我正在努力让hive-hadoop-mongo设置正常工作。我已经从json文件将数据导入mongodb,然后我在hive中创建了连接到mongo的内部和外部表:
CREATE EXTERNAL TABLE reviews(
user_id STRING,
review_id STRING,
stars INT,
date1 STRING,
text STRING,
type STRING,
business_id STRING
)
STORED BY 'com.mongodb.hadoop.hive.MongoStorageHandler'
WITH SERDEPROPERTIES('mongo.columns.mapping'='{"date1":"date"}')
TBLPROPERTIES('mongo.uri'='mongodb://localhost:27017/test.reviews');
这部分工作正常,因为选择所有查询(select * from reviews
)输出所有应有的东西。但是当我使用where子句(例如select * from reviews where stars=4
)时,hive会崩溃。
当我启动配置单元时,我添加了以下jar:
add jar mongo-hadoop.jar;
add jar mongo-java-driver-3.3.0.jar;
add jar mongo-hadoop-hive-2.0.1.jar;
如果它在任何意义上都是相关的,我正在使用亚马逊的EMR集群,我通过ssh连接。
感谢所有帮助
以下是错误配置单元抛出:
Exception in thread "main" java.lang.NoSuchMethodError: org.apache.hadoop.hive.ql.exec.Utilities.deserializeExpression(Ljava/lang/String;)Lorg/apache/hadoop/hive/ql/plan/ExprNodeGenericFuncDesc;
at com.mongodb.hadoop.hive.input.HiveMongoInputFormat.getFilter(HiveMongoInputFormat.java:134)
at com.mongodb.hadoop.hive.input.HiveMongoInputFormat.getRecordReader(HiveMongoInputFormat.java:103)
at org.apache.hadoop.hive.ql.exec.FetchOperator$FetchInputFormatSplit.getRecordReader(FetchOperator.java:691)
at org.apache.hadoop.hive.ql.exec.FetchOperator.getRecordReader(FetchOperator.java:329)
at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:455)
at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:424)
at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:144)
at org.apache.hadoop.hive.ql.Driver.getResults(Driver.java:1885)
at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:252)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:183)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:399)
at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:776)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:714)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:641)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
答案 0 :(得分:0)
如下所示的克里特岛表并检查。
CREATE [EXTERNAL] TABLE <tablename>
(<schema>)
ROW FORMAT SERDE 'com.mongodb.hadoop.hive.BSONSerDe'
[WITH SERDEPROPERTIES('mongo.columns.mapping'='<JSON mapping>')]
STORED AS INPUTFORMAT 'com.mongodb.hadoop.mapred.BSONFileInputFormat'
OUTPUTFORMAT 'com.mongodb.hadoop.hive.output.HiveBSONFileOutputFormat'
[LOCATION '<path to existing directory>'];
不是使用StorageHandler从Hive对象读取,序列化,反序列化和输出数据到BSON对象,而是单独列出各个组件。这是因为在处理本机HDFS文件系统时使用StorageHandler会产生太多负面影响
答案 1 :(得分:0)
我看到了
WITH SERDEPROPERTIES('mongo.columns.mapping'='{"date1":"date"}')
并且您正在查询未映射的列星。
答案 2 :(得分:0)
我在群集中遇到了这个问题。
群集配置单元版本高于mongo-hive中的版本(1.2.1)
旧类org.apache.hadoop.hive.ql.exec.Utilities.deserializeExpression已重命名为org.apache.hadoop.hive.ql.exec.SerializationUtilities.deserializeExpression
您需要自己重建jar。