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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