1

我正在尝试找出如何处理 hbase。我从 Hbase 列族中删除某些列时遇到问题。我创建了一个带有列族的表:

Configuration conf = HBaseConfiguration.create();
HBaseAdmin hbase = new HBaseAdmin(conf);
HTableDescriptor desc = new HTableDescriptor("new_table");
HColumnDescriptor cf = new HColumnDescriptor("zz".getBytes());
desc.addFamily(cf);
hbase.createTable(desc);

然后,我在其中插入了一些数据:

private static void putData(int j) throws IOException {
    for (int i=1; i <= j; i++) {
        String column = "EEE" + i;
        String value = "JJ" + i;
        HTable table = new HTable(conf, "new_table");
        Put p = new Put(Bytes.toBytes("zz"));
        p.add(Bytes.toBytes("zz"), Bytes.toBytes(column),
                  Bytes.toBytes(value));
        table.put(p);
    }
}

在阅读了一些文档后,我尝试使用以下代码从列族“zz”中删除所有内容:

    for (int i=1; i <= 1000; i++) {
        String column = "EEE" + i;
        HTable table = new HTable(conf, "new_table");
        Delete delete = new Delete();
        delete.deleteColumns(Bytes.toBytes("zz"), Bytes.toBytes(column));
        table.delete(delete);
    }

但我得到了例外:

