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https://issues.apache.org/jira/browse/HBASE-18019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16015638#comment-16015638
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Hudson commented on HBASE-18019:
--------------------------------
SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #3032 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/3032/])
HBASE-18019 Close redundant memstore scanners (chia7712: rev
32d2062b5ccfbdb3630a9fceee98200d36a5c885)
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStore.java
> Close redundant memstore scanners
> ---------------------------------
>
> Key: HBASE-18019
> URL: https://issues.apache.org/jira/browse/HBASE-18019
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 2.0.0
> Reporter: Chia-Ping Tsai
> Assignee: Chia-Ping Tsai
> Fix For: 2.0.0
>
> Attachments: HBASE-18019.v0.patch, HBASE-18019.v1.patch
>
>
> The HBASE-17655 remove the MemStoreScanner and it causes that the
> MemStore#getScanner(readpt) returns multi KeyValueScanner which consist of
> active, snapshot and pipeline. But StoreScanner only remove one mem scanner
> when refreshing current scanners.
> {code}
> for (int i = 0; i < currentScanners.size(); i++) {
> if (!currentScanners.get(i).isFileScanner()) {
> currentScanners.remove(i);
> break;
> }
> }
> {code}
> The older scanners kept in the StoreScanner will hinder GC from releasing
> memory and lead to multiple scans on the same data.
>
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