From f1aa9fdde74771cded01e1076f7f835849995c29 Mon Sep 17 00:00:00 2001 From: Michael Stack Date: Wed, 11 Apr 2018 15:32:55 -0700 Subject: [PATCH] HBASE-20351 Shell dumps netty properties on startup --- src/main/asciidoc/_chapters/upgrading.adoc | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/src/main/asciidoc/_chapters/upgrading.adoc b/src/main/asciidoc/_chapters/upgrading.adoc index 67c5dbc902..0c7edccecf 100644 --- a/src/main/asciidoc/_chapters/upgrading.adoc +++ b/src/main/asciidoc/_chapters/upgrading.adoc @@ -430,6 +430,18 @@ The following metrics have been added: * 'totalRowActionRequestCount' is a count of region row actions summing reads and writes. +[[upgrade2.0.logging]] +.Changed logging +HBase-2.0.0 now uses link:https://www.slf4j.org/[slf4j] as its logging frontend. +Prevously, we used link:http://logging.apache.org/log4j/1.2/[log4j (1.2)]. +For most the transition should be seamless; slf4j does a good job interpreting +_log4j.properties_ logging configuration files such that you should not notice +any difference in your log system emissions. + +That said, your _log4j.properties_ may need freshening. See link:https://issues.apache.org/jira/browse/HBASE-20351[HBASE-20351] +for example, where a stale log configuration file manifest as netty configuration +being dumped at DEBUG level as preamble on every shell command invocation. + [[upgrade2.0.zkconfig]] .ZooKeeper configs no longer read from zoo.cfg -- 2.16.3