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https://issues.apache.org/jira/browse/HIVE-28790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HIVE-28790:
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Labels: hive-4.1.0-must pull-request-available (was: hive-4.1.0-must)
> ACID deletes are failing with ArrayIndexOutOfBoundsException when direct
> insert is enabled
> -------------------------------------------------------------------------------------------
>
> Key: HIVE-28790
> URL: https://issues.apache.org/jira/browse/HIVE-28790
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Affects Versions: 4.0.0
> Reporter: Marta Kuczora
> Assignee: Kokila N
> Priority: Major
> Labels: hive-4.1.0-must, pull-request-available
>
> *Steps to reproduce:*
> {code:java}
> set mapreduce.job.reduces=7;
> create external table ext(a int) stored as textfile;
> insert into table ext values(1),(2),(3),(4),(5),(6),(7), (8), (9), (12);
> create table full_acid(a int) stored as orc
> tblproperties("transactional"="true");
> insert into table full_acid select * from ext where a != 3 and a <=7
> group by a;
> insert into table full_acid select * from ext where a>7 group by a;
> set mapreduce.job.reduces=1;
> delete from full_acid where a in (2, 12);
> {code}
> The delete will fail with the following exception:
> {code:java}
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 6
> at
> org.apache.hadoop.hive.ql.exec.FileSinkOperator$FSPaths.closeWriters(FileSinkOperator.java:258)
> {code}
>
> *The problem* is in the FileSinkOperator.createDynamicBucket method:
> {code:java}
> public int createDynamicBucket(int bucketNum) {
> // this assumes all paths are bucket names (which means no lookup is
> needed)
> int writerOffset = bucketNum;
> if (updaters.length <= writerOffset) {
> this.updaters = Arrays.copyOf(updaters, writerOffset + 1);
> this.outPaths = Arrays.copyOf(outPaths, writerOffset + 1);
> this.finalPaths = Arrays.copyOf(finalPaths, writerOffset + 1);
> }
> if (this.finalPaths[writerOffset] == null) {
> if (conf.isDirectInsert()) {
> this.outPathsCommitted = Arrays.copyOf(outPathsCommitted,
> writerOffset + 1);
> this.finalPaths[writerOffset] = buildTmpPath();
> this.outPaths[writerOffset] = buildTmpPath();
> } else {
> // uninitialized bucket
> String bucketName =
> Utilities.replaceTaskIdFromFilename(Utilities.getTaskId(hconf),
> bucketNum);
> this.finalPaths[writerOffset] = new Path(bDynParts ? buildTmpPath()
> : parent, bucketName);
> this.outPaths[writerOffset] = new Path(buildTaskOutputTempPath(),
> bucketName);
> }
> }
> return writerOffset;
> }
> } // class FSPaths
> {code}
> In the first part the updaters, outPaths and finalPaths arrays are copied if
> the writerOffset is not smaller than their length. So these array are
> extended. But in the second part when the outPathsCommitted array is copied,
> the size of the array is not compared with the writerOffset. So it can happen
> that the outPathsCommitted array is reduced. If this situation happens it
> leads to the ArrayIndexOutOfBoundsException when closing the writes, because
> the outPathsCommitted array is shorter than the updaters array.
>
> *About the reproduction:*
> The first insert into the full_acid table creates files with buckets 1, 2, 3,
> 5, 6
> The second insert creates the files with buckets 1, 4, 6
> The bucket number for 6 is 537264128, for 4 is 537133056, so for 4 it is
> smaller than for 6.
> To reproduce the issue, we need to delete a row from bucket 6 and bucket 4
> together and make it so, that both rows are processed by the same
> FileSinkOperator. It will process the row from bucket 6 first, so makes the
> arraycopy in dynamicBucketing with the writerOffset 6. Then comes the row for
> 4 and in the dynamicBucketing it will do the second arrayCopy wrongly. So the
> finalPath array will be size 7, but the outPathsCommitted will be arrayCopied
> to size 4+1. This will cause the exception when closing the writers.
> By setting the reducer number to 1 before the delete, both rows are processed
> by the same FileSinkOperator.
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