[英]Exception :org.apache.hadoop.hbase.masternotrunningexception
[英]HBase Java Client does not work (MasterNotRunningException exception )
我正在嘗試使用Java編寫遠程HBase客戶端。 以下是供參考的代碼:
package ttumdt.app.connector;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
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.filter.BinaryComparator;
import org.apache.hadoop.hbase.filter.CompareFilter;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.RowFilter;
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;
import org.apache.hadoop.hbase.util.Bytes;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class HBaseClusterConnector {
private final String MASTER_IP = "10.138.168.185";
private final String ZOOKEEPER_PORT = "2181";
final String TRAFFIC_INFO_TABLE_NAME = "TrafficLog";
final String TRAFFIC_INFO_COLUMN_FAMILY = "TimeStampIMSI";
final String KEY_TRAFFIC_INFO_TABLE_BTS_ID = "BTS_ID";
final String KEY_TRAFFIC_INFO_TABLE_DATE = "DATE";
final String COLUMN_IMSI = "IMSI";
final String COLUMN_TIMESTAMP = "TIME_STAMP";
private final byte[] columnFamily = Bytes.toBytes(TRAFFIC_INFO_COLUMN_FAMILY);
private final byte[] qualifier= Bytes.toBytes(COLUMN_IMSI);
private Configuration conf = null;
public HBaseClusterConnector () throws MasterNotRunningException, ZooKeeperConnectionException {
conf = HBaseConfiguration.create();
conf.set("hbase.zookeeper.quorum",MASTER_IP);
conf.set("hbase.zookeeper.property.clientPort",ZOOKEEPER_PORT);
HBaseAdmin.checkHBaseAvailable(conf);
}
/**
* This filter will return list of IMSIs for a given btsId and ime interval
* @param btsId : btsId for which the query has to run
* @param startTime : start time for which the query has to run
* @param endTime : end time for which the query has to run
* @return returns IMSIs as set of Strings
* @throws IOException
*/
public Set<String> getInfoPerBTSID(String btsId, String date,
String startTime, String endTime)
throws IOException {
Set<String> imsis = new HashSet<String>();
//ToDo : better exception handling
HTable table = new HTable(conf, TRAFFIC_INFO_TABLE_NAME);
Scan scan = new Scan();
scan.addColumn(columnFamily,qualifier);
scan.setFilter(prepFilter(btsId, date, startTime, endTime));
// filter to build where timestamp
Result result = null;
ResultScanner resultScanner = table.getScanner(scan);
while ((result = resultScanner.next())!= null) {
byte[] obtainedColumn = result.getValue(columnFamily,qualifier);
imsis.add(Bytes.toString(obtainedColumn));
}
resultScanner.close();
return imsis;
}
//ToDo : Figure out how valid is this filter code?? How comparison happens
// with eqaul or grater than equal etc
private Filter prepFilter (String btsId, String date,
String startTime, String endTime)
{
byte[] tableKey = Bytes.toBytes(KEY_TRAFFIC_INFO_TABLE_BTS_ID);
byte[] timeStamp = Bytes.toBytes(COLUMN_TIMESTAMP);
// filter to build -> where BTS_ID = <<btsId>> and Date = <<date>>
RowFilter keyFilter = new RowFilter(CompareFilter.CompareOp.EQUAL,
new BinaryComparator(Bytes.toBytes(btsId+date)));
// filter to build -> where timeStamp >= startTime
SingleColumnValueFilter singleColumnValueFilterStartTime =
new SingleColumnValueFilter(columnFamily, timeStamp,
CompareFilter.CompareOp.GREATER_OR_EQUAL,Bytes.toBytes(startTime));
// filter to build -> where timeStamp <= endTime
SingleColumnValueFilter singleColumnValueFilterEndTime =
new SingleColumnValueFilter(columnFamily, timeStamp,
CompareFilter.CompareOp.LESS_OR_EQUAL,Bytes.toBytes(endTime));
FilterList filterList = new FilterList(FilterList.Operator.MUST_PASS_ALL, Arrays
.asList((Filter) keyFilter,
singleColumnValueFilterStartTime, singleColumnValueFilterEndTime));
return filterList;
}
public static void main(String[] args) throws IOException {
HBaseClusterConnector flt = new HBaseClusterConnector();
Set<String> imsis= flt.getInfoPerBTSID("AMCD000784", "26082013","104092","104095");
System.out.println(imsis.toString());
}
}
我目前正在使用Cloudera快速啟動VM來測試它。
問題是; 如果我在VM上運行這個代碼它工作得非常好。 但如果它從外部運行,則失敗並出現以下錯誤。 而且我懷疑它與VM設置有關,而不是其他任何事情。 請注意,我已經檢查過是否可以從主機連接到VM的節點管理器/作業跟蹤器,它工作正常。 當我從主機操作系統運行代碼而不是在VM上運行代碼時; 我得到以下錯誤:
2013-10-15 18:16:04.185 java[652:1903] Unable to load realm info from SCDynamicStore
Exception in thread "main" org.apache.hadoop.hbase.MasterNotRunningException: Retried 1 times
at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:138)
at org.apache.hadoop.hbase.client.HBaseAdmin.checkHBaseAvailable(HBaseAdmin.java:1774)
at ttumdt.app.connector.HBaseClusterConnector.<init>(HBaseClusterConnector.java:47)
at ttumdt.app.connector.HBaseClusterConnector.main(HBaseClusterConnector.java:117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Process finished with exit code 1
請注意; 主節點實際上正在運行。 zookeper日志顯示它已與主機操作系統建立連接:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
6:16:03.274 PM INFO org.apache.zookeeper.server.ZooKeeperServer
Client attempting to establish new session at /10.138.169.81:50567
6:16:03.314 PM INFO org.apache.zookeeper.server.ZooKeeperServer
Established session 0x141bc2487440004 with negotiated timeout 60000 for client /10.138.169.81:50567
6:16:03.964 PM INFO org.apache.zookeeper.server.PrepRequestProcessor
Processed session termination for sessionid: 0x141bc2487440004
6:16:03.996 PM INFO org.apache.zookeeper.server.NIOServerCnxn
Closed socket connection for client /10.138.169.81:50567 which had sessionid 0x141bc2487440004
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
但是我在Master或RegionServer日志中看不到任何活動的痕跡。
請注意,我的主機操作系統是Mac OSX 10.7.5
根據可用資源; 這應該工作正常; 雖然有人建議簡單的HBase java客戶端永遠不會工作。 我糊塗了; 並急切地等待指針! 請回復
HBase Java客戶端當然可以工作!
最可能的解釋是,您的客戶端由於某種原因無法看到主服務器正在運行的計算機。
一種可能的解釋是,雖然您使用IP地址連接到Zookeeper,但HBase客戶端嘗試使用其主機名連接到主服務器。
因此,如果您確保主機文件(在客戶端上)中的條目與運行主服務器的計算機的主機名匹配,則可以解決該問題。
檢查是否可以從客戶端計算機訪問<hostname>:60010上的主Web UI。
在不同的端口啟動你的hiveserver2,然后嘗試連接
命令將hiveserver2連接到不同的端口(確保配置單元位於路徑中):
hive --service hiveserver2 --hiveconf hive.server2.thrift.port=13000
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