RegionServer Health Tests
RegionServer Audit Pipeline Test
This RegionServer health test checks that the Auditing for the RegionServer role is getting processed correctly and is not blocked. A failure of this health test may indicate a problem with the audit pipeline of RegionServer process. This test can fail either because the Cloudera Audit Server is not accepting audits, or the Cloudera Manager Agent on the RegionServer host isn't able to send audits because of some network issue. Check the Cloudera Manager Agent logs and Cloudera Audit Server logs for more details. This test can be enabled or disabled using the Navigator Audit Pipeline Health Check RegionServer monitoring setting.
Short Name: Audit Pipeline Test
Monitoring Period For Audit Failures
- Description
- The period to review when checking if audits are blocked and not getting processed.
- Template Name
- mgmt_navigator_failure_window
- Default Value
- 20
- Unit(s)
- MINUTES
Navigator Audit Failure Thresholds
- Description
- The health test thresholds for failures encountered when monitoring audits within a recent period specified by the mgmt_navigator_failure_window configuration for the role. The value that can be specified for this threshold is the number of bytes of audits data that is left to be sent to audit server.
- Template Name
- mgmt_navigator_failure_thresholds
- Default Value
- critical:any, warning:never
- Unit(s)
- BYTES
Navigator Audit Pipeline Health Check
- Description
- Enable test of audit events processing pipeline. This will test if audit events are not getting processed by Audit Server for a role that generates audit.
- Template Name
- mgmt_navigator_status_check_enabled
- Default Value
- true
- Unit(s)
- no unit
RegionServer Cluster Connectivity
This is a RegionServer health test that checks whether the Master considers the RegionServer alive. A failure of this health test may indicate that the RegionServer is having trouble communicating with at least the HBase Master and possibly the entire HBase cluster. Look in the RegionServer logs for more details. This test can be enabled or disabled using the HBase RegionServer to Master Connectivity Test RegionServer monitoring setting. The HBase Region Server Connectivity Tolerance at Startup RegionServer monitoring setting and the Health Test Startup Tolerance Master monitoring setting can be used to control the test's tolerance windows around RegionServer and Master restarts respectively.
Short Name: Cluster Connectivity
HBase Region Server Connectivity Tolerance at Startup
- Description
- The amount of time to wait for the HBase Region Server to fully start up and connect to the HBase Master before enforcing the connectivity check.
- Template Name
- regionserver_connectivity_tolerance
- Default Value
- 180
- Unit(s)
- SECONDS
HBase RegionServer to Master Connectivity Test
- Description
- Enables the health test that the RegionServer is connected to the Master
- Template Name
- regionserver_master_connectivity_enabled
- Default Value
- true
- Unit(s)
- no unit
Health Test Startup Tolerance
- Description
- The amount of time allowed after this role is started that failures of health tests that rely on communication with this role will be tolerated.
- Template Name
- master_startup_tolerance
- Default Value
- 5
- Unit(s)
- MINUTES
RegionServer Compaction Queue Size
This is a RegionServer health test that checks that a moving average of the size of the RegionServer's compaction queue does not exceed some value. A failure of this health test indicates a high write load on the RegionServer. Try reducing the write load on the RegionServer, increasing capacity by adding additional disks to the RegionServer, or adding additional RegionServers. This test can be configured using the HBase RegionServer Compaction Queue Monitoring Thresholds and HBase RegionServer Compaction Queue Monitoring Period RegionServer monitoring settings.
Short Name: Compaction Queue Size
HBase RegionServer Compaction Queue Monitoring Period
- Description
- The period over which to compute the moving average of the compaction queue size.
- Template Name
- regionserver_compaction_queue_window
- Default Value
- 5
- Unit(s)
- MINUTES
HBase RegionServer Compaction Queue Monitoring Thresholds
- Description
- The health test thresholds of the weighted average size of the HBase RegionServer compaction queue over a recent period. See HBase RegionServer Compaction Queue Monitoring Period.
