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ASF subversion and git services commented on ATLAS-3168: -------------------------------------------------------- Commit 7054e2b1adb928ee9180a71990f1e33a11c77883 in atlas's branch refs/heads/master from Sarath Subramanian [ https://gitbox.apache.org/repos/asf?p=atlas.git;h=7054e2b ] ATLAS-3168: Fix intermittent UT failure: HiveHookIT and ImpalaLineageToolIT #2 > PatchFx: Support for HA Mode > ---------------------------- > > Key: ATLAS-3168 > URL: https://issues.apache.org/jira/browse/ATLAS-3168 > Project: Atlas > Issue Type: Bug > Components: atlas-core > Affects Versions: 2.0.0, trunk > Reporter: Ashutosh Mestry > Assignee: Ashutosh Mestry > Priority: Major > Fix For: 2.0.0, trunk > > Attachments: ATLAS-3168-PatchFx-Fix-for-Startup-in-HA-mode.patch, > ATLAS-3168-PatchFx-Unit-test-fixes-and-optimization.patch > > > *Description* > PatchFx in HA mode causes exceptions. > *Steps to Duplicate* > Deploy latest version of Atlas on a cluster with HA deployment. > Following error appears during startup: > {code:java} > 2019-04-23 03:54:22,280 ERROR - [main-EventThread:] ~ Got exception while > activating (ActiveInstanceElectorService:160) > java.lang.NullPointerException > at > org.apache.atlas.repository.audit.HBaseBasedAuditRepository.createTableIfNotExists(HBaseBasedAuditRepository.java:521) > at > org.apache.atlas.repository.audit.HBaseBasedAuditRepository.instanceIsActive(HBaseBasedAuditRepository.java:627) > at > org.apache.atlas.web.service.ActiveInstanceElectorService.isLeader(ActiveInstanceElectorService.java:154) > at > org.apache.curator.framework.recipes.leader.LeaderLatch$9.apply(LeaderLatch.java:665) > at > org.apache.curator.framework.recipes.leader.LeaderLatch$9.apply(LeaderLatch.java:661) > at > org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:93) > at > org.apache.curator.shaded.com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:435) > at > org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:85) > at > org.apache.curator.framework.recipes.leader.LeaderLatch.setLeadership(LeaderLatch.java:660) > at > org.apache.curator.framework.recipes.leader.LeaderLatch.checkLeadership(LeaderLatch.java:539) > at > org.apache.curator.framework.recipes.leader.LeaderLatch.access$700(LeaderLatch.java:65) > at > org.apache.curator.framework.recipes.leader.LeaderLatch$7.processResult(LeaderLatch.java:590) > at > org.apache.curator.framework.imps.CuratorFrameworkImpl.sendToBackgroundCallback(CuratorFrameworkImpl.java:865) > at > org.apache.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:635) > at > org.apache.curator.framework.imps.WatcherRemovalFacade.processBackgroundOperation(WatcherRemovalFacade.java:152) > at > org.apache.curator.framework.imps.GetChildrenBuilderImpl$2.processResult(GetChildrenBuilderImpl.java:187) > at > org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:602) > at > org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:510) > 2019-04-23 03:54:22,280 WARN - [main-EventThread:] ~ Server instance with > server id id2 is removed as leader (ActiveInstanceElectorService:197) > {code} > *Root Cause* > Pattern followed within Atlas: > * _Service.start_ is called when _Services_ is initialized. > * For every service: > ** Atlas is not in HA mode: Start and perform startup specific actions. > ** Atlas is in HA mode: Start and wait for _instanceIsActive_ to be called. > * _AtlasPatchService_ did not implement _ActiveStateChangeHandler_. > * _AtlasPatchService_ was not registered with > _ActiveStateChangeHandler.HandlerOrder_. > This cause _AtlasPatchService.start_ to perform its job of patching the > database. This happened without _AtlasTypeDefStoreInitializer_ initialized. > This cause exceptions. _ActiveInstanceElectoral_ service got callback from ZK > asking it to call the _instanceIsActive_ method on _HBaseRepositoryService_, > which had not been started. This caused the exception to show the stack trace. > *Solution* > Modify _AtlasPatchService_ to follow the pattern used for other services. -- This message was sent by Atlassian JIRA (v7.6.14#76016)