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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13065) Hive throws NPE when writing map type data to a HBase backed table
Date Wed, 17 Feb 2016 20:23:18 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15151100#comment-15151100
] 

Aihua Xu commented on HIVE-13065:
---------------------------------

The patch looks good. +1.

> Hive throws NPE when writing map type data to a HBase backed table
> ------------------------------------------------------------------
>
>                 Key: HIVE-13065
>                 URL: https://issues.apache.org/jira/browse/HIVE-13065
>             Project: Hive
>          Issue Type: Bug
>          Components: HBase Handler
>    Affects Versions: 1.1.0, 2.0.0
>            Reporter: Yongzhi Chen
>            Assignee: Yongzhi Chen
>         Attachments: HIVE-13065.1.patch
>
>
> Hive throws NPE when writing data to a HBase backed table with below conditions:
> # There is a map type column
> # The map type column has NULL in its values
> Below are the reproduce steps:
> *1) Create a HBase backed Hive table*
> {code:sql}
> create table hbase_test (id bigint, data map<string, string>)
> stored by 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
> with serdeproperties ("hbase.columns.mapping" = ":key,cf:map_col")
> tblproperties ("hbase.table.name" = "hive_test");
> {code}
> *2) insert data into above table*
> {code:sql}
> insert overwrite table hbase_test select 1 as id, map('abcd', null) as data from src
limit 1;
> {code}
> The mapreduce job for insert query fails. Error messages are as below:
> {noformat}
> 2016-02-15 02:26:33,225 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running
child : java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: Hive
Runtime Error while processing row (tag=0) {"key":{},"value":{"_col0":1,"_col1":{"abcd":null}}}
> 	at org.apache.hadoop.hive.ql.exec.mr.ExecReducer.reduce(ExecReducer.java:265)
> 	at org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:444)
> 	at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:392)
> 	at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:415)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671)
> 	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while
processing row (tag=0) {"key":{},"value":{"_col0":1,"_col1":{"abcd":null}}}
> 	at org.apache.hadoop.hive.ql.exec.mr.ExecReducer.reduce(ExecReducer.java:253)
> 	... 7 more
> Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.serde2.SerDeException:
java.lang.NullPointerException
> 	at org.apache.hadoop.hive.ql.exec.FileSinkOperator.processOp(FileSinkOperator.java:731)
> 	at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:815)
> 	at org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:84)
> 	at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:815)
> 	at org.apache.hadoop.hive.ql.exec.LimitOperator.processOp(LimitOperator.java:51)
> 	at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:815)
> 	at org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:84)
> 	at org.apache.hadoop.hive.ql.exec.mr.ExecReducer.reduce(ExecReducer.java:244)
> 	... 7 more
> Caused by: org.apache.hadoop.hive.serde2.SerDeException: java.lang.NullPointerException
> 	at org.apache.hadoop.hive.hbase.HBaseSerDe.serialize(HBaseSerDe.java:286)
> 	at org.apache.hadoop.hive.ql.exec.FileSinkOperator.processOp(FileSinkOperator.java:666)
> 	... 14 more
> Caused by: java.lang.NullPointerException
> 	at org.apache.hadoop.hive.serde2.lazy.LazyUtils.writePrimitiveUTF8(LazyUtils.java:221)
> 	at org.apache.hadoop.hive.hbase.HBaseRowSerializer.serialize(HBaseRowSerializer.java:236)
> 	at org.apache.hadoop.hive.hbase.HBaseRowSerializer.serialize(HBaseRowSerializer.java:275)
> 	at org.apache.hadoop.hive.hbase.HBaseRowSerializer.serialize(HBaseRowSerializer.java:222)
> 	at org.apache.hadoop.hive.hbase.HBaseRowSerializer.serializeField(HBaseRowSerializer.java:194)
> 	at org.apache.hadoop.hive.hbase.HBaseRowSerializer.serialize(HBaseRowSerializer.java:118)
> 	at org.apache.hadoop.hive.hbase.HBaseSerDe.serialize(HBaseSerDe.java:282)
> 	... 15 more
> {noformat}



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