错误TableInputFormat:org.Apache.Hadoop.hbase.TableName.valueOf上的Java.lang.NullPointerException
我正在尝试使用Spark从HBase读取数据。我使用的版本是 Spark 1.3.1和Hbase 1.1.1。我得到以下错误错误TableInputFormat:org.Apache.Hadoop.hbase.TableName.valueOf上的Java.lang.NullPointerException,hadoop,apache-spark,hbase,apache-zookeeper,hortonworks-data-platform,Hadoop,Apache Spark,Hbase,Apache Zookeeper,Hortonworks Data Platform,我正在尝试使用Spark从HBase读取数据。我使用的版本是 Spark 1.3.1和Hbase 1.1.1。我得到以下错误 ERROR TableInputFormat: java.lang.NullPointerException at org.apache.hadoop.hbase.TableName.valueOf(TableName.java:417)
ERROR TableInputFormat: java.lang.NullPointerException
at org.apache.hadoop.hbase.TableName.valueOf(TableName.java:417)
at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:159)
at org.apache.hadoop.hbase.mapreduce.TableInputFormat.setConf(TableInputFormat.java:101)
at org.apache.spark.rdd.NewHadoopRDD.getPartitions(NewHadoopRDD.scala:91)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
at scala.Option.getOrElse(Option.scala:120)
at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
at scala.Option.getOrElse(Option.scala:120)
at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
at org.apache.spark.ShuffleDependency.<init>(Dependency.scala:82)
at org.apache.spark.rdd.ShuffledRDD.getDependencies(ShuffledRDD.scala:80)
at org.apache.spark.rdd.RDD$$anonfun$dependencies$2.apply(RDD.scala:206)
at org.apache.spark.rdd.RDD$$anonfun$dependencies$2.apply(RDD.scala:204)
at scala.Option.getOrElse(Option.scala:120)
at org.apache.spark.rdd.RDD.dependencies(RDD.scala:204)
at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$getPreferredLocsInternal(DAGScheduler.scal
错误TableInputFormat:java.lang.NullPointerException
位于org.apache.hadoop.hbase.TableName.valueOf(TableName.java:417)
位于org.apache.hadoop.hbase.client.HTable.(HTable.java:159)
位于org.apache.hadoop.hbase.mapreduce.TableInputFormat.setConf(TableInputFormat.java:101)
位于org.apache.spark.rdd.NewHadoopRDD.getPartitions(NewHadoopRDD.scala:91)
位于org.apache.spark.rdd.rdd$$anonfun$partitions$2.apply(rdd.scala:219)
位于org.apache.spark.rdd.rdd$$anonfun$partitions$2.apply(rdd.scala:217)
在scala.Option.getOrElse(Option.scala:120)
位于org.apache.spark.rdd.rdd.partitions(rdd.scala:217)
位于org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)
位于org.apache.spark.rdd.rdd$$anonfun$partitions$2.apply(rdd.scala:219)
位于org.apache.spark.rdd.rdd$$anonfun$partitions$2.apply(rdd.scala:217)
在scala.Option.getOrElse(Option.scala:120)
位于org.apache.spark.rdd.rdd.partitions(rdd.scala:217)
位于org.apache.spark.shuffledependence(Dependency.scala:82)
位于org.apache.spark.rdd.shuffleddd.getDependencies(shuffleddd.scala:80)
位于org.apache.spark.rdd.rdd$$anonfun$dependencies$2.apply(rdd.scala:206)
位于org.apache.spark.rdd.rdd$$anonfun$dependencies$2.apply(rdd.scala:204)
在scala.Option.getOrElse(Option.scala:120)
位于org.apache.spark.rdd.rdd.dependencies(rdd.scala:204)
在org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$getPreferredLocsInternal(DAGScheduler.scal
