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https://issues.apache.org/jira/browse/HIVE-18786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16524365#comment-16524365
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Dongwook Kwon commented on HIVE-18786:
--------------------------------------
>From my investigation, this bug was introduced by
>[HIVE-15520||https://issues.apache.org/jira/browse/HIVE-15520]
[https://github.com/apache/hive/blob/rel/release-2.3.3/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFEvaluator.java#L294-L296]
Above code works well as long as JVM isn't reused. however when Tez reuse
container, partitionEvaluator has null blockInfos which cleaned by previous
use.
I believe my patch will fix this issue for Tez, could someone review it.
> NPE in Hive windowing functions
> -------------------------------
>
> Key: HIVE-18786
> URL: https://issues.apache.org/jira/browse/HIVE-18786
> Project: Hive
> Issue Type: Bug
> Affects Versions: 2.3.2
> Reporter: Michael Bieniosek
> Priority: Critical
>
> When I run a Hive query with windowing functions, if there's enough data I
> get an NPE.
> For example something like this query might break:
> select id, created_date, max(created_date) over (partition by id)
> latest_created_any from ...
> The only workaround I've found is to remove the windowing functions entirely.
> The stacktrace looks suspiciously similar to +HIVE-15278+, but I'm in
> hive-2.3.2 which appears to have the bugfix applied.
>
> Caused by: java.lang.RuntimeException:
> org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while
> processing row (tag=0) <some row data here>
> at
> org.apache.hadoop.hive.ql.exec.tez.ReduceRecordSource.pushRecord(ReduceRecordSource.java:297)
> at
> org.apache.hadoop.hive.ql.exec.tez.ReduceRecordProcessor.run(ReduceRecordProcessor.java:317)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:185)
> ... 14 more
> Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime
> Error while processing row (tag=0) <some row data here>
> at
> org.apache.hadoop.hive.ql.exec.tez.ReduceRecordSource$GroupIterator.next(ReduceRecordSource.java:365)
> at
> org.apache.hadoop.hive.ql.exec.tez.ReduceRecordSource.pushRecord(ReduceRecordSource.java:287)
> ... 16 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.exec.persistence.PTFRowContainer.first(PTFRowContainer.java:115)
> at
> org.apache.hadoop.hive.ql.exec.PTFPartition.iterator(PTFPartition.java:114)
> at
> org.apache.hadoop.hive.ql.udf.ptf.BasePartitionEvaluator.getPartitionAgg(BasePartitionEvaluator.java:200)
> at
> org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction.evaluateFunctionOnPartition(WindowingTableFunction.java:155)
> at
> org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction.iterator(WindowingTableFunction.java:538)
> at
> org.apache.hadoop.hive.ql.exec.PTFOperator$PTFInvocation.finishPartition(PTFOperator.java:349)
> at
> org.apache.hadoop.hive.ql.exec.PTFOperator.process(PTFOperator.java:123)
> at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:897)
> at
> org.apache.hadoop.hive.ql.exec.SelectOperator.process(SelectOperator.java:95)
> at
> org.apache.hadoop.hive.ql.exec.tez.ReduceRecordSource$GroupIterator.next(ReduceRecordSource.java:356)
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