Demeter Sztanko created HIVE-10437:
--------------------------------------
Summary: 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
Affects Versions: 1.1.0
Reporter: Demeter Sztanko
Priority: Minor
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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