代码如下
public static void main( String[] args )
{
String TABLE_NAME = "Hello";
HTable table=null;
SparkConf sparkConf = new SparkConf();
sparkConf.setAppName("Data Reader").setMaster("local[1]");
sparkConf.set("spark.executor.extraClassPath", "$(hbase classpath)");
JavaSparkContext sparkContext = new JavaSparkContext(sparkConf);
Configuration hbConf = HBaseConfiguration.create();
hbConf.set("zookeeper.znode.parent", "/hbase-unsecure");
try {
table = new HTable(hbConf, Bytes.toBytes(TABLE_NAME));
} catch (IOException e) {
e.printStackTrace();
}
JavaPairRDD<ImmutableBytesWritable, Result> hBaseRDD = sparkContext
.newAPIHadoopRDD(
hbConf,
TableInputFormat.class,
org.apache.hadoop.hbase.io.ImmutableBytesWritable.class,
org.apache.hadoop.hbase.client.Result.class);
hBaseRDD.coalesce(1, true);
System.out.println("Count "+hBaseRDD.count());
//.saveAsTextFile("hBaseRDD");
try {
table.close();
sparkContext.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
publicstaticvoidmain(字符串[]args)
{
字符串表_NAME=“Hello”;
HTable table=null;
SparkConf SparkConf=新SparkConf();
sparkConf.setAppName(“数据读取器”).setMaster(“本地[1]”);
sparkConf.set(“spark.executor.extraClassPath”,“$(hbase类路径)”);
JavaSparkContext sparkContext=新的JavaSparkContext(sparkConf);
Configuration hbConf=HBaseConfiguration.create();
hbConf.set(“zookeeper.znode.parent”,“/hbase unsecure”);
试一试{
table=新的HTable(hbConf,Bytes.toBytes(table_NAME));
}捕获(IOE异常){
e、 printStackTrace();
}
javapairdd hBaseRDD=sparkContext
.newAPIHadoopRDD(
hbConf,
TableInputFormat.class,
org.apache.hadoop.hbase.io.ImmutableBytesWritable.class,
org.apache.hadoop.hbase.client.Result.class);
hBaseRDD.coalesce(1,真);
System.out.println(“Count”+hBaseRDD.Count());
//.saveAsTextFile(“hBaseRDD”);
试一试{
table.close();
sparkContext.close();
}捕获(IOE异常){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
}
我无法解决此问题。我正在为此使用Hortonworks沙盒。您已写入:
try {
table = new HTable(hbConf, Bytes.toBytes(TABLE_NAME));
} catch (IOException e) {
e.printStackTrace();
}
如果您使用的是1.1.1 api:
在中,我只能看到两个构造函数:
受保护的HTable(群集连接连接,BufferedMutatorParams参数)
用于内部测试
受保护的HTable(TableName TableName、ClusterConnection连接、,
TableConfiguration tableConfig,RpcRetryingCallerFactory
rpcCallerFactory、RpcControllerFactory、RpcControllerFactory、,
Executor服务池)创建一个对象以访问HBase表
第一个构造函数的参数构造函数是:BufferedMutatorParams(TableName TableName)
TableName没有构造函数
因此,您必须按如下方式初始化HTable:
table = new HTable(hbConf, new bufferedMutatorParams(TableName.valueOf(TABLE_NAME))
如果您正在使用:
HTBale的施工人员包括:
HTable(byte[]tableName,HConnection connection)创建一个要
访问HBase表.HTable(字节[]表名,HConnection连接,
ExecutorService池)创建一个对象以访问HBase表
HTable(org.apache.hadoop.conf.conf,字节[]tableName)
创建用于访问HBase表的对象
HTable(org.apache.hadoop.conf.conf,byte[]tableName,
Executor服务池)创建一个对象以访问HBase表
HTable(org.apache.hadoop.conf.conf.conf,String tableName)
创建用于访问HBase表的对象
因此,最后看一下,您只需要传递字符串名称,而不需要传递字节[]
table = new HTable(hbConf, TABLE_NAME);
应该没问题。发布您的代码please@SimonePessotto请检查您正在使用的java API的已编辑postwich版本?