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From "Bright Fulton (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4508) Backport HBASE-3777 to 0.90 branch
Date Mon, 24 Oct 2011 01:38:32 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bright Fulton updated HBASE-4508:
---------------------------------

    Attachment: HBASE-4508.v5.patch

Remove TestHCM.getValidKeyCount() from patch to avoid ConcurrentModificationException:


testConnectionUniqueness(org.apache.hadoop.hbase.client.TestHCM)  Time elapsed: 1.978 sec
 <<< ERROR!
java.util.ConcurrentModificationException
       at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
       at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:384)
       at java.util.AbstractCollection.toArray(AbstractCollection.java:124)
       at java.util.ArrayList.<init>(ArrayList.java:131)
       at org.apache.hadoop.hbase.client.TestHCM.getValidKeyCount(TestHCM.java:136)
       at org.apache.hadoop.hbase.client.TestHCM.testConnectionUniqueness(TestHCM.java:222)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Based on revision 1188010.

                
> Backport HBASE-3777 to 0.90 branch
> ----------------------------------
>
>                 Key: HBASE-4508
>                 URL: https://issues.apache.org/jira/browse/HBASE-4508
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Assignee: Bright Fulton
>             Fix For: 0.90.5
>
>         Attachments: HBASE-4508.v1.patch, HBASE-4508.v2.patch, HBASE-4508.v3.patch, HBASE-4508.v4.git.patch,
HBASE-4508.v4.patch, HBASE-4508.v5.patch
>
>
> See discussion here: http://search-hadoop.com/m/MJBId1aazTR1/backporting+HBASE-3777+to+0.90&subj=backporting+HBASE+3777+to+0+90
> Rocketfuel has been running 0.90.3 with HBASE-3777 since its resolution.
> They have 10 RS nodes , 1 Master and 1 Zookeeper
> Live writes and reads but super heavy on reads. Cache hit is pretty high.
> The qps on one of their data centers is 50K.

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