Dmytro Grinenko created AMBARI-20670:
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Summary: Node manager start extremely slow when YARN NM local dirs
are very large
Key: AMBARI-20670
URL: https://issues.apache.org/jira/browse/AMBARI-20670
Project: Ambari
Issue Type: Bug
Components: ambari-server
Affects Versions: 2.5.1
Reporter: Dmytro Grinenko
Assignee: Dmytro Grinenko
Priority: Critical
Fix For: trunk, 2.5.1
On the cluster with the YARN NM, where local dirs are 100 GB+ with lot of small
files - NM starts slow with timeouts
Reason could be in this specific call in yarn.py
{code}
def create_local_dir(dir_name):
import params
Directory(dir_name,
create_parents = True,
cd_access="a",
mode=0755,
owner=params.yarn_user,
group=params.user_group,
ignore_failures=True,
recursive_mode_flags = {'f': 'a+rw', 'd': 'a+rwx'},
)
{code}
was taking ~15 minutes per mount.
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