This topic describes the system events of E-MapReduce.
| Type | Event | Description | State | Level |
|---|---|---|---|---|
| Flow | EMR-110401002 | A workflow is completed. | Normal | Info |
| Flow | EMR-110401003 | A workflow is submitted. | Normal | Info |
| Flow | EMR-110401004 | A job is submitted. | Normal | Info |
| Flow | EMR-110401005 | A workflow node is started. | Normal | Info |
| Flow | EMR-110401006 | The status of a workflow node is checked. | Normal | Info |
| Flow | EMR-110401007 | A workflow node is completed. | Normal | Info |
| Flow | EMR-110401008 | A workflow node is stopped. | Normal | Info |
| Flow | EMR-110401009 | A workflow node is canceled. | Normal | Info |
| Flow | EMR-110401010 | A workflow is canceled. | Normal | Info |
| Flow | EMR-110401011 | A workflow is restarted. | Normal | Info |
| Flow | EMR-110401012 | A workflow is resumed. | Normal | Info |
| Flow | EMR-110401013 | A workflow is paused. | Normal | Info |
| Flow | EMR-110401014 | A workflow is stopped. | Normal | Info |
| Flow | EMR-110401015 | A workflow node fails. | Normal | Info |
| Flow | EMR-110401016 | A job fails. | Normal | Info |
| Flow | EMR-210401001 | A workflow fails. | Normal | Info |
| Flow | EMR-210401003 | The startup of a workflow node times out. | Normal | Info |
| Flow | EMR-210401004 | The startup of a job times out. | Normal | Info |
| StatusNotification | StatusCheck | The status of a component is checked. | Failed | Warn |
| Maintenance | Maintenance:HDFS.DataNode.DataTransferPortUnAvailable | The data transmission port of a DataNode is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HDFS.DataNode.ExitUnexpected | A DataNode unexpectedly exits. | Critical | Critical |
| Maintenance | Maintenance:HDFS.DataNode.IpcPortUnAvailable | The IPC port of a DataNode is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HDFS.DataNode.OOM.UnableToCreateNewNativeThread | A DataNode cannot create a native thread due to an Out of Memory (OOM) exception that occurs in the DataNode. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.IpcPortUnAvailable | The IPC port of the NameNode is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.LoadFsImageException | An exception occurs when the NameNode loads FsImage. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.LowAvailableDiskSpaceAndInSafeMode | The NameNode is in safe mode due to insufficient disk space. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.OOM | An OOM exception occurs in the NameNode. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.ResourceLow | The NameNode does not have sufficient resources. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.SyncJournalFailed | The NameNode fails to synchronize logs. | Critical | Critical |
| Maintenance | Maintenance:HDFS.ZKFC.ActiveStandbySwitchOccured | ZFKC triggers the NameNode failover. | Critical | Critical |
| Maintenance | Maintenance:HDFS.ZKFC.TransportLevelExceptionInMonitorHealth | A transport layer exception occurs when ZKFC monitors the health status of the NameNode. | Critical | Critical |
| Maintenance | Maintenance:HDFS.ZKFC.UnableToConnectToQuorum | ZKFC cannot connect to ZooKeeper Quorum. | Critical | Critical |
| Maintenance | Maintenance:HDFS.ZKFC.UnableToStartZKFC | ZKFC cannot be started. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.DataBaseCommunicationLinkFailure | The communication link of the HiveMetaStore database fails. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.DataBaseConnectionFailed | Failed to connect to the HiveMetaStore database. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.DataBaseDiskQuotaUsedup | The HiveMetaStore database runs out of disk space. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.JdbcCommunicationException | A JDC exception occurs in the HiveMetaStore. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.MaxQuestionsExceeded | The number of queries for the HiveMetaStore exceeds the upper limit. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.MaxUpdatesExceeded | The number of updates for the HiveMetaStore exceeds the upper limit. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.MaxUserConnectionExceeded | The number of user connections for the HiveMetaStore exceeds the upper limit. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.OomOccured | An OOM exception occurs in the HiveMetaStore. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.ParseConfError | An error occurs when the HiveMetastore configuration file. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.RequiredTableMissing | The required table of the HiveMetaStore is missing. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.hiveServer2PortUnAvailable | The HIVE.HiveMetaStore.hiveServer2Port is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveServer2.ConnectToZkTimeout | The connection between the HiveServer2 and ZooKeeper times out. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveServer2.ErrorParseConf | An error occurs when the HiveServer2 configuration is parsed. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveServer2.ErrorStartingHiveServer | An error occurs when the HiveServer2 is stated. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveServer2.FailedInitMetaStoreClient | The HiveServer2 fails to initialize the MetaStore client. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveServer2.FailedToConnectToMetaStoreServer | The HiveServer2 fails to connect to the MetaStoreServer. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveServer2.HiveServer2OOM | An OOM exception occurs in the HiveServer2. | Critical | Critical |
