首页 > 代码库 > 排查Hive报错:org.apache.hadoop.hive.serde2.SerDeException: java.io.IOException: Start of Array expected
排查Hive报错:org.apache.hadoop.hive.serde2.SerDeException: java.io.IOException: Start of Array expected
CREATE TABLE json_nested_test ( count string, usage string, pkg map<string,string>, languages array<string>, store map<string,array<map<string,string>>>)ROW FORMAT SERDE ‘org.apache.hive.hcatalog.data.JsonSerDe‘STORED AS TEXTFILE;
以上述sql创建表json_nested_test后,查询时发现报错:Failed with exception java.io.IOException:org.apache.hadoop.hive.serde2.SerDeException: java.io.IOException: Start of Array expected
于是进行如下测试,发现是org.apache.hive.hcatalog.data.JsonSerDe 对复杂类型支持不足造成,例如map<string,array<string>>,这个例子中就是不支持array作为map的value.
CREATE TABLE json_nested_test_openx ( count string, usage string, pkg map<string,string>, languages array<string>, store map<string,array<map<string,string>>>)ROW FORMAT SERDE ‘org.openx.data.jsonserde.JsonSerDe‘STORED AS TEXTFILE;CREATE TABLE s1 ( count string, usage string)ROW FORMAT SERDE ‘org.apache.hive.hcatalog.data.JsonSerDe‘STORED AS TEXTFILE;load data local inpath ‘/home/work/s1.txt‘ overwrite into table s1;select * from s1;CREATE TABLE s2 ( count string, usage string, pkg map<string,string>)ROW FORMAT SERDE ‘org.apache.hive.hcatalog.data.JsonSerDe‘STORED AS TEXTFILE;load data local inpath ‘/home/work/s2.txt‘ overwrite into table s2;select * from s2;CREATE TABLE s3 ( count string, usage string, pkg map<string,string>, languages array<string>)ROW FORMAT SERDE ‘org.apache.hive.hcatalog.data.JsonSerDe‘STORED AS TEXTFILE;load data local inpath ‘/home/work/s3.txt‘ overwrite into table s3;select * from s3;CREATE TABLE s4 ( count string, usage string, pkg map<string,string>, languages array<string>, store map<string,array<map<string,string>>>)ROW FORMAT SERDE ‘org.apache.hive.hcatalog.data.JsonSerDe‘STORED AS TEXTFILE;load data local inpath ‘/home/work/s4.txt‘ overwrite into table s4;select * from s4;CREATE TABLE s5 ( store map<string,array<map<string,string>>>)ROW FORMAT SERDE ‘org.apache.hive.hcatalog.data.JsonSerDe‘STORED AS TEXTFILE;load data local inpath ‘/home/work/s5.txt‘ overwrite into table s5;select * from s5;CREATE TABLE s6 ( store map<string,array<string>>)ROW FORMAT SERDE ‘org.apache.hive.hcatalog.data.JsonSerDe‘STORED AS TEXTFILE;load data local inpath ‘/home/work/s6.txt‘ overwrite into table s6;select * from s6;
这个Serde hive自带,路径为$HIVE_HOME/hcatalog/share/hcatalog/hive-hcatalog-core-1.2.1.jar,它也存在其它问题:不支持数据文件中的空行
排查Hive报错:org.apache.hadoop.hive.serde2.SerDeException: java.io.IOException: Start of Array expected
声明:以上内容来自用户投稿及互联网公开渠道收集整理发布,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任,若内容有误或涉及侵权可进行投诉: 投诉/举报 工作人员会在5个工作日内联系你,一经查实,本站将立刻删除涉嫌侵权内容。