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From "Ding,Dongchao" <dingdongc...@baidu.com>
Subject Re: Connecting to hbase 1.0.3 via java client stuck at zookeeper.ClientCnxn: Session establishment complete on server
Date Wed, 06 Apr 2016 03:57:54 GMT

1、 Is your zk-path 127.0.0.1:2181 ?  This is default configuration without
config file.

2、Set a cache value (100 or 1000 and so on ) for scan object.


在 16/4/4 01:06, "Sachin Mittal" <sjmittal@gmail.com> 写入:

>I am stuck on connecting to hbase 1.0.3 via simple java client.
>The program hangs at:
>
>    [main] zookeeper.ZooKeeper: Initiating client connection,
>connectString=
>127.0.0.1:2181 sessionTimeout=90000 watcher=hconnection-0x1e67b8720x0,
>quorum=127.0.0.1:2181, baseZNode=/hbaseenter code here
>    [main-SendThread(127.0.0.1:2181)] zookeeper.ClientCnxn: Opening socket
>connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to
>authenticate using SASL (unknown error)
>    [main-SendThread(127.0.0.1:2181)] zookeeper.ClientCnxn: Socket
>connection established to 127.0.0.1/127.0.0.1:2181, initiating session
>    [main-SendThread(127.0.0.1:2181)] zookeeper.ClientCnxn: Session
>establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid =
>0x153d8383c530008, negotiated timeout = 40000
>
>The code is very simple and standard:
>
>      public static void main(String args[]) throws IOException{
>        // Instantiating Configuration class
>        Configuration config = HBaseConfiguration.create();
>        Connection connection =
>ConnectionFactory.createConnection(config);
>          // Instantiating Table class
>        Table  table =
>connection.getTable(TableName.valueOf(HBaseTables.APPLICATION_TRACE_INDEX)
>);
>       // Instantiating the Scan class
>        Scan scan = new Scan();
>         // Getting the scan result
>        ResultScanner scanner = table.getScanner(scan);
>        // Reading values from scan result
>        for (Result result = scanner.next(); result != null; result =
>scanner.next()) {
>            System.out.println("Found row : " + result);
>        }
>        //closing the scanner
>        scanner.close();
>        table.close();
>        connection.close();
>     }
>
>
>The jars I am using are:
>
>    commons-collections-3.2.1.jar
>    commons-configuration-1.6.jar
>    commons-lang-2.6.jar
>    commons-logging-1.2.jar
>    guava-12.0.1.jar
>    hadoop-auth-2.5.1.jar
>    hadoop-client-2.5.1.jar
>    hadoop-common-2.5.1.jar
>    hbase-client-1.0.3.jar
>    hbase-common-1.0.3.jar
>    hbase-hadoop-compat-1.0.3.jar
>    hbase-hadoop2-compat-1.0.3.jar
>    hbase-it-1.0.3.jar
>    hbase-protocol-1.0.3.jar
>    hbase-resource-bundle-1.0.3.jar
>    hbase-rest-1.0.3.jar
>    htrace-core-3.0.4.jar
>    htrace-core-3.1.0-incubating.jar
>    log4j-1.2.17.jar
>    netty-3.2.4.Final.jar
>    netty-all-4.0.23.Final.jar
>    protobuf-java-2.5.0.jar
>    slf4j-api-1.7.7.jar
>    slf4j-log4j12-1.7.7.jar
>    zookeeper-3.4.6.jar
>
>My hbase-site.xml is
>
>    <configuration>
>      <property>
>        <name>hbase.rootdir</name>
>        <value>file:///path/to/data/hbase</value>
>      </property>
>      <property>
>        <name>hbase.zookeeper.property.dataDir</name>
>        <value>file:///path/to/data/zookeeper</value>
>      </property>
>      <property>
>        <name>hbase.zookeeper.quorum</name>
>        <value>127.0.0.1</value>
>      </property>
>    </configuration>
>
>In my hosts I have this entry:
>127.0.0.1       localhost.localdomain localhost Sachin-PC
>
>Also in hbase regionservers has one entry
>localhost
>
>I have tried many options for hbase.zookeeper.quorum like localhost,
>Sachin-PC, 127.0.0.1 but none have worked.
>
>Also note the jars I am using are of same version in hbase lib.
>
>I am just not able to wrap my head around as what is causing the failure
>to
>scan table for this simple code.
>
>Note the code stops at line ResultScanner scanner =
>table.getScanner(scan);
>So connection is happening but it is not getting any data.
>
>Also note I am able to run hbase and connect to it via shell and scan
>tables all fine.
>
>Please help!
>
>Thanks
>Sachin
>
>ps additional logs:
>
>    DEBUG [hconnection-0x1e67b872-shared--pool1-t1] ipc.AbstractRpcClient:
>Use SIMPLE authentication for service ClientService, sasl=false
>    DEBUG [hconnection-0x1e67b872-shared--pool1-t1] ipc.AbstractRpcClient:
>Connecting to Sachin-PC/127.0.0.1:55161
>
>    DEBUG [hconnection-0x1e67b872-shared--pool1-t1] ipc.AbstractRpcClient:
>Use SIMPLE authentication for service ClientService, sasl=false
>    DEBUG [hconnection-0x1e67b872-shared--pool1-t1] ipc.AbstractRpcClient:
>Not trying to connect to Sachin-PC/127.0.0.1:55161 this server is in the
>failed servers list


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