5.12.1.1. Potential causes
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Hortonworks Data Platform
5.12.1.1. Potential causes
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1. Introducing Ambari Web
1. Cluster Monitoring Sources
2. Architecture
2.1. Sessions
3. Starting and Accessing Ambari Web
2. Navigating Ambari Web for Hadoop 2.x
1. The Navigation Header
2. The Dashboard View
2.1. The Widget Version
2.1.1. Services Summary
2.1.2. Cluster Status and Metrics
2.2. The Classic Version
2.2.1. Services Summary
2.2.2. Cluster Metrics
3. The Heatmaps View
4. The Services View
4.1. Services Navigation
4.2. Services Summary
4.3. Configs
4.4. Quick Links
4.5. Alerts and Health Checks
4.6. Management Header
4.7. Metrics
5. The Hosts View
5.1. Host Details
5.2. Add Hosts
6. Admin View
6.1. Managing Ambari Web Users
6.2. Setting Up NameNode High Availabilty
6.2.1. Rolling Back NameNode HA
6.2.1.1. Stop HBase
6.2.1.2. Checkpoint the Active NameNode
6.2.1.3. Stop All Services
6.2.1.4. Prepare the Ambari Server Host for Rollback
6.2.1.5. Restore the HBase Configuration
6.2.1.6. Delete ZK Failover Controllers
6.2.1.7. Modify HDFS Configurations
6.2.1.8. Recreate the Secondary NameNode
6.2.1.9. Re-enable the Secondary NameNode
6.2.1.10. Delete All JournalNodes
6.2.1.11. Delete the Additional NameNode
6.2.1.12. Verify your HDFS Components
6.2.1.13. Start HDFS
6.3. Enabling Kerberos Security
6.4. Checking Stack and Component Versions
6.5. Checking Service User Accounts and Groups
3. Navigating Ambari Web for Hadoop 1.x
1. The Navigation Header
2. The Dashboard View
2.1. The Widget Version
2.1.1. Services Summary
2.1.2. Cluster Status and Metrics
2.2. The Classic Version
2.2.1. Services Summary
2.2.2. Cluster Metrics
3. The Heatmaps View
4. The Services View
4.1. Services Navigation
4.2. Services Summary
4.3. Configs
4.4. Quick Links
4.5. Alerts and Health Checks
4.6. Management Header
4.7. Metrics
5. The Hosts View
5.1. Host Details
5.2. Add Hosts
6. The Jobs View
6.1. Browsing Jobs
6.2. Using Job Charts
7. Admin View
7.1. Managing Ambari Web Users
7.2. Enabling Kerberos Security
7.3. Checking Stack and Component Versions
7.4.
4. Using Nagios With Hadoop
1. Basic Nagios Architecture
2. Installing Nagios
3. Configuration File Locations
4. Configuring Nagios Alerts For Hadoop Services
5. Nagios Alerts For Hadoop Services
5.1. HDFS Service Alerts
5.1.1. Blocks health
5.1.1.1. Potential causes
5.1.1.2. Possible remedies
5.1.2. NameNode process
5.1.2.1. Potential causes
5.1.2.2. Possible remedies
5.1.3. DataNode space
5.1.3.1. Potential causes
5.1.3.2. Possible remedies
5.1.4. DataNode process
5.1.4.1. Potential causes
5.1.4.2. Possible remedies
5.1.5. NameNode host CPU utilization
5.1.5.1. Potential causes
5.1.5.2. Possible remedies
5.1.6. NameNode edit logs directory status
5.1.6.1. Potential causes
5.1.6.2. Possible remedies
5.1.7. NameNode Web UI
5.1.7.1. Potential causes
5.1.7.2. Possible remedies
5.1.8. Percent DataNodes with space available
5.1.8.1. Potential causes
5.1.8.2. Possible remedies
5.1.9. Percent DataNodes live
5.1.9.1. Potential causes
5.1.9.2. Possible remedies
5.1.10. NameNode RPC latency
5.1.10.1. Potential causes
5.1.10.2. Possible remedies
