[jira] [Resolved] (HBASE-5149) getConfiguration() implementation is misleading

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-5149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell resolved HBASE-5149.
-----------------------------------
    Resolution: Invalid

> getConfiguration() implementation is misleading
> -----------------------------------------------
>
>                 Key: HBASE-5149
>                 URL: https://issues.apache.org/jira/browse/HBASE-5149
>             Project: HBase
>          Issue Type: Improvement
>          Components: master, regionserver
>    Affects Versions: 0.90.1, 0.90.2, 0.90.4
>            Reporter: Mikael Sitruk
>
> The following code will not return the cluster configuration but the local one which is somewhat misleading.
> {code}
> conn = (HConnection) HConnectionManager.getConnection(m_hbConfig); //here the configuration is local
> Configuration conf = conn.getConfiguration()
> conf.getString("hbase.hregion.majorcompaction"); // will return the parameter from the local config instead of the cluster the connection is connected to.
> {code}
> It is suggested that once a connection has been acquired the configuration object should be the one of the cluster.
> As a general observation it is not possible to retrieve the used configuration on the cluster
> It is suggested to add API at {{HRegionServerInterface}}, {{HMasterInterface}} to get the configuration used by the component appropriately (note in 0.90.4 the getConfiguration exist on the Server interface implemented by HRegionServer and HMaster classes) but this interface is not visible/extended by HRegionServerInterface/HMasterInterface, therefore not accessible from client code.
> Also an API like {{HashMap<HserverInfo,Configuration> getClusterConfigurations()}} can be added on the HConnection object.
> Additional notes:
> Since servers can have different properties values (like disk, tmp dir,...) it can be acceptable that the configuration object returned by the connection returns special value to indicate - conflict between value or that multiple values exist.



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