Amit Anand created YARN-3947:
--------------------------------
Summary: Add support for short host names in yarn decommissioning
process
Key: YARN-3947
URL: https://issues.apache.org/jira/browse/YARN-3947
Project: Hadoop YARN
Issue Type: Improvement
Components: resourcemanager
Affects Versions: 2.6.0
Reporter: Amit Anand
Priority: Minor
When running {yarn decommissioning} the {yarn rmadmin -refreshNodes} doesn't
like short host names for the nodes to be decommissioned in {yarn.exclude}
file. It requires {FQDN} for the host name to be present to be able to
successfully decommission a node. The decommissioning behavior in {HDFS} is
different as it can take short host names.
Below are the details of what I am seeing:
My {yarn.exlcude} has short name for the host name:
bcpc-vm1
Running:
{code}
sudo -u yarn yarn rmadmin -refreshNodes
{code}
shows following entries in the log file:
{code}
2015-07-21 11:14:18,795 INFO org.apache.hadoop.conf.Configuration: found
resource yarn-site.xml at file:/etc/hadoop/conf/yarn-site.xml
2015-07-21 11:14:18,802 INFO org.apache.hadoop.util.HostsFileReader: Setting
the includes file to
2015-07-21 11:14:18,802 INFO org.apache.hadoop.util.HostsFileReader: Setting
the excludes file to /etc/hadoop/conf/yarn.exclude
2015-07-21 11:14:18,803 INFO org.apache.hadoop.util.HostsFileReader: Refreshing
hosts (include/exclude) list
2015-07-21 11:14:18,803 INFO org.apache.hadoop.util.HostsFileReader: Adding
bcpc-vm1 to the list of excluded hosts from /etc/hadoop/conf/yarn.exclude
2015-07-21 11:14:18,803 INFO org.apache.hadoop.util.HostsFileReader: Adding
bcpc-vm1 to the list of excluded hosts from /etc/hadoop/conf/yarn.exclude
2015-07-21 11:14:18,803 INFO
org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=yarn
IP=10.0.100.12 OPERATION=refreshNodes TARGET=AdminService RESULT=SUCCESS
{code}
And the node is not decommissioned.
When I add the {FQDN} for the host name the decommissioning works successfully
and I see following in the RM logs:
{code}
2015-07-21 11:14:43,453 INFO org.apache.hadoop.conf.Configuration: found
resource yarn-site.xml at file:/etc/hadoop/conf.LAB-A/yarn-site.xml
2015-07-21 11:14:43,456 INFO org.apache.hadoop.util.HostsFileReader: Setting
the includes file to
2015-07-21 11:14:43,456 INFO org.apache.hadoop.util.HostsFileReader: Setting
the excludes file to /etc/hadoop/conf/yarn.exclude
2015-07-21 11:14:43,456 INFO org.apache.hadoop.util.HostsFileReader: Refreshing
hosts (include/exclude) list
2015-07-21 11:14:43,456 INFO org.apache.hadoop.util.HostsFileReader: Adding
bcpc-vm1.example.com to the list of excluded hosts from
/etc/hadoop/conf/yarn.exclude
2015-07-21 11:14:43,456 INFO
org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=yarn
IP=10.100.0.11 OPERATION=refreshNodes TARGET=AdminService RESULT=SUCCESS
2015-07-21 11:14:44,198 INFO
org.apache.hadoop.yarn.server.resourcemanager.ResourceTrackerService:
Disallowed NodeManager nodeId: bcpc-vm1.example.com:35197 hostname:
bcpc-vm1.example.com:35197
2015-07-21 11:14:44,198 INFO
org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNodeImpl: Deactivating
Node bcpc-vm1.example.com:35197 as it is now DECOMMISSIONED
2015-07-21 11:14:44,199 INFO
org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNodeImpl:
bcpc-vm1.example.com:35197 Node Transitioned from RUNNING to DECOMMISSIONED
2015-07-21 11:14:44,199 INFO
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler:
Removed node bcpc-vm1.example.com:35197 cluster capacity: <memory:618723,
vCores:96>
{code}
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