我在试用hbase spark分布式扫描示例。
我的简单代码如下所示：

public class DistributedHBaseScanToRddDemo {

    public static void main(String[] args) {
        JavaSparkContext jsc = getJavaSparkContext("hbasetable1");
        Configuration hbaseConf = getHbaseConf(0, "", "");
        JavaHBaseContext javaHbaseContext = new JavaHBaseContext(jsc, hbaseConf);

        Scan scan = new Scan();
        scan.setCaching(100);

        JavaRDD<Tuple2<ImmutableBytesWritable, Result>> javaRdd =
                  javaHbaseContext.hbaseRDD(TableName.valueOf("hbasetable1"), scan);

        List<String> results = javaRdd.map(new ScanConvertFunction()).collect();
        System.out.println("Result Size: " + results.size());
    }

    public static Configuration getHbaseConf(int pRimeout, String pQuorumIP, String pClientPort)
    {
        Configuration hbaseConf = HBaseConfiguration.create();
        hbaseConf.setInt("timeout", 120000); 
        hbaseConf.set("hbase.zookeeper.quorum", "10.56.36.14"); 
        hbaseConf.set("hbase.zookeeper.property.clientPort", "2181");
        return hbaseConf;
    }

    public static JavaSparkContext getJavaSparkContext(String pTableName)
    {
        SparkConf sparkConf = new SparkConf().setAppName("JavaHBaseBulkPut" + pTableName);
        sparkConf.setMaster("local");
        sparkConf.set("spark.testing.memory", "471859200");
        JavaSparkContext jsc = new JavaSparkContext(sparkConf);

        return jsc;
    }

    private static class ScanConvertFunction implements Function<Tuple2<ImmutableBytesWritable, Result>, String> {
        public String call(Tuple2<ImmutableBytesWritable, Result> v1) throws Exception {
            return Bytes.toString(v1._1().copyBytes());
        }
    }
}

我得到以下例外：

Exception in thread "main" org.apache.hadoop.hbase.DoNotRetryIOException: /10.56.48.219:16020 is unable to read call parameter from client 10.56.49.148; java.lang.UnsupportedOperationException: GetRegionLoad
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.apache.hadoop.hbase.ipc.RemoteWithExtrasException.instantiateException(RemoteWithExtrasException.java:93)
    at org.apache.hadoop.hbase.ipc.RemoteWithExtrasException.unwrapRemoteException(RemoteWithExtrasException.java:83)
    at org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.makeIOExceptionOfException(ProtobufUtil.java:368)
    at org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.getRemoteException(ProtobufUtil.java:345)
    at org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.getRegionLoad(ProtobufUtil.java:1746)
    at org.apache.hadoop.hbase.client.HBaseAdmin.getRegionLoad(HBaseAdmin.java:2089)
    at org.apache.hadoop.hbase.mapreduce.RegionSizeCalculator.init(RegionSizeCalculator.java:82)
    at org.apache.hadoop.hbase.mapreduce.RegionSizeCalculator.<init>(RegionSizeCalculator.java:60)
    at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.oneInputSplitPerRegion(TableInputFormatBase.java:293)
    at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.getSplits(TableInputFormatBase.java:257)
    at org.apache.hadoop.hbase.mapreduce.TableInputFormat.getSplits(TableInputFormat.java:254)
    at org.apache.spark.rdd.NewHadoopRDD.getPartitions(NewHadoopRDD.scala:121)
    at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:248)
    at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:246)
    at scala.Option.getOrElse(Option.scala:121)
    at org.apache.spark.rdd.RDD.partitions(RDD.scala:246)
    at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:35)
    at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:248)
    at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:246)
    at scala.Option.getOrElse(Option.scala:121)
    at org.apache.spark.rdd.RDD.partitions(RDD.scala:246)
    at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:35)
    at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:248)
    at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:246)
    at scala.Option.getOrElse(Option.scala:121)
    at org.apache.spark.rdd.RDD.partitions(RDD.scala:246)
    at org.apache.spark.SparkContext.runJob(SparkContext.scala:1911)
    at org.apache.spark.rdd.RDD$$anonfun$collect$1.apply(RDD.scala:893)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
    at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
    at org.apache.spark.rdd.RDD.collect(RDD.scala:892)
    at org.apache.spark.api.java.JavaRDDLike$class.collect(JavaRDDLike.scala:360)
    at org.apache.spark.api.java.AbstractJavaRDDLike.collect(JavaRDDLike.scala:45)
    at com.myproj.poc.sparkhbaseneo4j.DistributedHBaseScanToRddDemo.main(DistributedHBaseScanToRddDemo.java:32)
Caused by: org.apache.hadoop.hbase.ipc.RemoteWithExtrasException(org.apache.hadoop.hbase.DoNotRetryIOException): /10.56.48.219:16020 is unable to read call parameter from client 10.56.49.148; java.lang.UnsupportedOperationException: GetRegionLoad
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient.onCallFinished(AbstractRpcClient.java:387)
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient.access$100(AbstractRpcClient.java:95)
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:410)
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:406)
    at org.apache.hadoop.hbase.ipc.Call.callComplete(Call.java:103)
    at org.apache.hadoop.hbase.ipc.Call.setException(Call.java:118)
    at org.apache.hadoop.hbase.ipc.NettyRpcDuplexHandler.readResponse(NettyRpcDuplexHandler.java:161)
    at org.apache.hadoop.hbase.ipc.NettyRpcDuplexHandler.channelRead(NettyRpcDuplexHandler.java:191)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
    at org.apache.hadoop.hbase.shaded.io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
    at org.apache.hadoop.hbase.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
    at org.apache.hadoop.hbase.shaded.io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:287)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:579)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:496)
    at org.apache.hadoop.hbase.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458)
    at org.apache.hadoop.hbase.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
    at org.apache.hadoop.hbase.shaded.io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)
    at java.lang.Thread.run(Thread.java:745)

我还尝试了批量get和put示例，它们工作正常。所以我猜批量扫描的例子出了什么问题。

1条答案

按热度按时间

fwzugrvs1#

cloudera hbase spark连接器似乎可以工作：
https://mvnrepository.com/artifact/org.apache.hbase/hbase-spark?repo=cloudera
因此，在pom.xml中添加如下内容：

<repositories>
    <repository>
      <id>cloudera</id>
      <name>cloudera</name>
      <url>https://repository.cloudera.com/content/repositories/releases/</url>
    </repository>
  </repositories>

对于依赖项：

<dependency>
      <groupId>org.apache.hbase</groupId>
      <artifactId>hbase-spark</artifactId>
      <version>${hbase-spark.version}</version>
    </dependency>

我注意到的一点是，这个功能似乎不能很好地重用hbase连接，并试图为每个分区重新建立它。请看我的问题和相关讨论：
hbase spark连接器：是否为每次扫描建立与hbase的连接？
出于这个原因，我实际上避免使用这个功能，但很想知道您的使用经验。

赞(0）回复(0）举报 2021-06-02

执行hbase扫描时出现异常

1条答案

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