Impala Daemon Health Tests

Impala Daemon Audit Pipeline Test

This Impala Daemon health test checks that the Auditing for the Impala Daemon role is getting processed correctly and is not blocked. A failure of this health test may indicate a problem with the audit pipeline of Impala Daemon process. This test can fail either because the Cloudera Audit Server is not accepting audits, or the Cloudera Manager Agent on the Impala Daemon 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 Impala Daemon 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

Impala Daemon File Descriptors

This Impala Daemon health test checks that the number of file descriptors used does not rise above some percentage of the Impala Daemon 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 Impala Daemon 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
impalad_fd_thresholds
Default Value
critical:70.0, warning:50.0
Unit(s)
PERCENT

Impala Daemon Heap Dump Directory Free Space

This Impala Daemon health test checks that the filesystem containing the heap dump directory of this Impala Daemon 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 Impala Daemon 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

Impala Daemon Host Health

This Impala Daemon health test factors in the health of the host upon which the Impala Daemon is running. A failure of this test means that the host running the Impala Daemon is experiencing some problem. See that host's status page for more details.This test can be enabled or disabled using the Impala Daemon Host Health Test Impala Daemon monitoring setting.

Short Name: Host Health

Impala Daemon Host Health Test

Description
When computing the overall Impala Daemon health, consider the host's health.
Template Name
impalad_host_health_enabled
Default Value
true
Unit(s)
no unit

Impala Daemon Impala Concurrent Client Connections

This is an Impala Daemon health test that checks the number of active client connections. This check will warn or fail when the number of active connections reaches the user-defined thresholds. This test can be configured using the Impala Daemon Concurrent Client Connections Monitoring Percentage Thresholds Impala Daemon monitoring setting.

Short Name: Impala Concurrent Client Connections

Impala Daemon Concurrent Client Connections Monitoring Percentage Thresholds

Description
The health check thresholds for monitoring of the number of concurrent client connections to Impala Daemon. Specified as a percentage of the maximum client connections parameter.
Template Name
impalad_frontend_connections_thresholds
Default Value
critical:95.0, warning:80.0
Unit(s)
PERCENT

Impala Daemon Impala Daemon Ready Check

This is an Impala Daemon health test that checks if the Impala Daemon is ready to process queries. This test can be configured using the Impala Daemon Ready Status Health Check and Impala Daemon Ready Status Startup Tolerance impalad monitoring settings.

Short Name: Impala Daemon Ready Check

Impala Daemon Ready Status Health Check

Description
Enables the health check that determines if the Impala daemon is ready to process queries.
Template Name
impalad_ready_status_check_enabled
Default Value
true
Unit(s)
no unit

Impala Daemon Ready Status Startup Tolerance

Description
The amount of time at Impala Daemon startup allowed for the Impala Daemon to start accepting new queries for processing.
Template Name
impalad_ready_status_check_startup_tolerance
Default Value
180
Unit(s)
SECONDS

Impala Daemon Impala Daemon Scratch Directories Free Space

This is a Impala Daemon health test that checks that the filesystem containing the Impala Daemon Scratch Directories of this Impala Daemon has sufficient free space. See the Impala Daemon Scratch Directories description on the Impala Daemon configuration page for more information on this directory type. This test can be configured using the Impala Daemon Scratch Directories Free Space Monitoring Absolute Thresholds and Impala Daemon Scratch Directories Free Space Monitoring Percentage Thresholds Impala Daemon monitoring settings.