13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.3-1240972, built on 02/06/2012 10:48 GMT
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:host.name=192.168.1.107
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:java.version=1.7.0-ea
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Oracle Corporation
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:java.home=/Library/Java/JavaVirtualMachines/JDK 1.7.0 Developer Preview.jdk/Contents/Home/jre
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/Users/urijvoskresenskij/Documents/workspace/Hbase/bin:/Users/urijvoskresenskij/hbase-0.94.3/lib/activation-1.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/asm-3.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/avro-1.5.3.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/avro-ipc-1.5.3.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-beanutils-1.7.0.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-beanutils-core-1.8.0.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-cli-1.2.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-codec-1.4.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-collections-3.2.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-configuration-1.6.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-digester-1.8.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-el-1.0.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-httpclient-3.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-io-2.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-lang-2.5.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-logging-1.1.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-math-2.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/commons-net-1.4.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/core-3.1.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/guava-11.0.2.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/hadoop-core-1.0.4.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/high-scale-lib-1.1.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/httpclient-4.1.2.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/httpcore-4.1.3.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jackson-core-asl-1.8.8.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jackson-jaxrs-1.8.8.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jackson-mapper-asl-1.8.8.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jackson-xc-1.8.8.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jamon-runtime-2.3.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jasper-compiler-5.5.23.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jasper-runtime-5.5.23.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jaxb-api-2.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jaxb-impl-2.2.3-1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jersey-core-1.8.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jersey-json-1.8.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jersey-server-1.8.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jettison-1.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jetty-6.1.26.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jetty-util-6.1.26.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jruby-complete-1.6.5.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jsp-2.1-6.1.14.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jsp-api-2.1-6.1.14.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/jsr305-1.3.9.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/junit-4.10-HBASE-1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/libthrift-0.8.0.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/log4j-1.2.16.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/metrics-core-2.1.2.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/netty-3.2.4.Final.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/protobuf-java-2.4.0a.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/servlet-api-2.5-6.1.14.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/slf4j-api-1.4.3.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/slf4j-log4j12-1.4.3.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/snappy-java-1.0.3.2.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/stax-api-1.0.1.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/velocity-1.7.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/xmlenc-0.52.jar:/Users/urijvoskresenskij/hbase-0.94.3/lib/zookeeper-3.4.3.jar:/Users/urijvoskresenskij/hbase-0.94.3/hbase-0.94.3-tests.jar:/Users/urijvoskresenskij/hbase-0.94.3/hbase-0.94.3.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.aop-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.asm-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.aspects-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.beans-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.context-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.context.support-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.core-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.expression-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.instrument-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.instrument.tomcat-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.jdbc-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.jms-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.orm-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.oxm-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.test-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.transaction-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.web-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.web.portlet-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.web.servlet-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/dist/org.springframework.web.struts-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Downloads/commons-logging-1.1.1/commons-logging-1.1.1.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.web-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.aop-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.asm-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.aspects-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.beans-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.context-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.context.support-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.core-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.expression-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.instrument-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.instrument.tomcat-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.jdbc-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.jms-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.orm-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.oxm-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.test-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.transaction-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.web.portlet-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.web.servlet-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Desktop/spring-framework-3.1.3.RELEASE/src/org.springframework.web.struts-sources-3.1.3.RELEASE.jar:/Users/urijvoskresenskij/Downloads/commons-logging-1.1.1/commons-logging-1.1.1-javadoc.jar:/Users/urijvoskresenskij/Downloads/commons-logging-1.1.1/commons-logging-1.1.1-sources.jar:/Users/urijvoskresenskij/Downloads/commons-logging-1.1.1/commons-logging-adapters-1.1.1.jar:/Users/urijvoskresenskij/Downloads/commons-logging-1.1.1/commons-logging-api-1.1.1.jar:/Users/urijvoskresenskij/Downloads/commons-logging-1.1.1/commons-logging-tests.jar
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/Users/urijvoskresenskij/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/var/folders/_q/z5blmlxs39d4pmmv1fj9mh500000gn/T/
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:java.compiler=<NA>
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:os.name=Mac OS X
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:os.arch=x86_64
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:os.version=10.7.5
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:user.name=urijvoskresenskij
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:user.home=/Users/urijvoskresenskij
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Client environment:user.dir=/Users/urijvoskresenskij/Documents/workspace/Hbase
13/01/15 15:02:24 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=180000 watcher=hconnection
13/01/15 15:02:24 INFO zookeeper.ClientCnxn: Opening socket connection to server /0:0:0:0:0:0:0:1:2181
13/01/15 15:02:24 INFO zookeeper.RecoverableZooKeeper: The identifier of this process is 11768@MacBook-Air-Urij.local
13/01/15 15:02:24 INFO client.ZooKeeperSaslClient: Client will not SASL-authenticate because the default JAAS configuration section 'Client' could not be found. If you are not using SASL, you may ignore this. On the other hand, if you expected SASL to work, please fix your JAAS configuration.
13/01/15 15:02:24 INFO zookeeper.ClientCnxn: Socket connection established to localhost/0:0:0:0:0:0:0:1:2181, initiating session
13/01/15 15:02:24 INFO zookeeper.ClientCnxn: Session establishment complete on server localhost/0:0:0:0:0:0:0:1:2181, sessionid = 0x13c3c95c6d50004, negotiated timeout = 40000
Exception in thread "main" java.lang.IllegalArgumentException: Row is null
    at org.apache.hadoop.hbase.KeyValue.createByteArray(KeyValue.java:547)
    at org.apache.hadoop.hbase.KeyValue.<init>(KeyValue.java:436)
    at org.apache.hadoop.hbase.KeyValue.<init>(KeyValue.java:405)
    at org.apache.hadoop.hbase.KeyValue.<init>(KeyValue.java:384)
    at org.apache.hadoop.hbase.KeyValue.<init>(KeyValue.java:354)
    at org.apache.hadoop.hbase.client.Delete.deleteColumns(Delete.java:209)
    at org.apache.hadoop.hbase.client.Delete.deleteColumns(Delete.java:192)
    at MainHBase.deleteData(MainHBase.java:74)
    at MainHBase.main(MainHBase.java:85)

也许有人知道如何正确删除数据?

4

3 回答 3

1
Delete delete = new Delete();

Row 为空 --> 查看apidocs。Delete没有空的构造函数。

于 2013-01-15T10:17:57.543 回答
1

我只是想澄清一下 - 我能够找出如何从基础中删除 smth。首先,您需要使用带有列族参数的构造函数来创建 Delete 对象。这是帮助我的代码:

String column = "EEE" + i;
HTable table = new HTable(conf, "new_table");
Delete delete = new Delete(Bytes.toBytes("zz"));
delete.deleteColumns(Bytes.toBytes("zz"), Bytes.toBytes(column));
table.delete(delete);

也许它会帮助某人。

于 2013-01-17T01:06:06.687 回答
0

这是来自 HBase 源代码:

/** Constructor for Writable.  DO NOT USE */
  public Delete() {
    this((byte [])null);
  }
于 2017-05-09T06:15:36.993 回答