当我在Hive上运行java函数时，我经常收到ArrayOutOfBounds错误。
这是我正在使用的 Java 代码，我已将其打包到 Jar 文件中以与 Hive 一起使用： 在此下，请找到 hive 代码来实现上述 Java 代码。
public class similarity_report extends GenericUDTF
{
private PrimitiveObjectInspector stringOI = null;
@Override
public StructObjectInspector initialize(ObjectInspector[] args) throws UDFArgumentException
{
//if (args.length != 1)
//
{ // throw new UDFArgumentException("similarityReport() takes exactly one argument"); // }
if (args[0].getCategory() != ObjectInspector.Category.PRIMITIVE
&& ((PrimitiveObjectInspector) args[0]).getPrimitiveCategory() != PrimitiveObjectInspector.PrimitiveCategory.STRING)
{ throw new UDFArgumentException("similarityReport() takes a string as a parameter"); }
stringOI = (PrimitiveObjectInspector) args[0];
List<String> fieldNames = new ArrayList<String>(41);
List<ObjectInspector> fieldOIs = new ArrayList<ObjectInspector>(41);
fieldNames.add("NAME_x");
fieldNames.add("VOTER ID_x");
fieldNames.add("FATHERS' NAME_x");
fieldNames.add("PIN CODE_x");
fieldNames.add("AREA_x");
fieldNames.add("TEHSIL_x");
fieldNames.add("DISTRICT_x");
fieldNames.add("POLICE STATION_x");
fieldNames.add("AGE_x");
fieldNames.add("Y-O-B_x");
fieldNames.add("GENDER_x");
fieldNames.add("HOUSE NUMBER_x");
fieldNames.add("STREET ADDRESS_x");
fieldNames.add("UNIQUE ID_x");
fieldNames.add("EDIT MAX_x");
fieldNames.add("MATCH ID_x");
fieldNames.add("FAKE MAX_x");
fieldNames.add("NAME_y");
fieldNames.add("VOTER ID_y");
fieldNames.add("FATHERS' NAME_y");
fieldNames.add("PIN CODE_y");
fieldNames.add("AREA_y");
fieldNames.add("TEHSIL_y");
fieldNames.add("DISTRICT_y");
fieldNames.add("POLICE STATION_y");
fieldNames.add("AGE_y");
fieldNames.add("Y-O-B_y");
fieldNames.add("GENDER_y");
fieldNames.add("HOUSE NUMBER_y");
fieldNames.add("STREET ADDRESS_y");
fieldNames.add("UNIQUE ID_y");
fieldNames.add("EDIT MAX_y");
fieldNames.add("MATCH ID_y");
fieldNames.add("FAKE MAX_y");
fieldNames.add("NAME SCORE");
fieldNames.add("ADDRESS SCORE");
fieldNames.add("CITY MATCH");
fieldNames.add("ZIP MATCH");
fieldNames.add("RELATIVE NAME SCORE");
fieldNames.add("VOTER ID MATCH");
fieldNames.add("KEY");
fieldOIs.add(PrimitiveObjectInspectorFactory.javaStringObjectInspector);
. . .