Short Name: Impala Daemon Scratch Directories Free Space

Impala Daemon Scratch Directories Free Space Monitoring Absolute Thresholds

Description
The health test thresholds for monitoring of free space on the filesystem that contains this role's Impala Daemon Scratch Directories.
Template Name
impalad_scratch_directories_free_space_absolute_thresholds
Default Value
critical:5.36870912E9, warning:1.073741824E10
Unit(s)
BYTES

Impala Daemon Scratch Directories Free Space Monitoring Percentage Thresholds

Description
The health test thresholds for monitoring of free space on the filesystem that contains this role's Impala Daemon Scratch Directories. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Impala Daemon Scratch Directories Free Space Monitoring Absolute Thresholds setting is configured.
Template Name
impalad_scratch_directories_free_space_percentage_thresholds
Default Value
critical:never, warning:never
Unit(s)
PERCENT

Impala Daemon Log Directory Free Space

This Impala Daemon health test checks that the filesystem containing the log directory of this Impala Daemon 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 Impala Daemon 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

Impala Daemon Pause Duration

This Impala Daemon health test checks that the Impala Daemon threads are not experiencing long scheduling pauses. The test uses a pause monitoring thread in the Impala Daemon that tracks scheduling delay by noting if it is run on its requested schedule. If the thread is not run on its requested schedule, the delay is noted and considered pause time. The health test checks that no more than some percentage of recent time is spent paused. A failure of this health test may indicate that the Impala Daemon is not getting enough CPU resources, or that it is spending too much time doing garbage collection. Inspect the Impala Daemon logs for any pause monitor output and check garbage collection metrics exposed by the Impala Daemon. This test can be configured using the Pause Duration Thresholds and Pause Duration Monitoring Period Impala Daemon monitoring settings.

Short Name: Pause Duration

Pause Duration Monitoring Period

Description
The period to review when computing the moving average of extra time the pause monitor spent paused.
Template Name
impalad_pause_duration_window
Default Value
5
Unit(s)
MINUTES

Pause Duration Thresholds

Description
The health test thresholds for the weighted average extra time the pause monitor spent paused. Specified as a percentage of elapsed wall clock time.
Template Name
impalad_pause_duration_thresholds
Default Value
critical:60.0, warning:30.0
Unit(s)
no unit

Impala Daemon Process Status

This Impala Daemon health test checks that the Cloudera Manager Agent on the Impala Daemon host is heart beating correctly and that the process associated with the Impala Daemon role is in the state expected by Cloudera Manager. A failure of this health test may indicate a problem with the Impala Daemon process, a lack of connectivity to the Cloudera Manager Agent on the Impala Daemon host, or a problem with the Cloudera Manager Agent. This test can fail either because the Impala Daemon has crashed or because the Impala Daemon will not start or stop in a timely fashion. Check the Impala Daemon logs for more details. If the test fails because of problems communicating with the Cloudera Manager Agent on the Impala Daemon host, check the status of the Cloudera Manager Agent by running /etc/init.d/cloudera-scm-agent status on the Impala Daemon host, or look in the Cloudera Manager Agent logs on the Impala Daemon host for more details. This test can be enabled or disabled using the Impala Daemon Process Health Test Impala Daemon monitoring setting.

Short Name: Process Status

Impala Daemon Process Health Test

Description
Enables the health test that the Impala Daemon's process state is consistent with the role configuration
Template Name
impalad_scm_health_enabled
Default Value
true
Unit(s)
no unit

Impala Daemon Query Monitoring Status Check

This is an Impala Daemon health test that checks if query monitoring for the Impala Daemon is successful. This check fails if the Impala Daemon web server is not available, or error is encountered when processing Impala query profiles. If the Impala Daemon web server is not available, no Impala queries that are currently running can be collected. If there is error processing Impala query profiles, collection of completed queries will be impacted. Check Cloudera Manager Agent log for more details. This test can be configured using the Impala Daemon Query Collection Status Health Check Impala Daemon monitoring setting.

