带有Tez的Azure HDInsight上的Hive上的重建索引失败

Question

我尝试在启用Tez的Azure HDInsight的Hive上创建索引。 我可以成功创建索引，但是无法重建它们：此输出失败，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

我用以下作业创建了表和索引：

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;

我哪里错了？ 为什么我的重建索引失败？ 最好的祝福

Answer 1

看起来Tez在空表上生成索引可能有问题。 我能够收到与您相同的错误（不使用JSON SerDe），并且如果查看失败的DAG的应用程序日志，则可能会看到类似以下内容的信息：

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)
    ...

如果用单个伪记录填充表，它似乎可以正常工作。 我用了：

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

在那之后，索引重建能够无错误地运行。