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2017-12-13Fix issues blocking election handler threadKevin McKiou4-10/+129
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>
2017-11-02Modify state-management propertiesv1.1.0Kevin McKiou1-1/+7
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>
2017-09-21Addition of Active-Standby FeatureKevin McKiou4-0/+206
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>