使用 Tez 在 Azure HDInsight 上的 Hive 上重新生成索引失败



我尝试在启用 Tez 的情况下在 Azure HDInsight 上的 Hive 上创建索引。我可以成功创建索引,但无法重建它们:作业失败,输出如下:

Map 1: -/-  Reducer 2: 0/1  
Status: Failed
Vertex failed, vertexName=Map 1, vertexId=vertex_1421234198072_0091_1_01, diagnostics=[Vertex Input: measures initializer failed.]
Vertex killed, vertexName=Reducer 2, vertexId=vertex_1421234198072_0091_1_00, diagnostics=[Vertex > received Kill in INITED state.]
DAG failed due to vertex failure. failedVertices:1 killedVertices:1
FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.tez.TezTask

我已经使用以下工作创建了我的表和索引:

DROP TABLE IF EXISTS Measures;
CREATE TABLE Measures(
    topology string,
    val double,
    date timestamp,
)
ROW FORMAT SERDE 'org.openx.data.jsonserde.JsonSerDe'
STORED AS TEXTFILE LOCATION 'wasb://<mycontainer>@<mystorage>.blob.core.windows.net/';
CREATE INDEX measures_index_topology ON TABLE Measures (topology) AS 'COMPACT' WITH DEFERRED REBUILD;
CREATE INDEX measures_index_date ON TABLE Measures (date) AS 'COMPACT' WITH DEFERRED REBUILD;
ALTER INDEX measures_index_topology ON Measures REBUILD;
ALTER INDEX measures_index_date ON Measures REBUILD;

我错在哪里?为什么我的重建索引失败?此致敬意

看起来 Tez 可能在空表上生成索引时遇到问题。 我能够得到与您相同的错误(不使用 JSON SerDe),如果您查看失败的 DAG 的应用程序日志,您可能会看到类似以下内容:

java.lang.NullPointerException
    at org.apache.hadoop.hive.ql.io.HiveInputFormat.init(HiveInputFormat.java:254)
    at org.apache.hadoop.hive.ql.io.HiveInputFormat.getSplits(HiveInputFormat.java:299)
    at org.apache.hadoop.mapred.split.TezGroupedSplitsInputFormat.getSplits(TezGroupedSplitsInputFormat.java:68)
    at org.apache.tez.mapreduce.hadoop.MRHelpers.generateOldSplits(MRHelpers.java:263)
    at org.apache.tez.mapreduce.common.MRInputAMSplitGenerator.initialize(MRInputAMSplitGenerator.java:139)
    at org.apache.tez.dag.app.dag.RootInputInitializerRunner$InputInitializerCallable$1.run(RootInputInitializerRunner.java:154)
    at org.apache.tez.dag.app.dag.RootInputInitializerRunner$InputInitializerCallable$1.run(RootInputInitializerRunner.java:146)
    ...

如果您使用单个虚拟记录填充表,它似乎工作正常。 我使用过:

INSERT INTO TABLE Measures SELECT market,0,0 FROM hivesampletable limit 1;

之后,索引重建能够正常运行而不会出错。

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