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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1609) [part of hbase-1583] We wait on leases to expire before regionserver goes down. Rather, just let client fail
Date Fri, 17 Jul 2009 00:07:14 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1609?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-1609:
-------------------------

    Attachment: 1609-v2.patch

This patch cancels leases when next is called and we're going down.

It also just closes all leases in HRS before we run close of all regions.

I don't see why we have to pussy-foot around with Scanners.  They are reading.   If they get
exception in middle of reading, then no big deal.   It looks like Scanners will get UnknownScannerException
if cluster is shutting down on them.  I added javadoc saying this could be one of the reasons
for an USE.

> [part of hbase-1583] We wait on leases to expire before regionserver goes down.  Rather,
just let client fail
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-1609
>                 URL: https://issues.apache.org/jira/browse/HBASE-1609
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: stack
>             Fix For: 0.20.0
>
>         Attachments: 1609-v2.patch, 1609.patch
>
>
> Addressing this issue will help hbase-1583.  We should do for 0.20.0 and perhaps for
0.19.x even.
> Currently, if outstanding leases, in HRegion close, we'll hang until lease expires. 
Could be a minute.  Could be worse, the client might come in and renew the lease a few times
at least till it finishes out the region.  This gets in way of regionserver shutting down
fast.  
> J-D suggests that regionserver should just go down and outstanding clients should fail
rather than try and be nice to outstanding clients (in his case, his MR job had failed so
no clients... but we insist on lease expiring).

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