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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14361) ReplicationSink should create Connection instances lazily
Date Thu, 10 Sep 2015 21:09:46 GMT

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Lars Hofhansl commented on HBASE-14361:
---------------------------------------

Are there threading issues? Can two thread come into the sink and cause the shared connection
to be created? In that case there could be a race and we (a) operate on a partially constructed
object or (b) create two instances.

> ReplicationSink should create Connection instances lazily
> ---------------------------------------------------------
>
>                 Key: HBASE-14361
>                 URL: https://issues.apache.org/jira/browse/HBASE-14361
>             Project: HBase
>          Issue Type: Task
>          Components: Replication
>            Reporter: Nick Dimiduk
>            Assignee: Heng Chen
>             Fix For: 2.0.0, 1.2.0, 1.3.0, 0.98.15, 1.0.3, 1.1.3
>
>         Attachments: HBASE-14361-0.98.patch, HBASE-14361.patch, hmaster.log
>
>
> Over on HBASE-12911 I have a patch that registers Connection instances with the metrics
system. In both standalone server and tll client applications, I was surprised to see multiple
connection objects showing up that are unused. These are pretty heavy objects, including lots
of client threads for the batch pool. We should track these down and remove them -- if they're
not some kind of phantom artifacts of my WIP patch over there.



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