| Maintenance | Maintenance:HOST.OomFoundInVarLogMessage | An OOM exception occurs in the host/var/log/message directory. | Critical | Critical |
| Maintenance | Maintenance:SPARK.SparkHistory.OomOccured | An OOM occurs in the SparkHistory. | Critical | Critical |
| Maintenance | Maintenance:YARN.JobHistory.ExitUnExpectedly | The JobHistory service unexpectedly exits. | Critical | Critical |
| Maintenance | Maintenance:YARN.JobHistory.StartingError | An error occurs when the JobHistory service is stat. | Critical | Critical |
| Maintenance | Maintenance:YARN.NodeManager.DeadNodeDetected | One or more dead NodeManagers are detected. | Critical | Critical |
| Maintenance | Maintenance:YARN.NodeManager.OOM | An OOM exception occurs in a NodeManager. | Critical | Critical |
| Maintenance | Maintenance:YARN.NodeManager.StartingError | An error occurs when a NodeManager is started. | Critical | Critical |
| Maintenance | Maintenance:YARN.NodeManager.UnHealthyForDiskFailed | A NodeManager becomes unhealthy due to disk errors. | Critical | Critical |
| Maintenance | Maintenance:YARN.ResourceManager.ErrorInStarting | An error occurs when starting the ResourceManager. | Critical | Critical |
| Maintenance | Maintenance:YARN.ResourceManager.ErrorInTransitionToActiveMode | An error occurs when switching ResourceManager to the Active mode. | Critical | Critical |
| Maintenance | Maintenance:YARN.ResourceManager.ExitUnexpected | The ResourceManager unexpectedly exited. | Critical | Critical |
| Maintenance | Maintenance:YARN.ResourceManager.OOM | An OOM exception occurs in the ResourceManager. | Critical | Critical |
| Maintenance | Maintenance:YARN.ResourceManager.UnkownHostException | An UnkownHostException occurs in the ResourceManager. | Critical | Critical |
| Maintenance | Maintenance:YARN.ResourceManager.ZKRMStateStoreCannotConnectZK | In the YARN service, ZKRMStateStore cannot connect to ZooKeeper. | Critical | Critical |
| Maintenance | Maintenance:YARN.TimelineServer.ErrorInStarting | An error occurs when the TimelineServer. | Critical | Critical |
| Maintenance | Maintenance:YARN.TimelineServer.ExistUnexpectedly | The TimelineServer unexpectedly exits. | Critical | Critical |
| Maintenance | Maintenance:ZOOKEEPER.UnableToRunQuorumServer | The ZooKeeper cannot run QuorumServer. | Critical | Critical |
| Maintenance | Agent:Maintenance.EcmAgentTimeout | The EcmAgent remains disconnected for a long time. | Critical | Critical |
| Maintenance | Maintenance:ZOOKEEPER.LeaderPortUnAvailable | The LeaderPort of Zookeeper is unavailable. | Critical | Critical |
| Maintenance | Maintenance:ZOOKEEPER.ClientPortUnAvailable | The ClientPort of Zookeeper is unavailable. | Critical | Critical |
| Maintenance | Maintenance:YARN.NodeManager.UnHealthyNodesExist | One or more unhealthy nodes exist in YARN. | Critical | Critical |
| Maintenance | Maintenance:YARN.ResourceManager.ActiveStandbySwitch | A failover occurs in the ResourceManager. | Critical | Critical |
| Maintenance | Maintenance:YARN.ResourceManager.PortUnAvailable | The service port of the ResourceManager is unavailable. | Critical | Critical |
| Maintenance | Maintenance:STORM.Nimbus.ThriftPortUnAvailable | The STORM.Nimbus.ThriftPort is unavailable. | Critical | Critical |
| Exception | Agent:EcmAgentHeartbeatExpired | The heartbeat message of EcmAgent expires. | Critical | Critical |
| Maintenance | Maintenance:HDFS.DataNode.FailueVolumes | One or more damaged disks exist in the DataNode. | Critical | Critical |
| Maintenance | Maintenance:HDFS.JournalNode.RpcPortUnAvailable | The RPC port of the JournalNode is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.ActiveStandbySwitch | A failover occurs in the NameNode. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.BlockCapacityNearUsedUp | The block capacity of the NameNode is running out. | Critical | Critical |
| Maintenance | Maintenance:HBASE.HMaster.IpcPortUnAvailable | The IPC port of the HBASE.HMaster is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HBASE.HRegionServer.IpcPortUnAvailable | The IPC port of the HBASE.HRegionServer is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HBASE.ThriftServer.ServicePortUnAvailable | The service port of the HBASE.ThriftServer is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HUE.OozieAdminPortUnAvailable | The management port of Oozie is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HUE.PortUnAvailable | The service port of HUE is unavailable. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.InSafeMode | The NameNode remains in security mode for a long time. | Critical | Critical |
| Maintenance | Maintenance:HDFS.NameNode.MissingBlock | Data block is missing in HDFS. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveMetaStore.PortUnAvailable | The port of the HIVE.HiveMetaStore is unavailable. | Critical | Critical |
| Scaling | Scaling:ScalingActivity:Failed | The auto scaling fails. | Normal | Critical |
| Scaling | Scaling:ScalingActivity:Timeout | The auto scaling times out. | Normal | Critical |
| Scaling | Scaling:ScalingActivity:Rejected | The auto scaling is rejected. | Normal | Critical |
| Maintenance | Maintenance:HOST.HighMemoryUsage | The memory usage is high. | Critical | Critical |
| Maintenance | Maintenance:HOST.LowDiskForMntDisk | The available space of /mnt/disk1 is too low. | Critical | Critical |
| Maintenance | Maintenance:HOST.LowRootfsDisk | The disk space available for the root file system is too low. | Critical | Critical |
| Maintenance | Maintenance:HIVE.HiveServer2.CannotConnectByAnyURIsProvided | Unable to connect to HiveServer2 by using the provided URIs. | Critical | Critical |