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https://issues.apache.org/jira/browse/HIVE-10437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14520374#comment-14520374
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Gunther Hagleitner commented on HIVE-10437:
-------------------------------------------
+1 nice and simple.
> NullPointerException on queries where map/reduce is not involved on tables
> with partitions
> ------------------------------------------------------------------------------------------
>
> Key: HIVE-10437
> URL: https://issues.apache.org/jira/browse/HIVE-10437
> Project: Hive
> Issue Type: Bug
> Components: Serializers/Deserializers
> Affects Versions: 1.1.0
> Reporter: Demeter Sztanko
> Assignee: Ashutosh Chauhan
> Priority: Critical
> Attachments: HIVE-10437.patch
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> On a table with partitions, whenever I try to do a simple query which tells
> hive not to execute mapreduce but just read data straight from hdfs, it
> raises an exception:
> {code}
> create external table jsonbug(
> a int,
> b string
> )
> PARTITIONED BY (
> `c` string)
> ROW FORMAT SERDE
> 'org.openx.data.jsonserde.JsonSerDe'
> WITH SERDEPROPERTIES (
> 'ignore.malformed.json'='true')
> STORED AS INPUTFORMAT
> 'org.apache.hadoop.mapred.TextInputFormat'
> OUTPUTFORMAT
> 'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
> LOCATION
> '/tmp/jsonbug';
> ALTER TABLE jsonbug ADD PARTITION(c='1');
> {code}
> Runnin simple
> {code}
> select * from jsonbug;
> {code}
> Raises the following exception:
> {code}
> FAILED: RuntimeException org.apache.hadoop.hive.ql.metadata.HiveException:
> Failed with exception nulljava.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.exec.FetchOperator.needConversion(FetchOperator.java:607)
> at
> org.apache.hadoop.hive.ql.exec.FetchOperator.setupOutputObjectInspector(FetchOperator.java:578)
> at
> org.apache.hadoop.hive.ql.exec.FetchOperator.initialize(FetchOperator.java:172)
> at
> org.apache.hadoop.hive.ql.exec.FetchOperator.<init>(FetchOperator.java:140)
> at org.apache.hadoop.hive.ql.exec.FetchTask.initialize(FetchTask.java:79)
> at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:455)
> at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:307)
> at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1112)
> at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1160)
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1049)
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1039)
> at
> org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:207)
> at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:159)
> at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:370)
> at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:754)
> at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:675)
> at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:615)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at org.apache.hadoop.util.RunJar.main(RunJar.java:160)
> {code}
> It works fine if I execute a query involving map/reduce job though.
> This problem occurs only when using SerDe's created for hive versions pre
> 1.1.0, those which do not have @SerDeSpec annotation specified. Most of the
> third party SerDE's, including hcat's JsonSerde have this problem as well.
> It seems like changes made in HIVE-7977 introduce this bug. See
> org.apache.hadoop.hive.ql.exec.FetchOperator.needConversion(FetchOperator.java:607)
> {code}
> Class<?> tableSerDe = tableDesc.getDeserializerClass();
> String[] schemaProps = AnnotationUtils.getAnnotation(tableSerDe,
> SerDeSpec.class).schemaProps();
> {code}
> And it also seems like a relatively easy fix.
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