[jira] [Commented] (SQOOP-1533) Java 8 : sqoop import --create-hcatalog-table for mysql causes NullPointerException when column name contains upper case char

["Hari Sekhon (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SQOOP-1533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14383771#comment-14383771 ] 

Hari Sekhon commented on SQOOP-1533:
------------------------------------

I also have this problem when importing from SQL Server (we do a lot of SQL Server imports, the only change was using HCatalog to try to write directly as ORC).

> Java 8 : sqoop import --create-hcatalog-table for mysql causes NullPointerException when column name contains upper case char
> -----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SQOOP-1533
>                 URL: https://issues.apache.org/jira/browse/SQOOP-1533
>             Project: Sqoop
>          Issue Type: Bug
>         Environment: ubuntu, Sqoop 1.4.4-cdh5.1.2, java 8
>            Reporter: Shigeki Hirose
>            Priority: Critical
>
> Sqoop command example:
> {noformat}
> sqoop import --connect "jdbc:mysql://127.0.0.1:3306/xxx" --username xxx --password xxx --table SampleTable --hcatalog-database xxx --create-hcatalog-table --hcatalog-storage-stanza 'stored as orc' --hcatalog-table sampletable
> {noformat}
> Call stack:
> {noformat}
> sqoop.Sqoop: Got exception running Sqoop: java.lang.NullPointerException
> java.lang.NullPointerException
> 	at org.apache.sqoop.mapreduce.hcat.SqoopHCatUtilities.createHCatTable(SqoopHCatUtilities.java:491)
> 	at org.apache.sqoop.mapreduce.hcat.SqoopHCatUtilities.configureHCat(SqoopHCatUtilities.java:293)
> 	at org.apache.sqoop.mapreduce.hcat.SqoopHCatUtilities.configureImportOutputFormat(SqoopHCatUtilities.java:657)
> 	at org.apache.sqoop.mapreduce.ImportJobBase.configureOutputFormat(ImportJobBase.java:98)
> 	at org.apache.sqoop.mapreduce.ImportJobBase.runImport(ImportJobBase.java:240)
> 	at org.apache.sqoop.manager.SqlManager.importTable(SqlManager.java:614)
> 	at org.apache.sqoop.manager.MySQLManager.importTable(MySQLManager.java:118)
> 	at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:413)
> 	at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:506)
> 	at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> 	at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
> 	at org.apache.sqoop.Sqoop.runTool(Sqoop.java:222)
> 	at org.apache.sqoop.Sqoop.runTool(Sqoop.java:231)
> 	at org.apache.sqoop.Sqoop.main(Sqoop.java:240)
> {noformat}
> This seems to be because source MySQL table contains a column name that has an upper case letter.
> Sample table below.   The column name, 'A', causes the exception.
> {code:sql}
> DROP TABLE `SampleTable`;
> CREATE TABLE `SampleTable` (
>   `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
>   `A` bigint(20) unsigned NOT NULL DEFAULT '0',
>   PRIMARY KEY (`id`)
> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
> {code}
> Once column name is changed to 'a', it works properly:
> {code:sql}
> DROP TABLE `SampleTable`;
> CREATE TABLE `SampleTable` (
>   `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
>   `a` bigint(20) unsigned NOT NULL DEFAULT '0',
>   PRIMARY KEY (`id`)
> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
> {code}
> This is probably because LCKeyMap (and HCKeyMap) class in SqoopHCatUtilities.java line 160 - 177 are expecting HashMap to call *put* method for each element when *putAll* is invoked, which seem to have been the case in Java 6/7, but it doesn't behave that way in Java 8.
> {code:java}
>   /**
>    * A Map using String as key type that ignores case of its key and stores the
>    * key in lower case.
>    */
>   private static class LCKeyMap<V> extends HashMap<String, V> {
>     private static final long serialVersionUID = -6751510232323094216L;
>     @Override
>     public V put(String key, V value) {
>       return super.put(key.toLowerCase(), value);
>     }
>     @Override
>     public V get(Object key) {
>       return super.get(((String) key).toLowerCase());
>     }
>   }
> {code}



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