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Posted to dev@phoenix.apache.org by "Chen Feng (JIRA)" <ji...@apache.org> on 2019/04/28 04:06:00 UTC
[jira] [Updated] (PHOENIX-4296) Dead loop in HBase reverse scan
when amount of scan data is greater than SCAN_RESULT_CHUNK_SIZE
[ https://issues.apache.org/jira/browse/PHOENIX-4296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chen Feng updated PHOENIX-4296:
-------------------------------
Attachment: PHOENIX-4296-4.x-HBase-1.2-v3.patch
> Dead loop in HBase reverse scan when amount of scan data is greater than SCAN_RESULT_CHUNK_SIZE
> -----------------------------------------------------------------------------------------------
>
> Key: PHOENIX-4296
> URL: https://issues.apache.org/jira/browse/PHOENIX-4296
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.6.0
> Reporter: rukawakang
> Priority: Major
> Attachments: PHOENIX-4296-4.x-HBase-1.2-v2.patch, PHOENIX-4296-4.x-HBase-1.2-v3.patch, PHOENIX-4296-4.x-HBase-1.2.patch, PHOENIX-4296.patch
>
>
> This problem seems to only occur with reverse scan not forward scan. When amount of scan data is greater than SCAN_RESULT_CHUNK_SIZE(default 2999), Class ChunkedResultIteratorFactory will multiple calls function getResultIterator. But in function getResultIterator it always readjusts startRow, in fact, if in reverse scan we should readjust stopRow. For example
> {code:java}
> if (ScanUtil.isReversed(scan)) {
> scan.setStopRow(ByteUtil.copyKeyBytesIfNecessary(lastKey));
> } else {
> scan.setStartRow(ByteUtil.copyKeyBytesIfNecessary(lastKey));
> }
> {code}
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