egor-ryashin commented on a change in pull request #6349: maintenance mode for Historical URL: https://github.com/apache/incubator-druid/pull/6349#discussion_r221228735
########## File path: server/src/test/java/org/apache/druid/server/coordinator/DruidCoordinatorBalancerTest.java ########## @@ -195,6 +201,186 @@ public void testMoveToEmptyServerBalancer() Assert.assertEquals(2, params.getCoordinatorStats().getTieredStat("movedCount", "normal")); } + /** + * Server 1 has 2 segments. + * Server 2 (maintenance) has 2 segments. + * Server 3 is empty. + * Maintenance has priority 7. + * Max segments to move is 3. + * 2 (of 2) segments should be moved from Server 2 and 1 (of 2) from Server 1. + */ + @Test + public void testMoveMaintenancePriority() + { + mockDruidServer(druidServer1, "1", "normal", 30L, 100L, ImmutableMap.of(segment1.getIdentifier(), segment1, segment2.getIdentifier(), segment2)); + mockDruidServer(druidServer2, "2", "normal", 30L, 100L, ImmutableMap.of(segment3.getIdentifier(), segment3, segment4.getIdentifier(), segment4)); + mockDruidServer(druidServer3, "3", "normal", 0L, 100L, Collections.emptyMap()); + + EasyMock.replay(druidServer4); + + mockCoordinator(coordinator); + + BalancerStrategy strategy = EasyMock.createMock(BalancerStrategy.class); + EasyMock.expect(strategy.pickSegmentToMove(ImmutableList.of(new ServerHolder(druidServer2, peon2, false)))) + .andReturn(new BalancerSegmentHolder(druidServer2, segment3)) + .andReturn(new BalancerSegmentHolder(druidServer2, segment4)); + EasyMock.expect(strategy.pickSegmentToMove(anyObject())) + .andReturn(new BalancerSegmentHolder(druidServer1, segment1)) + .andReturn(new BalancerSegmentHolder(druidServer1, segment2)); + + EasyMock.expect(strategy.findNewSegmentHomeBalancer(anyObject(), anyObject())).andReturn(new ServerHolder(druidServer3, peon3)).anyTimes(); + replay(strategy); + + DruidCoordinatorRuntimeParams params = defaultRuntimeParamsBuilder( + ImmutableList.of(druidServer1, druidServer2, druidServer3), + ImmutableList.of(peon1, peon2, peon3), + ImmutableList.of(false, true, false) + ) + .withDynamicConfigs( + CoordinatorDynamicConfig.builder() + .withMaxSegmentsToMove( + 3 + ).withMaintenanceModeSegmentsPriority(6).build()// ceil(3 * 0.6) = 2 segments from servers in maintenance + ) + .withBalancerStrategy(strategy) + .build(); + + params = new DruidCoordinatorBalancerTester(coordinator).run(params); + Assert.assertEquals(3L, params.getCoordinatorStats().getTieredStat("movedCount", "normal")); + Assert.assertThat(peon3.getSegmentsToLoad(), is(equalTo(ImmutableSet.of(segment1, segment3, segment4)))); + } + + @Test + public void testZeroMaintenancePriority() + { + DruidCoordinatorRuntimeParams params = setupParamsForMaintenancePriority(0); + params = new DruidCoordinatorBalancerTester(coordinator).run(params); + Assert.assertEquals(1L, params.getCoordinatorStats().getTieredStat("movedCount", "normal")); + Assert.assertThat(peon3.getSegmentsToLoad(), is(equalTo(ImmutableSet.of(segment1)))); + } + + @Test + public void testMaxMaintenancePriority() + { + DruidCoordinatorRuntimeParams params = setupParamsForMaintenancePriority(10); + params = new DruidCoordinatorBalancerTester(coordinator).run(params); + Assert.assertEquals(1L, params.getCoordinatorStats().getTieredStat("movedCount", "normal")); + Assert.assertThat(peon3.getSegmentsToLoad(), is(equalTo(ImmutableSet.of(segment2)))); + } + + /** + * Should balance segments as usual (ignoring priority) with empty maintenanceList. + */ + @Test + public void testMoveMaintenancePriorityWithNoMaintenance() + { + mockDruidServer(druidServer1, "1", "normal", 30L, 100L, ImmutableMap.of(segment1.getIdentifier(), segment1, segment2.getIdentifier(), segment2)); + mockDruidServer(druidServer2, "2", "normal", 0L, 100L, ImmutableMap.of(segment3.getIdentifier(), segment3, segment4.getIdentifier(), segment4)); + mockDruidServer(druidServer3, "3", "normal", 0L, 100L, Collections.emptyMap()); + + EasyMock.replay(druidServer4); + + mockCoordinator(coordinator); + + BalancerStrategy strategy = EasyMock.createMock(BalancerStrategy.class); + EasyMock.expect(strategy.pickSegmentToMove(anyObject())) + .andReturn(new BalancerSegmentHolder(druidServer1, segment1)) + .andReturn(new BalancerSegmentHolder(druidServer1, segment2)) + .andReturn(new BalancerSegmentHolder(druidServer2, segment3)) + .andReturn(new BalancerSegmentHolder(druidServer2, segment4)); + + EasyMock.expect(strategy.findNewSegmentHomeBalancer(anyObject(), anyObject())).andReturn(new ServerHolder(druidServer3, peon3)).anyTimes(); + replay(strategy); + + DruidCoordinatorRuntimeParams params = defaultRuntimeParamsBuilder( + ImmutableList.of(druidServer1, druidServer2, druidServer3), + ImmutableList.of(peon1, peon2, peon3), + ImmutableList.of(false, false, false) + ) + .withDynamicConfigs( + CoordinatorDynamicConfig.builder() Review comment: :white_check_mark: ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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