- Template Name
- regionserver_compaction_queue_thresholds
- Default Value
- critical:never, warning:10.0
- Unit(s)
- no unit
RegionServer File Descriptors
This RegionServer health test checks that the number of file descriptors used does not rise above some percentage of the RegionServer file descriptor limit. A failure of this health test may indicate a bug in either Hadoop or Cloudera Manager. Contact Cloudera support. This test can be configured using the File Descriptor Monitoring Thresholds RegionServer monitoring setting.
Short Name: File Descriptors
File Descriptor Monitoring Thresholds
- Description
- The health test thresholds of the number of file descriptors used. Specified as a percentage of file descriptor limit.
- Template Name
- regionserver_fd_thresholds
- Default Value
- critical:70.0, warning:50.0
- Unit(s)
- PERCENT
RegionServer Flush Queue Size
This is a RegionServer health test that checks that a moving average of the size of the RegionServer's flush queue does not exceed some value. A failure of this health test indicates a high write load on the RegionServer. Try reducing the write load on the RegionServer, increasing capacity by adding additional disks to the RegionServer, or adding additional RegionServers. This test can be configured using the HBase RegionServer Flush Queue Monitoring Thresholds and HBase RegionServer Flush Queue Monitoring Period RegionServer monitoring settings.
Short Name: Flush Queue Size
HBase RegionServer Flush Queue Monitoring Period
- Description
- The period over which to compute the moving average of the flush queue size.
- Template Name
- regionserver_flush_queue_window
- Default Value
- 5
- Unit(s)
- MINUTES
HBase RegionServer Flush Queue Monitoring Thresholds
- Description
- The health test thresholds of the average size of the HBase RegionServer flush queue over a recent period. See HBase RegionServer Flush Queue Monitoring Period.
- Template Name
- regionserver_flush_queue_thresholds
- Default Value
- critical:never, warning:10.0
- Unit(s)
- no unit
RegionServer GC Duration
This RegionServer health test checks that the RegionServer is not spending too much time performing Java garbage collection. It checks that no more than some percentage of recent time is spent performing Java garbage collection. A failure of this health test may indicate a capacity planning problem or misconfiguration of the RegionServer. This test can be configured using the Garbage Collection Duration Thresholds and Garbage Collection Duration Monitoring Period RegionServer monitoring settings.
Short Name: GC Duration
Garbage Collection Duration Monitoring Period
- Description
- The period to review when computing the moving average of garbage collection time.
- Template Name
- regionserver_gc_duration_window
- Default Value
- 5
- Unit(s)
- MINUTES
Garbage Collection Duration Thresholds
- Description
- The health test thresholds for the weighted average time spent in Java garbage collection. Specified as a percentage of elapsed wall clock time.
- Template Name
- regionserver_gc_duration_thresholds
- Default Value
- critical:60.0, warning:30.0
- Unit(s)
- no unit
RegionServer Heap Dump Directory Free Space
This RegionServer health test checks that the filesystem containing the heap dump directory of this RegionServer has sufficient free space. This test can be configured using the Heap Dump Directory Free Space Monitoring Absolute Thresholds and Heap Dump Directory Free Space Monitoring Percentage Thresholds RegionServer monitoring settings.
Short Name: Heap Dump Directory Free Space
Heap Dump Directory Free Space Monitoring Absolute Thresholds
- Description
- The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory.
- Template Name
- heap_dump_directory_free_space_absolute_thresholds
- Default Value
- critical:5.36870912E9, warning:1.073741824E10
- Unit(s)
- BYTES
Heap Dump Directory Free Space Monitoring Percentage Thresholds
- Description
- The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Heap Dump Directory Free Space Monitoring Absolute Thresholds setting is configured.
- Template Name
- heap_dump_directory_free_space_percentage_thresholds
- Default Value
- critical:never, warning:never
- Unit(s)
- PERCENT
RegionServer Host Health
This RegionServer health test factors in the health of the host upon which the RegionServer is running. A failure of this test means that the host running the RegionServer is experiencing some problem. See that host's status page for more details.This test can be enabled or disabled using the RegionServer Host Health Test RegionServer monitoring setting.
