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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3852) ThriftServer leaks scanners
Date Fri, 24 Jun 2011 18:33:47 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054616#comment-13054616
] 

Jean-Daniel Cryans commented on HBASE-3852:
-------------------------------------------

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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