[jira] [Updated] (HBASE-20665) "Already cached block XXX" message should be DEBUG

["Sean Busbey (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-20665?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Busbey updated HBASE-20665:
--------------------------------
    Status: Patch Available  (was: Open)

> "Already cached block XXX" message should be DEBUG
> --------------------------------------------------
>
>                 Key: HBASE-20665
>                 URL: https://issues.apache.org/jira/browse/HBASE-20665
>             Project: HBase
>          Issue Type: Task
>          Components: BlockCache
>    Affects Versions: 2.0.0, 1.2.0
>            Reporter: Sean Busbey
>            Assignee: Eric Maynard
>            Priority: Minor
>              Labels: beginner
>             Fix For: 3.0.0, 2.1.0, 1.5.0, 1.2.7, 1.3.3, 1.4.5
>
>
> Testing a local cluster that relies on the LruBlockCache for a scan-heavy workload and I'm getting a bunch of log entries at WARN
> {code}
> 2018-05-30 12:28:47,192 WARN org.apache.hadoop.hbase.io.hfile.LruBlockCache: Cached an already cached block: df01f5bf6a244f6bb1a626b927377fff_54780812 cb:df01f5bf6a244f6bb1a626b927377fff_54780812. This is harmless and can happen in rare cases (see HBASE-8547)
> {code}
> As the log message notes (and the code confirms) this is a harmless result of contention for getting a block into the CHM. the message should be at DEBUG.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)