fieldOIs.add(PrimitiveObjectInspectorFactory.javaStringObjectInspector);
return ObjectInspectorFactory.getStandardStructObjectInspector(fieldNames, fieldOIs);
}
public ArrayList<Object[]> processInputRecord(String row)
{
ArrayList<Object[]> result = new ArrayList<Object[]>();
//ensure none of the fields are empty
String[] tokens = row.split("t");
System.out.println(tokens.length);
根据建议，我添加了上面的行^^
String Name_x = tokens[0];
String VoterID_x = tokens[1];
String FathersName_x = tokens[2];
String PinCode_x = tokens[3];
String Area_x = tokens[4];
String Tehsil_x = tokens[5];
String District_x = tokens[6];
String PoliceStation_x = tokens[7];
String Age_x = tokens[8];
String YOB_x = tokens[9];
String Gender_x = tokens[10];
String HouseNumber_x = tokens[11];
String StreetAddress_x = tokens[12];
String UniqueID_x = tokens[1];
String EditMax_x = tokens[14];
String MatchID_x = tokens[15];
String FakeMax_x = tokens[16];
String Name_y = tokens[17];
String VoterID_y = tokens[18];
String FathersName_y = tokens[19];
String PinCode_y = tokens[20];
String Area_y = tokens[21];
String Tehsil_y = tokens[22];
String District_y = tokens[23];
String PoliceStation_y = tokens[24];
String Age_y = tokens[25];
String YOB_y = tokens[26];
String Gender_y = tokens[27];
String HouseNumber_y = tokens[28];
String StreetAddress_y = tokens[29];
String UniqueID_y = tokens[18];
String EditMax_y = tokens[31];
String MatchID_y = tokens[32];
String FakeMax_y = tokens[33];
String NameScore = tokens[34];
String AddressScore = tokens[35];
String CityMatch = tokens[36];
String ZipMatch = tokens[37];
String RelativeNameScore = tokens[38];
String VoterIDMatch = tokens[39];
String Key = tokens[40];
String Address_x;
String Address_y;
String matchType = "";
if (matchType == "similar")
{
result.add(new Object[]
{ Name_x, VoterID_x, FathersName_x, PinCode_x, Area_x, Tehsil_x, District_x, PoliceStation_x, Age_x, YOB_x, Gender_x, HouseNumber_x, StreetAddress_x, UniqueID_x, EditMax_x, MatchID_x, FakeMax_x, NameScore, AddressScore, CityMatch, ZipMatch, RelativeNameScore, VoterIDMatch, Key});
result.add(new Object[] { Name_y, VoterID_y, FathersName_y, PinCode_y, Area_y, Tehsil_y, District_y, PoliceStation_y, Age_y, YOB_y, Gender_y, HouseNumber_y, StreetAddress_y, UniqueID_y, EditMax_y, MatchID_y, FakeMax_y, NameScore, AddressScore, CityMatch, ZipMatch, RelativeNameScore, VoterIDMatch, Key});
}
else if (matchType == "identical")
{
result.add(new Object[] { Name_x, VoterID_x, FathersName_x, PinCode_x, Area_x, Tehsil_x, District_x, PoliceStation_x, Age_x, YOB_x, Gender_x, HouseNumber_x, StreetAddress_x, UniqueID_x, EditMax_x, MatchID_x, FakeMax_x, NameScore, AddressScore, CityMatch, ZipMatch, RelativeNameScore, VoterIDMatch, Key}
);
}
else if (matchType == "different")
{
result.add(new Object[]
{ Name_x, VoterID_x, FathersName_x, PinCode_x, Area_x, Tehsil_x, District_x, PoliceStation_x, Age_x, YOB_x, Gender_x, HouseNumber_x, StreetAddress_x, UniqueID_x, EditMax_x, MatchID_x, FakeMax_x, NameScore, AddressScore, CityMatch, ZipMatch, RelativeNameScore, VoterIDMatch, Key}
);
result.add(new Object[]
{ Name_y, VoterID_y, FathersName_y, PinCode_y, Area_y, Tehsil_y, District_y, PoliceStation_y, Age_y, YOB_y, Gender_y, HouseNumber_y, StreetAddress_y, UniqueID_y, EditMax_y, MatchID_y, FakeMax_y, NameScore, AddressScore, CityMatch, ZipMatch, RelativeNameScore, VoterIDMatch, Key}
);
}
return result;
}
@Override
public void process(Object[] record) throws HiveException
{
final String row = stringOI.getPrimitiveJavaObject(record[0]).toString();
ArrayList<Object[]> results = processInputRecord(row);
