Reporter: stack
> Priority: Minor
>
> Watching the hbase webUI, the request counter in the load column reported in the list of regionservers doesn't make sense. Refreshing, the request count will tend to rise for a while as you'd expect but then they'll start to fall and will often drop to zero. This is on regionservers with constant count of regions (I'd expect load to be zero on a new region after a split).
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