Short Name: Host Health
RegionServer Host Health Test
- Description
- When computing the overall RegionServer health, consider the host's health.
- Template Name
- regionserver_host_health_enabled
- Default Value
- true
- Unit(s)
- no unit
RegionServer Log Directory Free Space
This RegionServer health test checks that the filesystem containing the log directory of this RegionServer has sufficient free space. This test can be configured using the Log Directory Free Space Monitoring Absolute Thresholds and Log Directory Free Space Monitoring Percentage Thresholds RegionServer monitoring settings.
Short Name: Log Directory Free Space
Log Directory Free Space Monitoring Absolute Thresholds
- Description
- The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory.
- Template Name
- log_directory_free_space_absolute_thresholds
- Default Value
- critical:5.36870912E9, warning:1.073741824E10
- Unit(s)
- BYTES
Log Directory Free Space Monitoring Percentage Thresholds
- Description
- The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Log Directory Free Space Monitoring Absolute Thresholds setting is configured.
- Template Name
- log_directory_free_space_percentage_thresholds
- Default Value
- critical:never, warning:never
- Unit(s)
- PERCENT
RegionServer Memstore Size
This is a RegionServer health test that checks that the amount of the RegionServer's memory devoted to memstores does not exceed some percentage of the RegionServer's configured hbase.regionserver.global.memstore.upperLimit. When a RegionServer's memstores reach this maximum size, new updates are blocked while the RegionServer flushes. A failure of this health test indicates a high write load on the RegionServer. Try reducing the write load on the RegionServer, increasing capacity by adding additional disks to the RegionServer, or adding additional RegionServers. This test can be configured using the HBase RegionServer Memstore Size Thresholds RegionServer monitoring setting.
Short Name: Memstore Size
HBase RegionServer Memstore Size Thresholds
- Description
- The health test thresholds of the total size of RegionServer's memstores. Specified as a percentage of the configured upper limit. See Maximum Size of All Memstores in RegionServer.
- Template Name
- regionserver_memstore_size_thresholds
- Default Value
- critical:100.0, warning:95.0
- Unit(s)
- PERCENT
RegionServer Process Status
This RegionServer health test checks that the Cloudera Manager Agent on the RegionServer host is heart beating correctly and that the process associated with the RegionServer role is in the state expected by Cloudera Manager. A failure of this health test may indicate a problem with the RegionServer process, a lack of connectivity to the Cloudera Manager Agent on the RegionServer host, or a problem with the Cloudera Manager Agent. This test can fail either because the RegionServer has crashed or because the RegionServer will not start or stop in a timely fashion. Check the RegionServer logs for more details. If the test fails because of problems communicating with the Cloudera Manager Agent on the RegionServer host, check the status of the Cloudera Manager Agent by running /etc/init.d/cloudera-scm-agent status on the RegionServer host, or look in the Cloudera Manager Agent logs on the RegionServer host for more details. This test can be enabled or disabled using the RegionServer Process Health Test RegionServer monitoring setting.
Short Name: Process Status
RegionServer Process Health Test
- Description
- Enables the health test that the RegionServer's process state is consistent with the role configuration
- Template Name
- regionserver_scm_health_enabled
- Default Value
- true
- Unit(s)
- no unit
RegionServer Store File Index Size
This is a RegionServer health test that checks that the sum of the sizes of all store file indexes does not exceed some percentage of the RegionServer's maximum heap size. A failure of this health test indicates that the RegionServer is using a significant portion of its memory for store file indexes. If the amount of memory devoted to these indexes is undesirably high, the size of indexes can be reduced by increasing the HBase block size, by using smaller key values, or by using fewer columns.. Each of these choices involves trade-offs. Contact Cloudera Support for more information on this topic. This test can be configured using the Percentage of Heap Used by HStoreFile Index RegionServer monitoring setting.
Short Name: Store File Index Size
Percentage of Heap Used by HStoreFile Index
- Description
- The health test thresholds of the size used by the HStoreFile index. Specified as a percentage of the total heap size.
