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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17448) Export metrics from RecoverableZooKeeper
Date Wed, 11 Jan 2017 23:21:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15819503#comment-15819503

Lars Hofhansl commented on HBASE-17448:

There're also improvements that we can do to the logging of ZK exception. For example ConnectionLoss
is thrown under a variety of conditions and right now we cannot tell why it is being thrown.

> Export metrics from RecoverableZooKeeper
> ----------------------------------------
>                 Key: HBASE-17448
>                 URL: https://issues.apache.org/jira/browse/HBASE-17448
>             Project: HBase
>          Issue Type: Improvement
>          Components: Zookeeper
>            Reporter: Andrew Purtell
> Consider adding instrumentation to RecoverableZooKeeper that exposes metrics on the performance
and health of the embedded ZooKeeper client: latency histograms for each op type, number of
reconnections, number of ops where a reconnection was necessary to proceed, number of failed
ops due to CONNECTIONLOSS, number of failed ops due to SESSIONEXIPRED, number of failed ops
> RecoverableZooKeeper is a class in hbase-client so we can hook up the new metrics to
both client- and server-side metrics reporters. Probably this metrics source should be a process

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