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  1. Sqoop (Retired)
  2. SQOOP-3030

Export to Oracle using (--direct + --hcatalog + --columns) with columns having the wrong case sensitivity fails with NPE

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Details

    • Bug
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • connectors/oracle, hive-integration
    • None

    Description

      It appears that if the case of the columns in the Oracle RDBMS are not used with the Sqoop --columns option with (export + --hcatalog + --direct) the Sqoop map task will fail with an NPE where the non-direct path fails correct. My test case is below, please review and let me know if you have any questions.

      Additionally it would be nice if we could detect this column case mis-match during compile time and not submit the job only to have it fail in YARN.

      TEST CASE:

STEP 01 : Create Oracle Source/Target Table

sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query "drop table t1"
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query "create table t1 (c1 int, c2 varchar(10))"
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query "insert into t1 values (1, 'some data')"
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query "select * from t1"
-------------------------------------
| C1                   | C2         | 
-------------------------------------
| 1                    | some data  | 
-------------------------------------

STEP 02 : Import Oracle Table using Sqoop --hcatalog options

beeline -u jdbc:hive2:// -e "use default; drop table t1_text;"
sqoop import --connect $MYCONN --username $MYUSER --password $MYPSWD --table T1 --num-mappers 1 --hcatalog-database default --hcatalog-table t1_text --create-hcatalog-table --hcatalog-storage-stanza 'stored as textfile'
beeline -u jdbc:hive2:// -e "use default; select * from t1_text;"

Output:
<SNIP>
16/10/18 09:11:31 INFO hcat.SqoopHCatUtilities: Database column names projected : [c1, c2]
16/10/18 09:11:31 INFO hcat.SqoopHCatUtilities: Database column name - info map :
	c1 : [Type : 2,Precision : 38,Scale : 0]
	c2 : [Type : 12,Precision : 10,Scale : 0]
16/10/18 09:11:31 INFO hcat.SqoopHCatUtilities: Creating HCatalog table default.t1_text for import
16/10/18 09:11:31 INFO hcat.SqoopHCatUtilities: HCatalog Create table statement: 
create table `default`.`t1_text` (
	`c1` decimal(38),
	`c2` varchar(10))
stored as textfile
<SNIP>
16/10/18 09:12:14 INFO mapreduce.ImportJobBase: Transferred 12 bytes in 34.4222 seconds (0.3486 bytes/sec)
16/10/18 09:12:14 INFO mapreduce.ImportJobBase: Retrieved 1 records.
---
+-------------+-------------+--+
| t1_text.c1  | t1_text.c2  |
+-------------+-------------+--+
| 1           | some data   |
+-------------+-------------+--+

STEP 03 : Attempt Export to Oracle using Sqoop --hcatalog and --columns options

sqoop export --connect $MYCONN --username $MYUSER --password $MYPSWD --table T2 --num-mappers 2 --hcatalog-database default --hcatalog-table t1_text --columns "c1,c2"

Output: (failure = correct)
<SNIP>
16/10/18 09:13:48 INFO hcat.SqoopHCatUtilities: Database column names projected : [c1, c2]
16/10/18 09:13:48 INFO hcat.SqoopHCatUtilities: Database column name - info map :
	c1 : [Type : 2,Precision : 38,Scale : 0]
	c2 : [Type : 12,Precision : 10,Scale : 0]
<SNIP>
16/10/18 09:13:48 INFO hive.metastore: Connected to metastore.
16/10/18 09:13:48 INFO hcat.SqoopHCatUtilities: HCatalog full table schema fields = [c1, c2]
16/10/18 09:13:49 INFO Configuration.deprecation: mapred.output.dir is deprecated. Instead, use mapreduce.output.fileoutputformat.outputdir
16/10/18 09:13:49 INFO hcat.SqoopHCatUtilities: HCatalog table partitioning key fields = []
16/10/18 09:13:49 INFO hcat.SqoopHCatUtilities: HCatalog projected schema fields = [c1, c2]
<SNIP>
16/10/18 09:14:22 INFO mapreduce.ExportJobBase: Exported 0 records.
16/10/18 09:14:22 ERROR tool.ExportTool: Error during export: Export job failed!
---
2016-10-18 09:14:19,418 INFO [main] org.apache.hive.hcatalog.mapreduce.InternalUtil: Initializing org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe with properties {transient_lastDdlTime=1476807097, name=default.t1_text, serialization.null.format=\N, columns=c1,c2, serialization.lib=org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, serialization.format=1, columns.types=decimal(38,0),varchar(10)}
2016-10-18 09:14:19,660 INFO [Thread-12] org.apache.sqoop.mapreduce.AutoProgressMapper: Auto-progress thread is finished. keepGoing=false
2016-10-18 09:14:19,952 ERROR [Thread-11] org.apache.sqoop.mapreduce.AsyncSqlOutputFormat: Got exception in update thread: java.sql.SQLSyntaxErrorException: ORA-00904: "c2": invalid identifier