Iterator<Object[]> it = results.iterator();
while (it.hasNext())
{ Object[] r = it.next(); forward(r); }
}
@Override
public void close() throws HiveException
{ // do nothing }
}
这是要处理的配置单元代码上面的代码在配置单元表上的代码：
set mapred.job.queue.name=buanlst;
CREATE DATABASE IF NOT EXISTS saihieldb;
USE saihieldb;
CREATE TABLE datafile_to_dedupe (name_x String, voterid_x String, fathersname_x String, pincode_x String, area_x String, tehsil_x String, district_x String, policestation_x String, age_x String, yob_x String, gender_x String, housenumber_x String, streetaddress_x String)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY 't'
LINES TERMINATED BY 'n'
STORED AS TEXTFILE;
LOAD DATA LOCAL INPATH '/idn/home/sbaks31/APRIORI_MUMBAI_SAMPLE_TAB_DELIMITED.txt' OVERWRITE INTO TABLE datafile_to_dedupe;
ALTER TABLE datafile_to_dedupe ADD COLUMNS (uniqueid_x String, editmax_x String, matchid_x String, fakemax_x String);
CREATE TABLE datafile_to_dedupe1 (name_y String, voterid_y String, fathersname_y String, pincode_y String, area_y String, tehsil_y String, district_y String, policestation_y String, age_y String, yob_y String, gender_y String, housenumber_y String, streetaddress_y String)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY 't'
LINES TERMINATED BY 'n'
STORED AS TEXTFILE;
LOAD DATA LOCAL INPATH '/idn/home/sbaks31/APRIORI_MUMBAI_SAMPLE_TAB_DELIMITED.txt' OVERWRITE INTO TABLE datafile_to_dedupe1;
ALTER TABLE datafile_to_dedupe ADD COLUMNS (uniqueid_y String, editmax_y String, matchid_y String, fakemax_y String);
CREATE TABLE crossed (name_x String, voterid_x String, fathersname_x String, pincode_x String, area_x String, tehsil_x String, district_x String, policestation_x String, age_x String, yob_x String, gender_x String, housenumber_x String, streetaddress_x String, uniqueid_x String, editmax_x String, matchid_x String, fakemax_x String, name_y String, voterid_y String, fathersname_y String, pincode_y String, area_y String, tehsil_y String, district_y String, policestation_y String, age_y String, yob_y String, gender_y String, housenumber_y String, streetaddress_y String, uniqueid_y String, editmax_y String, matchid_y String, fakemax_y String)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY 't'
LINES TERMINATED BY 'n'
STORED AS TEXTFILE;
INSERT OVERWRITE TABLE crossed SELECT * FROM saihieldb.datafile_to_dedupe CROSS JOIN saihieldb.datafile_to_dedupe1 on (datafile_to_dedupe.name_x = datafile_to_dedupe1.name_y);
ALTER TABLE crossed ADD COLUMNS (namescore String, addressscore String, citymatch String, zipmatch String, relativenamescore String, voteridmatch String, Key String);
add jar /idn/home/sbaks31/DedupeFinal1.jar.filepart;
create temporary function fun3 as 'com.similarity_report';
CREATE VIEW newview4 AS select fun3(name_x, voterid_x, fathersname_x, pincode_x, area_x, tehsil_x, district_x, policestation_x, age_x, yob_x, gender_x, housenumber_x, streetaddress_x, uniqueid_x, editmax_x, matchid_x, fakemax_x, name_y, voterid_y, fathersname_y, pincode_y, area_y, tehsil_y, district_y, policestation_y, age_y, yob_y, gender_y, housenumber_y, streetaddress_y, uniqueid_y, editmax_y, matchid_y, fakemax_y, namescore, addressscore, citymatch, zipmatch, relativenamescore, voteridmatch, Key) from saihieldb.crossed;
select * from newview4 limit 10;
^^这是我收到错误的地方。 请让我知道出了什么问题？？
在我尝试打印令牌数组的长度后，我得到长度仅为 1..有人可以澄清为什么它在数组中只取 1 个值吗？
在这段代码之后：
字符串[] 标记 = row.split("\t"(;
写：
System.out.println(tokens.length(;
并在该行放置一个断点以便进行调试。 这将允许您查看数组的实际长度。 因为如果你的数组"tokens"的长度是5，当你尝试调用tokens[6]、tokens[7]、<...>、tokens[40]等时，你会得到一个异常。