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我正在使用 Apache Hudi 将非分区表写入 AWS S3 并将其同步到配置单元。这是DataSourceWriteOptions正在使用的。

val hudiOptions: Map[String, String] = Map[String, String](
      DataSourceWriteOptions.TABLE_TYPE_OPT_KEY -> "MERGE_ON_READ",
      DataSourceWriteOptions.RECORDKEY_FIELD_OPT_KEY -> "PERSON_ID",
      DataSourceWriteOptions.PARTITIONPATH_FIELD_OPT_KEY -> "",
      DataSourceWriteOptions.PRECOMBINE_FIELD_OPT_KEY -> "UPDATED_DATE",
      DataSourceWriteOptions.HIVE_PARTITION_FIELDS_OPT_KEY -> "",
      DataSourceWriteOptions.HIVE_PARTITION_EXTRACTOR_CLASS_OPT_KEY -> classOf[NonPartitionedExtractor].getName,
      DataSourceWriteOptions.HIVE_STYLE_PARTITIONING_OPT_KEY -> "true",
      DataSourceWriteOptions.KEYGENERATOR_CLASS_OPT_KEY -> "org.apache.hudi.keygen.NonpartitionedKeyGenerator"
    )

如果分区表正在成功写入，但如果我尝试写入非分区表，则会出错。这是错误输出片段

Caused by: java.lang.NullPointerException
        at org.apache.hudi.hadoop.utils.HoodieInputFormatUtils.getTableMetaClientForBasePath(HoodieInputFormatUtils.java:283)
        at org.apache.hudi.hadoop.InputPathHandler.parseInputPaths(InputPathHandler.java:100)
        at org.apache.hudi.hadoop.InputPathHandler.<init>(InputPathHandler.java:60)
        at org.apache.hudi.hadoop.HoodieParquetInputFormat.listStatus(HoodieParquetInputFormat.java:81)
        at org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:288)
        at org.apache.spark.rdd.HadoopRDD.getPartitions(HadoopRDD.scala:204)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:273)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:269)
        at scala.Option.getOrElse(Option.scala:121)
        at org.apache.spark.rdd.RDD.partitions(RDD.scala:269)
        at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:49)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:273)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:269)
        at scala.Option.getOrElse(Option.scala:121)
        at org.apache.spark.rdd.RDD.partitions(RDD.scala:269)
        at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:49)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:273)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:269)
        at scala.Option.getOrElse(Option.scala:121)
        at org.apache.spark.rdd.RDD.partitions(RDD.scala:269)
        at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:49)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:273)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:269)
        at scala.Option.getOrElse(Option.scala:121)
        at org.apache.spark.rdd.RDD.partitions(RDD.scala:269)
        at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:49)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:273)
        at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:269)
        at scala.Option.getOrElse(Option.scala:121)
        at org.apache.spark.rdd.RDD.partitions(RDD.scala:269)
        at org.apache.spark.rdd.RDD.getNumPartitions(RDD.scala:289)
        at org.apache.spark.sql.execution.exchange.ShuffleExchangeExec.mapOutputStatisticsFuture$lzycompute(ShuffleExchangeExec.scala:83)
        at org.apache.spark.sql.execution.exchange.ShuffleExchangeExec.mapOutputStatisticsFuture(ShuffleExchangeExec.scala:82)
        at org.apache.spark.sql.execution.adaptive.ShuffleQueryStageExec.cancel(QueryStageExec.scala:152)
        at org.apache.spark.sql.execution.adaptive.MaterializeExecutable.cancel(AdaptiveExecutable.scala:357)
        at org.apache.spark.sql.execution.adaptive.AdaptiveExecutorRuntime.fail(AdaptiveExecutor.scala:280)
        ... 41 more

这是代码HoodieInputFormatUtils.getTableMetaClientForBasePath()

/**
   * Extract HoodieTableMetaClient from a partition path(not base path).
   * @param fs
   * @param dataPath
   * @return
   * @throws IOException
   */
  public static HoodieTableMetaClient getTableMetaClientForBasePath(FileSystem fs, Path dataPath) throws IOException {
    int levels = HoodieHiveUtils.DEFAULT_LEVELS_TO_BASEPATH;
    if (HoodiePartitionMetadata.hasPartitionMetadata(fs, dataPath)) {
      HoodiePartitionMetadata metadata = new HoodiePartitionMetadata(fs, dataPath);
      metadata.readFromFS();
      levels = metadata.getPartitionDepth();
    }
    Path baseDir = HoodieHiveUtils.getNthParent(dataPath, levels);
    LOG.info("Reading hoodie metadata from path " + baseDir.toString());
    return new HoodieTableMetaClient(fs.getConf(), baseDir.toString());
  }

第 283 行LOG.info()是导致 NullPointerException 的原因。所以看起来为分区提供的配置值已经搞砸了。此代码正在 AWS EMR 上运行。

Release label:emr-5.30.1
Hadoop distribution:Amazon 2.8.5
Applications:Hive 2.3.6, Spark 2.4.5
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