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Varun Saxena commented on YARN-4127: ------------------------------------ In branch-2.7, error message is as under : {noformat} 2015-10-23 09:22:10,209 DEBUG [SyncThread:0] server.DataTree (DataTree.java:processTxn(949)) - Ignoring processTxn failure hdr: -1 : error: -102 2015-10-23 09:22:10,210 DEBUG [main-SendThread(127.0.0.1:11221)] zookeeper.ClientCnxn (ClientCnxn.java:readResponse(818)) - Reading reply sessionid:0x15092d1ebe10001, packet:: clientPath:null serverPath:null finished:false header:: 7591,1 replyHeader:: 7591,7610,-102 request:: '/rmstore/ZKRMStateRoot/RMAppRoot,,v{s{31,s{'world,'anyone}}},0 response:: 2015-10-23 09:22:10,210 INFO [ProcessThread(sid:0 cport:-1):] server.PrepRequestProcessor (PrepRequestProcessor.java:pRequest(645)) - Got user-level KeeperException when processing sessionid:0x15092d1ebe10001 type:create cxid:0x1da8 zxid:0x1dbb txntype:-1 reqpath:n/a Error Path:null Error:KeeperErrorCode = NoAuth {noformat} > RM fail with noAuth error if switched from failover mode to non-failover mode > ------------------------------------------------------------------------------ > > Key: YARN-4127 > URL: https://issues.apache.org/jira/browse/YARN-4127 > Project: Hadoop YARN > Issue Type: Bug > Components: resourcemanager > Affects Versions: 2.7.1 > Reporter: Jian He > Assignee: Varun Saxena > Attachments: YARN-4127.01.patch, YARN-4127.02.patch > > > The scenario is that RM failover was initially enabled, so the zkRootNodeAcl > is by default set with the *RM ID* in the ACL string > If RM failover is then switched to be disabled, it cannot load data from ZK > and fail with noAuth error. After I reset the root node ACL, it again can > access. > {code} > 15/09/08 14:28:34 ERROR resourcemanager.ResourceManager: Failed to > load/recover state > org.apache.zookeeper.KeeperException$NoAuthException: KeeperErrorCode = NoAuth > at org.apache.zookeeper.KeeperException.create(KeeperException.java:113) > at org.apache.zookeeper.ZooKeeper.multiInternal(ZooKeeper.java:949) > at org.apache.zookeeper.ZooKeeper.multi(ZooKeeper.java:915) > at > org.apache.curator.framework.imps.CuratorTransactionImpl.doOperation(CuratorTransactionImpl.java:159) > at > org.apache.curator.framework.imps.CuratorTransactionImpl.access$200(CuratorTransactionImpl.java:44) > at > org.apache.curator.framework.imps.CuratorTransactionImpl$2.call(CuratorTransactionImpl.java:129) > at > org.apache.curator.framework.imps.CuratorTransactionImpl$2.call(CuratorTransactionImpl.java:125) > at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:107) > at > org.apache.curator.framework.imps.CuratorTransactionImpl.commit(CuratorTransactionImpl.java:122) > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore$SafeTransaction.commit(ZKRMStateStore.java:1009) > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore.safeSetData(ZKRMStateStore.java:985) > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore.getAndIncrementEpoch(ZKRMStateStore.java:374) > at > org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceStart(ResourceManager.java:579) > at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193) > at > org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startActiveServices(ResourceManager.java:973) > at > org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1014) > at > org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1010) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:415) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1667) > at > org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.transitionToActive(ResourceManager.java:1010) > at > org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStart(ResourceManager.java:1050) > at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193) > at > org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:1194) > {code} > the problem may be that in non-failover mode, RM doesn't use the *RM-ID* to > connect with ZK and thus fail with no Auth error. > We should be able to switch failover on and off with no interruption to the > user. -- This message was sent by Atlassian JIRA (v6.3.4#6332)