5.1.11. HDFS capacity utilization
5.1.11.1. Potential causes
5.1.11.2. Possible remedies
5.2. NameNode HA Alerts (Hadoop 2 only)
5.2.1. JournalNode process
5.2.1.1. Potential causes
5.2.1.2. Possible remedies
5.2.2. NameNode HA Healthy process
5.2.2.1. Potential causes
5.2.2.2. Possible remedies
5.3. YARN Alerts (Hadoop 2 only)
5.3.1. ResourceManager process
5.3.1.1. Potential causes
5.3.1.2. Possible remedies
5.3.2. Percent NodeManagers live
5.3.2.1. Potential causes
5.3.2.2. Possible remedies
5.3.3. ResourceManager Web UI
5.3.3.1. Potential causes
5.3.3.2. Possible remedies
5.3.4. ResourceManager RPC latency
5.3.4.1. Potential causes
5.3.4.2. Possible remedies
5.3.5. ResourceManager CPU utilization
5.3.5.1. Potential causes
5.3.5.2. Possible remedies
5.3.6. NodeManager process
5.3.6.1. Potential causes
5.3.6.2. Possible remedies
5.3.7. NodeManager health
5.3.7.1. Potential causes
5.3.7.2. Possible remedies
5.4. MapReduce2 Alerts (Hadoop 2 only)
5.4.1. HistoryServer Web UI
5.4.1.1. Potential causes
5.4.1.2. Possible remedies
5.4.2. HistoryServer RPC latency
5.4.2.1. Potential causes
5.4.2.2. Possible remedies
5.4.3. HistoryServer CPU utilization
5.4.3.1. Potential causes
5.4.3.2. Possible remedies
5.4.4. HistoryServer process
5.4.4.1. Potential causes
5.4.4.2. Possible remedies
5.5. MapReduce Service Alerts (Hadoop 1 only)
5.5.1. JobTracker RPC latency alert
5.5.1.1. Potential causes
5.5.1.2. Possible remedies
5.5.2. JobTracker process
5.5.2.1. Potential causes
5.5.2.2. Possible remedies
5.5.3. JobTracker Web UI
5.5.3.1. Potential causes
5.5.3.2. Possible remedies
5.5.4. JobTracker CPU utilization
5.5.4.1. Potential causes
5.5.4.2. Possible remedies
5.5.5. HistoryServer Web UI
5.5.5.1. Potential causes
5.5.5.2. Possible remedies
5.5.6. HistoryServer process
5.5.6.1. Potential causes
5.5.6.2. Possible remedies
5.6. HBase Service Alerts
5.6.1. Percent RegionServers live
5.6.1.1. Potential causes
5.6.1.2. Possible remedies
5.6.2. HBase Master process
5.6.2.1. Potential causes
5.6.2.2. Possible remedies
5.6.3. HBase Master Web UI
5.6.3.1. Potential causes
5.6.3.2. Possible remedies
5.6.4. HBase Master CPU utilization
5.6.4.1. Potential causes
5.6.4.2. Possible remedies
5.6.5. RegionServer process
5.6.5.1. Potential causes
5.6.5.2. Possible remedies
5.7. Hive Alerts
5.7.1. Hive-Metastore status
5.7.1.1. Potential causes
5.7.1.2. Possible remedies
5.8. WebHCat Alerts
5.8.1. WebHCat Server status
5.8.1.1. Potential causes
5.8.1.2. Possible remedies
5.9. Oozie Alerts
5.9.1. Oozie status
5.9.1.1. Potential causes
5.9.1.2. Possible remedies
5.10. Ganglia Alerts
5.10.1. Ganglia Server status
5.10.1.1. Potential causes
5.10.1.2. Possible remedies
5.10.2. Ganglia Monitor process
5.10.2.1. Potential causes
5.10.2.2. Possible remedies
5.11. Nagios Alerts
5.11.1. Nagios status log freshness
5.11.1.1. Potential causes
5.11.1.2. Possible remedies
5.12. ZooKeeper Alerts
5.12.1. Percent ZooKeeper servers live
5.12.1.1. Potential causes
5.12.1.2. Possible remedies
5.12.2. Zookeeper Server process
5.12.2.1. Potential causes
5.12.2.2. Possible remedies
5.13. Ambari Alerts
5.13.1. Ambari Agent process.
5.13.1.1. Potential causes
5.13.1.2. Possible remedies
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