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Posted to dev@hbase.apache.org by "Manukranth Kolloju (JIRA)" <ji...@apache.org> on 2014/09/24 05:09:33 UTC

[jira] [Created] (HBASE-12075) Preemptive Fast Fail

Manukranth Kolloju created HBASE-12075:
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             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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