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From "Qiang Tian (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11518) doc update for how to create non-shared HConnection
Date Wed, 16 Jul 2014 02:14:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14063005#comment-14063005
] 

Qiang Tian commented on HBASE-11518:
------------------------------------

the change was made in 2011...please see discussion on HBASE-3777.  in short, it looks the
old method could have various issues.



> doc update for how to create non-shared HConnection
> ---------------------------------------------------
>
>                 Key: HBASE-11518
>                 URL: https://issues.apache.org/jira/browse/HBASE-11518
>             Project: HBase
>          Issue Type: Bug
>          Components: documentation
>    Affects Versions: 0.94.21, 0.98.4
>            Reporter: Qiang Tian
>            Assignee: Qiang Tian
>            Priority: Minor
>         Attachments: hbase-11518-master.patch
>
>
> creation for non-shared connections has changed since hbase-3777, but the doc still remains
the same...
> a simple test program:
> public class testHbase2{
>         public static void main(String[] args) throws Exception {
>                 Configuration conf = HBaseConfiguration.create();
>                 conf.set("hbase.zookeeper.quorum","localhost");
>                 conf.set("hbase.zookeeper.property.clientPort", "2181");
>                 conf.set("hbase.client.instance.id", "2");
>                 HBaseAdmin admin = new HBaseAdmin(conf);
>                 conf.set("hbase.client.instance.id", "3");
>                 HBaseAdmin admin2 = new HBaseAdmin(conf);
>         }
> }
>   public static HConnection getConnection(final Configuration conf)
>   throws IOException {
>     HConnectionKey connectionKey = new HConnectionKey(conf);
>     LOG.info("###create new connectionkey: " + connectionKey);
>     synchronized (CONNECTION_INSTANCES) {
> 14/07/15 18:06:08 INFO client.HConnectionManager: ###create new connectionkey: HConnectionKey{properties={hbase.rpc.timeout=600000,
hbase.client.instance.id=2, hbase.zookeeper.quorum=localhost, hbase.client.pause=100, hbase.zookeeper.property.clientPort=2181,
zookeeper.znode.parent=/hbase, hbase.client.retries.number=35}, username='tianq'}
> 14/07/15 18:06:08 INFO client.HConnectionManager: ###create new connection###
> 14/07/15 18:06:08 INFO zookeeper.RecoverableZooKeeper: Process identifier=hconnection-0x3d7c3d7c
connecting to ZooKeeper ensemble=localhost:2181
> 14/07/15 18:06:09 INFO client.HConnectionManager: ###create new connectionkey: HConnectionKey{properties={hbase.rpc.timeout=600000,
hbase.client.instance.id=3, hbase.zookeeper.quorum=localhost, hbase.client.pause=100, hbase.zookeeper.property.clientPort=2181,
zookeeper.znode.parent=/hbase, hbase.client.retries.number=35}, username='tianq'}
> 14/07/15 18:06:09 INFO client.HConnectionManager: ###create new connection###
> 14/07/15 18:06:09 INFO zookeeper.RecoverableZooKeeper: Process identifier=hconnection-0xd460d46
connecting to ZooKeeper ensemble=localhost:2181



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