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https://issues.apache.org/jira/browse/HIVE-13065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15149531#comment-15149531
]
Yibing Shi commented on HIVE-13065:
-----------------------------------
How about the reading part? If we skip the null values, would it affect the
reading part?
And what if we have a null value in key set? This is possible in theory.
> 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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