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This bug tracks the AT&T bug 355533. The symptom was that drools
pdps that were backing each other up were becoming stuck in a
standby state. The cause was that the election handler thread was
being hung by a call to PolicyEngine.manager.deactivate which shuts
down the topic endpoints when the drools pdp operational state
transitions to disabled. Related problems were that the election
handler heartbeat was NOT blocked when the main thread was blocked
and the IntegrityMonitor forward progress counter was NOT blocked
from incrementing when the election handler thread was blocked.
This prevented the correct failover of the drools pdp to another
healthy one. This change fixes the two causes of the thread blockage,
moves the election handler heartbeat to the main thread and adds an
interface (AllSeemsWell) which is called when the election handler
has stalled/resumed. The AllSeemsWell interface will block forward
progress counter increments when ALLNOTWELL and will resume forward
progress counter increments when ALLSEEMSWELL. In addition, it reduces
the run time of the StandbyStateManagementTest from approximately 8
minutes to approximately 2 minutes. Since this changes classes also
changed by POLICY-444, this change must be merged before POLICY-444
can be merged.
Issue-ID: POLICY-501
Change-Id: I7b8180d11077ccf59b21b6484cb58b5522a3df8f
Signed-off-by: Kevin McKiou <km097d@att.com>
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Patch 1:
Removed hostPort and added server.TEST properties from
feature-state-management.properties and modified associated
code in IntegrityMonitor and properties in associated JUnit tests.
Patch 2:
Modified in response to comments from Jorge Hernandez. Including
adding contant usage instead of strings and replacing generic exceptions
with specific exceptions.
Patch 3:
Tied property constants to PolicyProperties. Added default property
contants. Added error/warning log statemeents when something other
than expected value is used. Add logging of all constant values
for inspection in debugging.
Issue-ID: POLICY-369
Change-Id: Ie2218b68761e0338642a2ed28ef840b1b6ece1a4
Signed-off-by: Kevin McKiou <km097d@att.com>
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Patch 1: Adds the active-standby feature to drools-pdp.
This feature provides the state control of the
drools-pdp nodes controlling failover with a site
and across sites. Patch 2: Resolve merge conflict in
packages/install/pom.xml and pom.xml. Patch 3: Resolved
comments from Pamela Dragosh and Jorge Hernandez.
Issue-ID: POLICY-156
Change-Id: I922b3d5d8a464006e9675924bcbc7409d68c08d5
Signed-off-by: Kevin McKiou <km097d@att.com>
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Kevin McKiou