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2017-12-13Fix issues blocking election handler threadKevin McKiou1-119/+55
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>
2017-11-21Election Handler CleanupKevin McKiou2-6/+6
Under stress, the election handler in feature-active-standby-management may not get a chance to run within the allowed window causing the "watcher" thread to kill it and restart it. The run window is expanded. Also the pdp.updateInterval and pdp.checkInterval parameter values are increased appropriately in the properties file. Issue-ID: POLICY-484 Change-Id: I0c1c2d4fdfbc408be929c56e451b92fc7ad4464a Signed-off-by: Kevin McKiou <km097d@att.com>
2017-09-24Remove sonar blocker and criticalPamela Dragosh4-22/+33
Removed unused import Null pointer exception Does not evaluate to true override hashCode log exception cast long public static final Issue-ID: POLICY-261 Change-Id: I2d90f8503fcc5ed7d13aff31143b8fb69c689e18 Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>
2017-09-21Addition of Active-Standby FeatureKevin McKiou17-0/+2905
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>