Dustin Cote created HIVE-10851:
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Summary: HCatalog NullPointerException when using views in Pig
Key: HIVE-10851
URL: https://issues.apache.org/jira/browse/HIVE-10851
Project: Hive
Issue Type: Bug
Components: HCatalog, StorageHandler
Reporter: Dustin Cote
When trying to access a hive table view with HCatalog through Pig, a
NullPointerException is thrown. I realize that it is documented here that
HCatalog and views do not work for Pig:
https://cwiki.apache.org/confluence/display/Hive/HCatalog+CLI#HCatalogCLI-Create/Drop/AlterView
However, surfacing a NullPointerException is not the proper way to handle the
incompatibility. Stack trace below:
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open
iterator for alias A
at org.apache.pig.PigServer.openIterator(PigServer.java:892)
at
org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:774)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:372)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:198)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:173)
at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:69)
at org.apache.pig.Main.run(Main.java:541)
at org.apache.pig.Main.main(Main.java:156)
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.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: org.apache.pig.PigException: ERROR 1002: Unable to store alias A
at org.apache.pig.PigServer.storeEx(PigServer.java:994)
at org.apache.pig.PigServer.store(PigServer.java:954)
at org.apache.pig.PigServer.openIterator(PigServer.java:867)
... 13 more
Caused by:
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobCreationException:
ERROR 2017: Internal error creating job configuration.
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.getJob(JobControlCompiler.java:873)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.compile(JobControlCompiler.java:298)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:190)
at org.apache.pig.PigServer.launchPlan(PigServer.java:1334)
at
org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1319)
at org.apache.pig.PigServer.storeEx(PigServer.java:990)
... 15 more
Caused by: java.io.IOException: java.lang.NullPointerException
at
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:97)
at
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:61)
at
org.apache.hive.hcatalog.pig.HCatLoader.setLocation(HCatLoader.java:127)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.getJob(JobControlCompiler.java:498)
... 20 more
Caused by: java.lang.NullPointerException
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at
org.apache.hive.hcatalog.mapreduce.FosterStorageHandler.<init>(FosterStorageHandler.java:59)
at
org.apache.hive.hcatalog.common.HCatUtil.getStorageHandler(HCatUtil.java:404)
at
org.apache.hive.hcatalog.common.HCatUtil.getStorageHandler(HCatUtil.java:367)
at
org.apache.hive.hcatalog.mapreduce.InitializeInput.extractPartInfo(InitializeInput.java:158)
at
org.apache.hive.hcatalog.mapreduce.InitializeInput.getInputJobInfo(InitializeInput.java:137)
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