[jira] [Created] (PIG-4816) Read a null scalar causing a Tez failure

["Daniel Dai (JIRA)" <ji...@apache.org>]

Daniel Dai created PIG-4816:
-------------------------------

             Summary: Read a null scalar causing a Tez failure
                 Key: PIG-4816
                 URL: https://issues.apache.org/jira/browse/PIG-4816
             Project: Pig
          Issue Type: Bug
            Reporter: Daniel Dai
            Assignee: Daniel Dai
             Fix For: 0.16.0


The following script fail:
{code}
a = load 'studenttab10k' as (name:chararray, age:int, gpa:double);
b = filter a by age > 100;
c = group b all;
d = foreach c generate COUNT(b.gpa) as count;
e = foreach a generate (d.count IS NOT NULL? d.count : 0l);
dump e;
{code}

Error stack:
{code}
Failure while running task:org.apache.pig.backend.executionengine.ExecException: ERROR 0: java.io.IOException: Please check if you are invoking next() even after it returned false. For usage, please refer to KeyValueReader javadocs
	at org.apache.pig.backend.hadoop.executionengine.tez.plan.udf.ReadScalarsTez.attachInputs(ReadScalarsTez.java:96)
	at org.apache.pig.backend.hadoop.executionengine.tez.runtime.PigProcessor.initializeInputs(PigProcessor.java:295)
	at org.apache.pig.backend.hadoop.executionengine.tez.runtime.PigProcessor.run(PigProcessor.java:183)
	at org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:337)
	at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:179)
	at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:171)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
	at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:171)
	at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:167)
	at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Please check if you are invoking next() even after it returned false. For usage, please refer to KeyValueReader javadocs
	at org.apache.tez.runtime.library.api.KeyValueReader.hasCompletedProcessing(KeyValueReader.java:77)
	at org.apache.tez.runtime.library.common.readers.UnorderedKVReader.moveToNextInput(UnorderedKVReader.java:190)
	at org.apache.tez.runtime.library.common.readers.UnorderedKVReader.next(UnorderedKVReader.java:118)
	at org.apache.pig.backend.hadoop.executionengine.tez.plan.udf.ReadScalarsTez.attachInputs(ReadScalarsTez.java:81)
	... 15 more
{code}




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)