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https://issues.apache.org/jira/browse/HBASE-12075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16424697#comment-16424697
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stack commented on HBASE-12075:
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This was committed without a JIRA ID:
commit ece933fa3e272531ee443265c7aef7326e89e7cd
Author: manukranthk <[email protected]>
Date: Tue Sep 23 19:15:09 2014 -0700
Implement Preemptive Fast Fail
Summary: This diff ports the Preemptive Fast Fail feature to OSS. 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.
Test Plan: Unit tests
Differential Revision: https://reviews.facebook.net/D24177
Signed-off-by: stack <[email protected]>
> Preemptive Fast Fail
> --------------------
>
> Key: HBASE-12075
> URL: https://issues.apache.org/jira/browse/HBASE-12075
> Project: HBase
> Issue Type: Sub-task
> Components: Client
> Affects Versions: 0.99.0, 0.98.6.1, 2.0.0
> Reporter: Manukranth Kolloju
> Assignee: Manukranth Kolloju
> Priority: Major
> Fix For: 0.99.2, 2.0.0
>
> Attachments: 0001-Add-a-test-case-for-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> HBASE-12075-Preemptive-Fast-Fail-V15.patch
>
>
> 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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