java - 使用java api连接Hbase时卡住

Question

我的本​​地环境:

OS X 10.9.2、Hbase-0.94.17、Java 1.6

我的Hbase模式:独立

我可以在shell中进行操作，但是当我使用java api时，它不起作用。

我的java代码:

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.util.Bytes;


public class MyLittleHBaseClient {
  public static void main(String[] args) throws IOException {

    Configuration config = HBaseConfiguration.create();
    config.addResource("/Users/apple/Documents/tools/hbase-0.94.17/conf/hbase-site.xml");

    HTable table = new HTable(config, "myLittleHBaseTable");

    Put p = new Put(Bytes.toBytes("myLittleRow"));

    p.add(Bytes.toBytes("myLittleFamily"), Bytes.toBytes("someQualifier"),
      Bytes.toBytes("Some Value"));

    table.put(p);

    Get g = new Get(Bytes.toBytes("myLittleRow"));
    Result r = table.get(g);
    byte [] value = r.getValue(Bytes.toBytes("myLittleFamily"),
      Bytes.toBytes("someQualifier"));

    String valueStr = Bytes.toString(value);
    System.out.println("GET: " + valueStr);

    Scan s = new Scan();
    s.addColumn(Bytes.toBytes("myLittleFamily"), Bytes.toBytes("someQualifier"));
    ResultScanner scanner = table.getScanner(s);
    try {

      for (Result rr = scanner.next(); rr != null; rr = scanner.next()) {
        // print out the row we found and the columns we were looking for
        System.out.println("Found row: " + rr);
      }

    } finally {

      scanner.close();
    }
  }
}

这是我的一些 conf 文档:

###########################################hbase-env.sh:

export JAVA_HOME=`/usr/libexec/java_home -v '1.6*'`
export HBASE_OPTS="-XX:+UseConcMarkSweepGC"

###########################################hbase-site.sh:

<configuration>
  <property>
    <name>hbase.rootdir</name>
    <value>file:///Users/apple/Documents/tools/hbase-0.94.17/hbase-rootdir/hbase</value>
  </property>
  <property>
    <name>hbase.zookeeper.property.dataDir</name>
    <value>/Users/apple/Documents/tools/hbase-0.94.17/hbase-zookeeper/zookeeper</value>
  </property>
</configuration>

当我运行上面的 java 代码时，我得到了以下信息:

log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
2014-03-31 13:20:15.037 java[873:1003] Unable to load realm info from SCDynamicStore

然后控制台就停在这里，什么也没有给出。(没有更多的 react )

另外，我在此处附上我的/Users/apple/Documents/tools/hbase-0.94.17/logs/hbase-apple...local.log:

https://docs.google.com/file/d/0BxtBre5A8J61Y2k3SXNtNGs1WXM/edit

感谢您的耐心解答，您的回答对我有很大的帮助:)

Answer 1

在您的配置文件“hbase-env.sh”中:而不是您所拥有的行:
导出 HBASE_OPTS="-XX:+UseConcMarkSweepGC"
添加:
-Djava.security.krb5.realm= -Djava.security.krb5.kdc=
所以该行将是
export HBASE_OPTS="-XX:+UseConcMarkSweepGC -Djava.security.krb5.realm= -Djava.security.krb5.kdc="
在此处查找上下文:Hadoop on OSX "Unable to load realm info from SCDynamicStore"