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https://issues.apache.org/jira/browse/HBASE-3852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054616#comment-13054616
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Jean-Daniel Cryans commented on HBASE-3852:
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bq. do you happen to know how many scanners were closed by ScannerCleaner in
the past month ?
I used to print that out but it was really spammy. Probably tens of thousands.
> ThriftServer leaks scanners
> ---------------------------
>
> Key: HBASE-3852
> URL: https://issues.apache.org/jira/browse/HBASE-3852
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.90.2
> Reporter: Jean-Daniel Cryans
> Assignee: Ted Yu
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: 3852.txt
>
>
> The scannerMap in ThriftServer relies on the user to clean it by closing the
> scanner. If that doesn't happen, the ResultScanner will stay in the thrift
> server's memory and if any pre-fetching was done, it will also start
> accumulating Results (with all their data).
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