Change in ovirt-engine[master]: core: do not ping too often

[masayag at redhat.com]

Moti Asayag has submitted this change and it was merged.

Change subject: core: do not ping too often
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core: do not ping too often

Code has a bug causing polling (with FutureVDSCommandType.Poll / ping
verb) too bursty when host is responding fast.

Changes:
1. method waitBetweenPolls is moved from end of method to the start.
When wait is needed, it's the first thing which is done.
2. field lastTimeBeforePoll is introduced. After waiting this field is
set with current time. In next execution, waitBetweenPolls will wait
if requested POLLING_BREAK is not met.
3. in waitBetweenPolls while is introduced, because Thread.sleep does
not guarantee to wait for requested time period, actually it may
sometimes return way sooner than that (see comment in method).

Not that important changes:
4. extracted reading value from task / handling timeouts to single
method for code clarity
5. added trace logging for next time this class misbehaves.

Change-Id: I2569376eae0b67591f669438a9742b34ba7ff568
Signed-off-by: Martin Mucha <mmucha at redhat.com>
---
M backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/network/host/HostSetupNetworkPoller.java
1 file changed, 49 insertions(+), 17 deletions(-)

Approvals:
  Martin Mucha: Verified
  Jenkins CI: Passed CI tests
  Moti Asayag: Looks good to me, approved



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Gerrit-MessageType: merged
Gerrit-Change-Id: I2569376eae0b67591f669438a9742b34ba7ff568
Gerrit-PatchSet: 9
Gerrit-Project: ovirt-engine
Gerrit-Branch: master
Gerrit-Owner: Martin Mucha <mmucha at redhat.com>
Gerrit-Reviewer: Jenkins CI
Gerrit-Reviewer: Marcin Mirecki <mmirecki at redhat.com>
Gerrit-Reviewer: Martin Mucha <mmucha at redhat.com>
Gerrit-Reviewer: Moti Asayag <masayag at redhat.com>
Gerrit-Reviewer: Piotr Kliczewski <piotr.kliczewski at gmail.com>
Gerrit-Reviewer: Yevgeny Zaspitsky <yzaspits at redhat.com>
Gerrit-Reviewer: gerrit-hooks <automation at ovirt.org>