Question

我正试图找出如何处理hbase。我在从Hbase列系列中删除一些列时遇到问题。我创建了一个包含列族的表：

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);
    }
}

在阅读了一些文档之后，我尝试使用以下代码删除列族“zz”中的所有内容：

    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？

Answer 1

Delete delete = new Delete();

行为空 - ＆gt;看看apidocs。删除否为空的构造函数。

Answer 2

我只想澄清一下 - 我能够找到如何从基地删除smth。首先，您需要使用带有column family参数的构造函数创建Delete对象。这是代码，帮助了我：

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);

也许它会帮助别人。

Answer 3

这是来自HBase源代码：

/** Constructor for Writable.  DO NOT USE */
  public Delete() {
    this((byte [])null);
  }

从hbase删除列

3 个答案: