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From "Kirubakaran Pakkirisamy (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-9410) Concurrent coprocessor endpoint executions slow down exponentially
Date Sun, 01 Sep 2013 16:40:51 GMT

     [ https://issues.apache.org/jira/browse/HBASE-9410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kirubakaran Pakkirisamy updated HBASE-9410:
-------------------------------------------

    Attachment: SearchProtocol.java
                SearchEndpoint.java
                Search.java

Attached files which demonstrate the problem. The Thread.sleep in the client allows for clients
to have created the HTable. It then loops for say, 50 times. What is usually 10-20msec suddenly
jumps to few hundreds and some in thousands. This is with 32 conncurrent connections to a
4 node ec2 cluster with 32 cores in total
                
> Concurrent coprocessor endpoint executions slow down exponentially
> ------------------------------------------------------------------
>
>                 Key: HBASE-9410
>                 URL: https://issues.apache.org/jira/browse/HBASE-9410
>             Project: HBase
>          Issue Type: Bug
>          Components: Coprocessors
>    Affects Versions: 0.94.11
>         Environment: Amazon ec2
>            Reporter: Kirubakaran Pakkirisamy
>         Attachments: SearchEndpoint.java, Search.java, SearchProtocol.java
>
>
> Multiple concurrent executions of coprocessor endpoints slow down drastically. It is
compounded further when there are more Htable connection setups happening.

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