STEP 03 : Attempt Export to Oracle using Sqoop --hcatalog and --columns options and Oracle --direct

sqoop export --connect $MYCONN --username $MYUSER --password $MYPSWD --table T2 --num-mappers 2 --hcatalog-database default --hcatalog-table t1_text --columns "c1,c2" --direct

Output: (failure = not correct (NPE))
<SNIP>
16/10/18 09:17:47 INFO oracle.OraOopManagerFactory: 
**************************************************
*** Using Data Connector for Oracle and Hadoop ***
**************************************************
16/10/18 09:17:47 INFO oracle.OraOopManagerFactory: Oracle Database version: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
16/10/18 09:17:47 INFO oracle.OraOopManagerFactory: This Oracle database is not a RAC.
16/10/18 09:17:47 INFO Configuration.deprecation: mapred.map.max.attempts is deprecated. Instead, use mapreduce.map.maxattempts
16/10/18 09:17:47 INFO tool.CodeGenTool: Beginning code generation
16/10/18 09:17:47 INFO manager.SqlManager: Executing SQL statement: SELECT "C1","C2" FROM T2 WHERE 0=1
<SNIP>
16/10/18 09:17:50 INFO mapreduce.ExportJobBase: Configuring HCatalog for export job
16/10/18 09:17:50 INFO hcat.SqoopHCatUtilities: Configuring HCatalog specific details for job
16/10/18 09:17:50 INFO manager.SqlManager: Executing SQL statement: SELECT "C1","C2" FROM "T2" WHERE 1=0
16/10/18 09:17:50 INFO hcat.SqoopHCatUtilities: Database column names projected : [c1, c2]
16/10/18 09:17:50 INFO hcat.SqoopHCatUtilities: Database column name - info map :
	c1 : [Type : 2,Precision : 38,Scale : 0]
	c2 : [Type : 12,Precision : 10,Scale : 0]
<SNIP>
16/10/18 09:17:51 INFO hive.metastore: Connected to metastore.
16/10/18 09:17:52 INFO hcat.SqoopHCatUtilities: HCatalog full table schema fields = [c1, c2]
<SNIP>
16/10/18 09:18:25 INFO mapreduce.ExportJobBase: Exported 0 records.
16/10/18 09:18:25 ERROR tool.ExportTool: Error during export: Export job failed!
---
2016-10-18 09:18:23,561 INFO [main] org.apache.sqoop.manager.oracle.OraOopOutputFormatBase: The number of rows per batch is: 100
2016-10-18 09:18:23,561 INFO [main] org.apache.sqoop.manager.oracle.OraOopOutputFormatBase: The number of batches per commit is: 100
2016-10-18 09:18:23,721 INFO [main] org.apache.sqoop.manager.oracle.OraOopOutputFormatBase: This record writer is connected to Oracle via the JDBC URL: 
	"oracle.jdbc.driver.T4CConnection@34133979"
	to the Oracle instance: "ORCL"
2016-10-18 09:18:23,828 INFO [main] org.apache.sqoop.manager.oracle.OraOopOracleQueries: Session Time Zone set to GMT
2016-10-18 09:18:23,883 INFO [main] org.apache.sqoop.manager.oracle.OracleConnectionFactory: Initializing Oracle session with SQL :
begin 
  dbms_application_info.set_module(module_name => 'Data Connector for Oracle and Hadoop', action_name => 'export 20161018091747PDT'); 
end;
2016-10-18 09:18:23,883 WARN [main] org.apache.sqoop.manager.oracle.OracleConnectionFactory: No Oracle 'session initialization' statements were found to execute.
Check that your oraoop-site-template.xml and/or oraoop-site.xml files are correctly installed in the ${SQOOP_HOME}/conf directory.
2016-10-18 09:18:24,116 INFO [main] org.apache.hive.hcatalog.mapreduce.InternalUtil: Initializing org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe with properties {transient_lastDdlTime=1476807097, name=default.t1_text, serialization.null.format=\N, columns=c1,c2, serialization.lib=org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, serialization.format=1, columns.types=decimal(38,0),varchar(10)}
2016-10-18 09:18:24,345 INFO [Thread-12] org.apache.sqoop.mapreduce.AutoProgressMapper: Auto-progress thread is finished. keepGoing=false
2016-10-18 09:18:24,357 INFO [main] org.apache.sqoop.manager.oracle.OraOopOutputFormatBase: Batch-Mode insert statement:
insert  into "SQOOP"."T2"
("C1"
,"C2")
values
(:C1
,:C2)
2016-10-18 09:18:24,358 ERROR [main] org.apache.sqoop.manager.oracle.OraOopOutputFormatInsert: The following error occurred during configurePreparedStatement()
java.lang.NullPointerException
	at org.apache.sqoop.manager.oracle.OraOopOutputFormatBase$OraOopDBRecordWriterBase.setBindValueAtName(OraOopOutputFormatBase.java:432)

