[jira] [Created] (HIVE-14662) Wrong Class Instance When Using Custom SERDE

["Nemon Lou (JIRA)" <ji...@apache.org>]

Nemon Lou created HIVE-14662:
--------------------------------

             Summary: Wrong Class Instance When Using Custom SERDE
                 Key: HIVE-14662
                 URL: https://issues.apache.org/jira/browse/HIVE-14662
             Project: Hive
          Issue Type: Bug
          Components: Serializers/Deserializers
            Reporter: Nemon Lou
            Assignee: Nemon Lou


Using  [SERDE for mongoDB|https://github.com/mongodb/mongo-hadoop/blob/master/hive/src/main/java/com/mongodb/hadoop/hive/BSONSerDe.java]
DDL
{noformat}
create external table mytable (ID STRING..) 
ROW FORMAT SERDE  'com.mongodb.hadoop.hive.BSONSerDe' 
WITH SERDEPROPERTIES('mongo.columns.mapping'='{"ID":"_id",.. }')
STORED AS INPUTFORMAT 'com.mongodb.hadoop.mapred.BSONFileInputFormat'
OUTPUTFORMAT 'com.mongodb.hadoop.hive.output.HiveBSONFileOutputFormat'
LOCATION 'hdfs:///mypath'; 
{noformat}
Open beeline and run the following query ,and then open another beeline,run this again.Then fails.
{noformat}
add jar hdfs:///tmp/mongo-hadoop-hive-1.4.2_new.jar;
add jar hdfs:///tmp/mongo-java-driver-3.0.4.jar;
add jar hdfs:///tmp/mongo-hadoop-core-1.4.2_new.jar;
select * from mytable limit 1;
{noformat}

Error log :
{noformat}
2016-08-25 09:30:34,475 | WARN  | HiveServer2-Handler-Pool: Thread-11972 | Error fetching results:  | org.apache.hive.service.cli.thrift.ThriftCLIService.FetchResults(ThriftCLIService.java:1058)
org.apache.hive.service.cli.HiveSQLException: java.io.IOException: org.apache.hadoop.hive.serde2.SerDeException: class com.mongodb.hadoop.hive.BSONSerDerequires a BSONWritable object, notclass com.mongodb.hadoop.io.BSONWritable
        at org.apache.hive.service.cli.operation.SQLOperation.getNextRowSet(SQLOperation.java:366)
        at org.apache.hive.service.cli.operation.OperationManager.getOperationNextRowSet(OperationManager.java:251)
        at org.apache.hive.service.cli.session.HiveSessionImpl.fetchResults(HiveSessionImpl.java:710)
        at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.hive.service.cli.session.HiveSessionProxy.invoke(HiveSessionProxy.java:78)
        at org.apache.hive.service.cli.session.HiveSessionProxy.access$000(HiveSessionProxy.java:36)
        at org.apache.hive.service.cli.session.HiveSessionProxy$1.run(HiveSessionProxy.java:63)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1673)
        at org.apache.hive.service.cli.session.HiveSessionProxy.invoke(HiveSessionProxy.java:59)
        at com.sun.proxy.$Proxy20.fetchResults(Unknown Source)
        at org.apache.hive.service.cli.CLIService.fetchResults(CLIService.java:451)
        at org.apache.hive.service.cli.thrift.ThriftCLIService.FetchResults(ThriftCLIService.java:1049)
        at org.apache.hive.service.cli.thrift.TCLIService$Processor$FetchResults.getResult(TCLIService.java:1553)
        at org.apache.hive.service.cli.thrift.TCLIService$Processor$FetchResults.getResult(TCLIService.java:1538)
        at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
        at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
        at org.apache.hadoop.hive.thrift.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor.process(HadoopThriftAuthBridge.java:692)
        at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:285)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: org.apache.hadoop.hive.serde2.SerDeException: class com.mongodb.hadoop.hive.BSONSerDerequires a BSONWritable object, notclass com.mongodb.hadoop.io.BSONWritable
        at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:507)
        at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:414)
        at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:140)
        at org.apache.hadoop.hive.ql.Driver.getResults(Driver.java:1756)
        at org.apache.hive.service.cli.operation.SQLOperation.getNextRowSet(SQLOperation.java:361)
        ... 24 more
Caused by: org.apache.hadoop.hive.serde2.SerDeException: class com.mongodb.hadoop.hive.BSONSerDerequires a BSONWritable object, notclass com.mongodb.hadoop.io.BSONWritable
        at com.mongodb.hadoop.hive.BSONSerDe.deserialize(BSONSerDe.java:196)
        at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:488)
        ... 28 more
{noformat}

Note:must make sure the table is not empty.



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