Hi All,
I was running HCatStore and HCatLoader in pig grunt. But encounter "ERROR 2088:
Fetch failed. Couldn't retrieve result". Please help give a glance and give
your suggestions. Thanks.
Test case:
1. Create table in hive:
create table junit_unparted_basic(a int, b string) stored as RCFILE
tblproperties('hcat.isd'='org.apache.hive.hcatalog.rcfile.RCFileInputDriver','hcat.osd'='org.apache.hive.hcatalog.rcfile.RCFileOutputDriver');
2. copy basic.input.data file into hdfs, here is the content in file:
1 S1S
1 S2S
1 S3S
2 S1S
2 S2S
2 S3S
3 S1S
3 S2S
3 S3S
3. run Pig: pig -useHCatalog
4. grunt> A = load 'basic.input.data' as (a:int, b:chararray);
5. grunt> store A into 'junit_unparted_basic' using
org.apache.hive.hcatalog.pig.HCatStorer();
6. X = load 'junit_unparted_basic' using
org.apache.hive.hcatalog.pig.HCatLoader();
7. grunt> dump X
Error Log:
================================================================================
Pig Stack Trace
---------------
ERROR 2088: Fetch failed. Couldn't retrieve result
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open
iterator for alias X
at org.apache.pig.PigServer.openIterator(PigServer.java:912)
at
org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:752)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:372)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:228)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:203)
at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:66)
at org.apache.pig.Main.run(Main.java:542)
at org.apache.pig.Main.main(Main.java:156)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:94)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:619)
at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: org.apache.pig.PigException: ERROR 1002: Unable to store alias X
at org.apache.pig.PigServer.storeEx(PigServer.java:1015)
at org.apache.pig.PigServer.store(PigServer.java:974)
at org.apache.pig.PigServer.openIterator(PigServer.java:887)
... 12 more
Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 2088:
Fetch failed. Couldn't retrieve result
at
org.apache.pig.backend.hadoop.executionengine.fetch.FetchLauncher.runPipeline(FetchLauncher.java:180)
at
org.apache.pig.backend.hadoop.executionengine.fetch.FetchLauncher.launchPig(FetchLauncher.java:81)
at
org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.launchPig(HExecutionEngine.java:275)
at org.apache.pig.PigServer.launchPlan(PigServer.java:1367)
at
org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1352)
at org.apache.pig.PigServer.storeEx(PigServer.java:1011)
... 14 more
================================================================================