- Template Name
- regionserver_store_file_idx_size_thresholds
- Default Value
- critical:never, warning:10.0
- Unit(s)
- PERCENT
RegionServer Swap Memory Usage
This RegionServer health test checks the amount of swap memory in use by the role. A failure of this health test may indicate that your machine is overloaded. This test can be configured using the Process Swap Memory Thresholds monitoring settings.
Short Name: Swap Memory Usage
Process Swap Memory Thresholds
- Description
- The health test thresholds on the swap memory usage of the process. This takes precedence over the host level threshold.
- Template Name
- process_swap_memory_thresholds
- Default Value
- critical:never, warning:200.0
- Unit(s)
- BYTES
RegionServer Swap Memory Usage Rate Beta
This RegionServer health test checks the change of the amount of swap memory usage by the role during a predefined period. A failure of this health test may indicate that your machine is overloaded. This test can be configured using the Swap Memory Usage Rate Thresholds and Swap Memory Usage Rate Window monitoring settings.
Short Name: Swap Memory Usage Rate Beta
Swap Memory Usage Rate Thresholds
- Description
- The health test thresholds on the swap memory usage rate of the process. Specified as the change of the used swap memory during the predefined period.
- Template Name
- process_swap_memory_rate_thresholds
- Default Value
- critical:never, warning:never
- Unit(s)
- BYTES
Swap Memory Usage Rate Window
- Description
- The period to review when computing unexpected swap memory usage change of the process.
- Template Name
- process_swap_memory_rate_window
- Default Value
- 5
- Unit(s)
- MINUTES
RegionServer Unexpected Exits
This RegionServer health test checks that the RegionServer has not recently exited unexpectedly. The test returns "Bad" health if the number of unexpected exits exceeds a critical threshold. For example, if this test is configured with a critical threshold of 1, this test returns "Good" health if there have been no unexpected exits recently. If 1 or more unexpected exits occured recently, this test returns "Bad" health. The test also indicates whether any of the exits were caused by an OutOfMemory error if the Cloudera Manager Kill When Out of Memory monitoring setting is enabled. This test can be configured using the Unexpected Exits Thresholds and Unexpected Exits Monitoring Period RegionServer monitoring settings.
Short Name: Unexpected Exits
Unexpected Exits Monitoring Period
- Description
- The period to review when computing unexpected exits.
- Template Name
- unexpected_exits_window
- Default Value
- 5
- Unit(s)
- MINUTES
Unexpected Exits Thresholds
- Description
- The health test thresholds for unexpected exits encountered within a recent period specified by the unexpected_exits_window configuration for the role.
- Template Name
- unexpected_exits_thresholds
- Default Value
- critical:any, warning:never
- Unit(s)
- no unit
RegionServer Web Server Status
This health test checks that the role's web server is responding quickly to requests by the Cloudera Manager Agent, and that the Cloudera Manager Agent can collect metrics from the web server. Failure of this health test may indicate a problem with the web server of the RegionServer, a misconfiguration of the RegionServer, or a problem with the Cloudera Manager Agent. Consult the Cloudera Manager Agent logs and the logs of the RegionServer for more detail. If the test failure message indicates a communication problem, the Cloudera Manager Agent's HTTP requests to the RegionServer's web server are failing or timing out. If the test's failure message indicates an unexpected response, the RegionServer's web server responded to the Cloudera Manager Agent's request, but the response could not be interpreted for some reason. This test can be configured using the Web Metric Collection RegionServer monitoring setting.
Short Name: Web Server Status
Web Metric Collection
- Description
- Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server.
- Template Name
- regionserver_web_metric_collection_enabled
- Default Value
- true
- Unit(s)
- no unit
Web Metric Collection Duration
- Description
- The health test thresholds on the duration of the metrics request to the web server.
- Template Name
- regionserver_web_metric_collection_thresholds
- Default Value
- critical:never, warning:10000.0
- Unit(s)
- MILLISECONDS