Maintenance interfaces with sysinv, sm and the vim using http requests.
Request timeout's have an implicit delay between retries. However,
command failures or outright connection failures don't.
This has only become obvious in mtce's communication with the vim
where there appears to be a process startup timing change that leads
to the 'vim' not being ready to handle commands before mtcAgent
startup starts sending them after a platform services group startup
by sm.
This update adds a 10 second http retry wait as a configuration option
to mtc.conf. The mtcAgent loads this value at startup and uses it
in a new HTTP__RETRY_WAIT state of http request work FSM.
The number of retries remains unchanged. This update is only forcing
a minimum wait time between retries, regardless of cause.
Failure path testing was done using Fault Insertion Testing (FIT).
Test Plan:
PASS: Verify the reported issue is resolved by this update.
PASS: Verify http retry config value load on process startup.
PASS: Verify updated value is used over a process -sighup.
PASS: Verify default value if new mtc.conf config value is not found.
PASS: Verify http connection failure http retry handling.
PASS: Verify http request timeout failure retry handling.
PASS: Verify http request operation failure retry handling.
Regression:
PASS: Build and install ISO - Standard and AIO DX.
PASS: Verify http failures do not fail a lock operation.
PASS: Verify host unlock fails if its http done queue shows failures.
PASS: Verify host swact.
PASS: Verify handling of random and persistent http errors involving
the need for retries.
Closes-Bug: 2047958
Change-Id: Icc758b0782be2a4f2882efd56f5de1a8dddea490
Signed-off-by: Eric MacDonald <eric.macdonald@windriver.com>
191c0aa6a8