Short Name: Query Monitoring Status Check

Impala Daemon Query Collection Status Health Check

Description
Enables the health check that determines if query collection for the Impala Daemon is successful.
Template Name
impala_query_monitoring_status_check_enabled
Default Value
true
Unit(s)
no unit

Monitoring Period For Query Monitoring Failures

Description
The period to review when computing query monitoring failures.
Template Name
impala_query_monitoring_failure_window
Default Value
5
Unit(s)
MINUTES

Query Monitoring Failures Thresholds

Description
The health test thresholds for failures encountered when monitoring queries within a recent period specified by the impala_query_monitoring_failure_window configuration for the role.
Template Name
impala_query_monitoring_failure_thresholds
Default Value
critical:any, warning:never
Unit(s)
no unit

Query Monitoring Full Sync Period

Description
The full sync period of the Impala query monitor in the Cloudera Manager Agent, specified in minutes. When a full sync is happening, all query profiles are sent over regardless of having been updated or not. If set to zero, a full sync is performed at each polling period.
Template Name
query_monitoring_full_sync_period_minutes
Default Value
2.0
Unit(s)
MINUTES

Query Monitoring Period

Description
The polling period of the Impala query monitor in the Cloudera Manager Agent, specified in seconds. If set to zero, query monitoring is disabled.
Template Name
query_monitoring_period_seconds
Default Value
1.0
Unit(s)
SECONDS

Impala Daemon Resident Set Size

This Impala Daemon health test checks that the size of the resident set does not rise above a configured threshold value. A failure of this health test may indicates that the Impala Daemon process is consuming more memory than expected. It is possible that that unexpected memory consumption may lead to swapping and decreased performance for processes running on the same host as this Impala Daemon. Increased Impala Daemon memory consumption may be caused by an increased workload on the Impala service, or by a bug in the Impala Daemon software. To avoid failures of this health test, free up additional memory for this Impala Daemon process and increase the Resident Set Size Thresholds monitoring setting. This test can be configured using the Resident Set Size Thresholds Impala Daemon monitoring setting.

Short Name: Resident Set Size

Resident Set Size Thresholds

Description
The health test thresholds on the resident size of the process.
Template Name
process_resident_set_size_thresholds
Default Value
critical:never, warning:never
Unit(s)
BYTES

Impala Daemon StateStore Connectivity

This is an Impala Daemon health test that checks whether the StateStore considers the Impala Daemon alive. A failure of this health test may indicate that the Impala Daemon is having trouble communicating with the StateStore. Look in the Impala Daemon logs for more details. This test may return an unknown result if the Service Monitor is not able to communicate with the StateStore web server. Check the status of the StateStore web server and the Service Monitor logs if this test is returning an unknown result. This test can be enabled or disabled using the Impala Daemon Connectivity Health Test Impala Daemon monitoring setting. The Impala Daemon Connectivity Tolerance at Startup Impala Daemon monitoring setting and the Health Test Startup Tolerance StateStore monitoring setting can be used to control the test's tolerance windows around Impala Daemon and StateStore restarts respectively.

Short Name: StateStore Connectivity

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
statestore_startup_tolerance
Default Value
5
Unit(s)
MINUTES

Impala Daemon Connectivity Health Test

Description
Enables the health test that verifies the Impala Daemon is connected to the StateStore.
Template Name
impalad_connectivity_health_enabled
Default Value
true
Unit(s)
no unit

Impala Daemon Connectivity Tolerance at Startup

Description
The amount of time to wait for the Impala Daemon to fully start up and connect to the StateStore before enforcing the connectivity check.
Template Name
impalad_connectivity_tolerance
Default Value
180
Unit(s)
SECONDS

Impala Daemon Swap Memory Usage

This Impala Daemon 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:any, warning:any
Unit(s)
BYTES

Impala Daemon Swap Memory Usage Rate Beta

This Impala Daemon 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

Impala Daemon Unexpected Exits

This Impala Daemon health test checks that the Impala Daemon 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 Impala Daemon 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

Impala Daemon 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 Impala Daemon, a misconfiguration of the Impala Daemon, or a problem with the Cloudera Manager Agent. Consult the Cloudera Manager Agent logs and the logs of the Impala Daemon for more detail. If the test failure message indicates a communication problem, the Cloudera Manager Agent's HTTP requests to the Impala Daemon's web server are failing or timing out. If the test's failure message indicates an unexpected response, the Impala Daemon'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 Impala Daemon 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
impalad_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
impalad_web_metric_collection_thresholds
Default Value
critical:never, warning:10000.0
Unit(s)
MILLISECONDS