Lei Chen created HBASE-21706:
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Summary: Inconsistency of fs.defaultFS between active and standby
masters
Key: HBASE-21706
URL: https://issues.apache.org/jira/browse/HBASE-21706
Project: HBase
Issue Type: Bug
Components: conf, master
Affects Versions: 1.1.2
Reporter: Lei Chen
I'm using HDP-2.3.6.22-1 with HBase HA configured. I noticed that active and
standby masters have different `fs.defaultFS` on their /conf pages.
Given `fs.defaultFS` is set to <scheme>:<authority> and `hbase.rootdir` is set
to <scheme>:<authority>/<root-dir> in core-site.xml on all the hosts, it looks
like standby masters has `fs.defaultFS` programatically set to the same value
as `hbase.rootdir`.
For example, on a 3 heads cluster DEV-CLUSTER, my active master has the
following line on the /conf page
{code:java}
<property><name>fs.defaultFS</name><value>hdfs://DEV-CLUSTER</value><source>programatically</source></property>
{code}
but standby masters has
{code:java}
<property><name>fs.defaultFS</name><value>hdfs://DEV-CLUSTER/hbase-root</value><source>programatically</source></property>{code}
Please correct me if this is not a bug but a feature, but I find this behavior
surprising plus I cannot locate any related document.
>From a quick looking at the code, the cause seems to be that standby masters
>got the property set in
>[HRegionServer.java|https://github.com/hortonworks/hbase-release/blob/HDP-2.6.3.22-tag/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java#L649-L652],
> and active master got it set in a different way in
>[MasterFileSystem.java|https://github.com/hortonworks/hbase-release/blob/HDP-2.6.3.22-tag/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java#L132-L137].
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