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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-3761) Lots of concurrent table deletes messes up .META. prefetch
Date Mon, 29 Dec 2014 18:52:13 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Elliott Clark resolved HBASE-3761.
----------------------------------
    Resolution: Not a Problem

Client's been re-done and meta now gets changed though different hooks.
I don't think this is applicable anymore. Feel free to open a new task if you see something
like this again.

> Lots of concurrent table deletes messes up .META. prefetch
> ----------------------------------------------------------
>
>                 Key: HBASE-3761
>                 URL: https://issues.apache.org/jira/browse/HBASE-3761
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Priority: Minor
>
> Creating hundreds of tables with hundreds of regions I ran into this issue doing mass
table delete:
> {code}
> 11/04/09 10:26:06 WARN client.HConnectionManager$HConnectionImplementation: Encountered
problems when prefetch META table:
> org.apache.hadoop.hbase.TableNotFoundException: Cannot find row in .META. for table:
bbb_48, row=bbb_48,T�D��iy%��,99999999999999
>         at org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:136)
>         at org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:95)
>         at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.prefetchRegionCache(HConnectionManager.java:648)
>         at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:702)
>         at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:593)
>         at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.relocateRegion(HConnectionManager.java:564)
>         at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getRegionLocation(HConnectionManager.java:415)
>         at org.apache.hadoop.hbase.client.ServerCallable.instantiateServer(ServerCallable.java:57)
>         at org.apache.hadoop.hbase.client.ScannerCallable.instantiateServer(ScannerCallable.java:63)
>         at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getRegionServerWithRetries(HConnectionManager.java:1011)
>         at org.apache.hadoop.hbase.client.HTable$ClientScanner.nextScanner(HTable.java:1077)
>         at org.apache.hadoop.hbase.client.HTable$ClientScanner.initialize(HTable.java:1000)
>         at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:533)
> {code}
> The table was probably removed between start of prefetch scan and next invocation.



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