Yingyi Zhang

``` com.github.ambry.account.HelixAccountServiceTest > testSelectInactiveContainer[0] FAILED com.github.ambry.account.AccountServiceException: Input accounts conflict with the accounts in local cache at com.github.ambry.account.HelixAccountService.updateAccountsWithAccountMetadataStore(HelixAccountService.java:295) at com.github.ambry.account.HelixAccountService.updateAccounts(HelixAccountService.java:261) at com.github.ambry.account.HelixAccountServiceTest.updateAccountsAndAssertAccountExistence(HelixAccountServiceTest.java:1186) at com.github.ambry.account.HelixAccountServiceTest.testSelectInactiveContainer(HelixAccountServiceTest.java:249) ```

``` com.github.ambry.network.http2.AmbrySendToHttp2AdaptorTest > testServerWrite FAILED java.lang.AssertionError: HeapMemoryLeak: [allocation|deallocation] before test[280|279], after test[281|281] expected: but was: at org.junit.Assert.fail(Assert.java:91) at org.junit.Assert.failNotEquals(Assert.java:645) at org.junit.Assert.assertEquals(Assert.java:126) at org.junit.Assert.assertEquals(Assert.java:470) at com.github.ambry.utils.NettyByteBufLeakHelper.afterTest(NettyByteBufLeakHelper.java:103) at com.github.ambry.network.http2.AmbrySendToHttp2AdaptorTest.after(AmbrySendToHttp2AdaptorTest.java:45) ```

Test failure: com.github.ambry.router.PutManagerTest > testOptionsFailures[2] FAILED

1

``` com.github.ambry.router.PutManagerTest > testOptionsFailures[2] FAILED java.lang.AssertionError: HeapMemoryLeak: [allocation|deallocation] before test[29774|29758], after test[29779|29762] expected: but was: at org.junit.Assert.fail(Assert.java:91) at org.junit.Assert.failNotEquals(Assert.java:645) at org.junit.Assert.assertEquals(Assert.java:126) at org.junit.Assert.assertEquals(Assert.java:470) at com.github.ambry.utils.NettyByteBufLeakHelper.afterTest(NettyByteBufLeakHelper.java:96) at com.github.ambry.router.PutManagerTest.postCheck(PutManagerTest.java:170) ```

``` com.github.ambry.network.SelectorTest > testEmptyRequest[1] FAILED java.lang.AssertionError: HeapMemoryLeak: [allocation|deallocation] before test[10042|10040], after test[10046|10043] expected: but was: at org.junit.Assert.fail(Assert.java:91) at org.junit.Assert.failNotEquals(Assert.java:645) at org.junit.Assert.assertEquals(Assert.java:126) at org.junit.Assert.assertEquals(Assert.java:470) at com.github.ambry.utils.NettyByteBufLeakHelper.afterTest(NettyByteBufLeakHelper.java:94) at com.github.ambry.network.SelectorTest.after(SelectorTest.java:58) ```

Currently the stats aggregation relies on HelixParticipant and sort of depends on same ZKHelixManager. A separate ClusterParticipant and an independent ZKHelixManager could be set up for stats aggregation. Thus, stats...

Avoid duplicate info about Hostname and Port in ClusterMapConfig and NetworkConfig

1

The hostname and port are currently recorded in ClusterMapConfig and NetworkConfig. We are supposed to avoid the duplicate information in two places for safety concerns. Maybe we can remove the...