STEP 04 : Verify Export without --direct and correct column case works

sqoop export --connect $MYCONN --username $MYUSER --password $MYPSWD --table T1 --num-mappers 2 --hcatalog-database default --hcatalog-table t1_text --columns "C1,C2" 
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query "select * from t1"

Output:
16/10/18 09:26:46 INFO mapreduce.ExportJobBase: Transferred 7.79 KB in 30.9303 seconds (257.9025 bytes/sec)
16/10/18 09:26:46 INFO mapreduce.ExportJobBase: Exported 1 records.
---
-------------------------------------
| C1                   | C2         | 
-------------------------------------
| 1                    | some data  | 
| 1                    | some data  | 
-------------------------------------

STEP 05 : Verify Export with --direct and correct column case works

sqoop export --connect $MYCONN --username $MYUSER --password $MYPSWD --table T1 --num-mappers 2 --hcatalog-database default --hcatalog-table t1_text --columns "C1,C2" --direct
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query "select * from t1"

Output:
<SNIP>
16/10/18 09:30:40 INFO oracle.OraOopManagerFactory: 
**************************************************
*** Using Data Connector for Oracle and Hadoop ***
**************************************************
<SNIP>
16/10/18 09:31:16 INFO mapreduce.ExportJobBase: Transferred 7.79 KB in 30.9987 seconds (257.333 bytes/sec)
16/10/18 09:31:16 INFO mapreduce.ExportJobBase: Exported 1 records.
---
-------------------------------------
| C1                   | C2         | 
-------------------------------------
| 1                    | some data  | 
| 1                    | some data  | 
| 1                    | some data  | 
-------------------------------------

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          breaks

          Bug - A problem which impairs or prevents the functions of the product. SQOOP-3025 Oracle Direct export from HCatalog parquet table gives NPE in kerberized cluster

          • Major - Major loss of function.
          • Resolved
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. SQOOP-3029 Add an option for uppercase/lowercase column name mapping between HCatalog and RDBMS cloumn name list

          • Major - Major loss of function.
          • Open

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              Unassigned Unassigned
              markuskemper@me.com Markus Kemper
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                Updated: