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From "Manukranth Kolloju (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12075) Preemptive Fast Fail
Date Wed, 24 Sep 2014 03:09:33 GMT
Manukranth Kolloju created HBASE-12075:

             Summary: Preemptive Fast Fail
                 Key: HBASE-12075
                 URL: https://issues.apache.org/jira/browse/HBASE-12075
             Project: HBase
          Issue Type: New Feature
          Components: Client
    Affects Versions: 1.0.0
            Reporter: Manukranth Kolloju
            Assignee: Manukranth Kolloju
             Fix For: 1.0.0

In multi threaded clients, we use a feature developed on 0.89-fb branch called Preemptive
Fast Fail. This allows the client threads which would potentially fail, fail fast. The idea
behind this feature is that we allow, among the hundreds of client threads, one thread to
try and establish connection with the regionserver and if that succeeds, we mark it as a live
node again. Meanwhile, other threads which are trying to establish connection to the same
server would ideally go into the timeouts which is effectively unfruitful. We can in those
cases return appropriate exceptions to those clients instead of letting them retry.

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