Jonathan Hurley created AMBARI-14847:
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Summary: Concurrent kinit Commands Cause Alerts To Randomly Trigger
Key: AMBARI-14847
URL: https://issues.apache.org/jira/browse/AMBARI-14847
Project: Ambari
Issue Type: Bug
Components: ambari-agent
Affects Versions: 2.0.0
Reporter: Jonathan Hurley
Assignee: Jonathan Hurley
Priority: Critical
Fix For: 2.2.2
The alerts framework on each Ambari Agent runs alerts in a threadpool when the
job triggers. This can cause the following error to randomly appear and the
alert to go CRITICAL:
{noformat}
Connection failed to http://nat-rare-21-dvitiiuk-2-5.novalocal:8088 (Execution
of '/usr/bin/kinit -l 5m -c
/var/lib/ambari-agent/tmp/web_alert_cc_f3f99363c3b7d1667f1287ce3a35aa52 -kt
/etc/security/keytabs/spnego.service.keytab
HTTP/[email protected] > /dev/null' returned 1.
kinit: Internal credentials cache error while storing credentials while getting
initial credentials)
{noformat}
The alerts would randomly go CRITICAL at the end of their ticket expiration
time only to become OK again shortly after.
The cause is that the {{kinit}} command being executed to create new
credentials cannot be run concurrently for the same user.
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