Configuring Custom Alert Scripts
Minimum Required Role: Full Administrator
You can configure the Alert Publisher to run a user-written script in response to an alert. The Alert Publisher passes a single argument to the script that is a UTF-8 JSON file containing a list of alerts. The script runs on the host where the Alert Publisher service is running and must have read and execute permissions for the cloudera-scm user. Only one instance of a script runs at a time. The standard out and standard error messages from the script are logged to the Alert Publisher log file.
You use the Alert Publisher: Maximum Batch Size and Alert Publisher: Maximum Batch interval to configure when the Alert Publisher delivers alerts. See Configuring Alerts.
To configure the Alert Publisher to deliver alerts using a script:
- Save the script on the host where the Alert Publisher role is running.
- Change the owner of the file to cloudera-scm and set its permissions to read and execute:
$ sudo chown cloudera-scm:cloudera-scm path_to_script $ sudo chmod u+rx path_to_script
- Open the Cloudera Manager Admin console and select .
- Click the Configuration tab.
- Select .
- Enter the path to the script in the Custom Alert Script property.
- Click Save Changes to commit the changes.
Sample JSON Alert File
When a custom script runs, it passes a JSON file that contains the alerts. For example:
[ {
"body" : {
"alert" : {
"content" : "The health test result for MAPREDUCE_HA_JOB_TRACKER_HEALTH has become bad: JobTracker summary: myCluster.com (Availability: Active, Health: Bad). This health test reflects the health of the active JobTracker.",
"timestamp" : {
"iso8601" : "2015-06-11T03:52:56Z",
"epochMs" : 1433994776083
},
"source" : "http://myCluster.com:7180/cmf/eventRedirect/89521139-0859-4bef-bf65-eb141e63dbba",
"attributes" : {
"__persist_timestamp" : [ "1433994776172" ],
"ALERT_SUPPRESSED" : [ "false" ],
"HEALTH_TEST_NAME" : [ "MAPREDUCE_HA_JOB_TRACKER_HEALTH" ],
"SEVERITY" : [ "CRITICAL" ],
"HEALTH_TEST_RESULTS" : [ {
"content" : "The health test result for MAPREDUCE_HA_JOB_TRACKER_HEALTH has become bad: JobTracker summary: myCluster.com (Availability: Active, Health: Bad). This health test reflects the health of the active JobTracker.",
"testName" : "MAPREDUCE_HA_JOB_TRACKER_HEALTH",
"eventCode" : "EV_SERVICE_HEALTH_CHECK_BAD",
"severity" : "CRITICAL"
} ],
"CLUSTER_DISPLAY_NAME" : [ "Cluster 1" ],
"ALERT" : [ "true" ],
"CATEGORY" : [ "HEALTH_CHECK" ],
"BAD_TEST_RESULTS" : [ "1" ],
"SERVICE_TYPE" : [ "MAPREDUCE" ],
"EVENTCODE" : [ "EV_SERVICE_HEALTH_CHECK_BAD", "EV_SERVICE_HEALTH_CHECK_GOOD" ],
"ALERT_SUMMARY" : [ "The health of service MAPREDUCE-1 has become bad." ],
"CLUSTER_ID" : [ "1" ],
"SERVICE" : [ "MAPREDUCE-1" ],
"__uuid" : [ "89521139-0859-4bef-bf65-eb141e63dbba" ],
"CLUSTER" : [ "Cluster 1" ],
"CURRENT_COMPLETE_HEALTH_TEST_RESULTS" : [ "{\"content\":\"The health test result for MAPREDUCE_HA_JOB_TRACKER_HEALTH has become bad: JobTracker summary: myCluster.com (Availability: Active, Health: Bad). This health test reflects the health of the active JobTracker.\",\"testName\":\"MAPREDUCE_HA_JOB_TRACKER_HEALTH\",\"eventCode\":\"EV_SERVICE_HEALTH_CHECK_BAD\",\"severity\":\"CRITICAL\"}", "{\"content\":\"The health test result for MAPREDUCE_TASK_TRACKERS_HEALTHY has become good: Healthy TaskTracker: 3. Concerning TaskTracker: 0. Total TaskTracker: 3. Percent healthy: 100.00%. Percent healthy or concerning: 100.00%.\",\"testName\":\"MAPREDUCE_TASK_TRACKERS_HEALTHY\",\"eventCode\":\"EV_SERVICE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}" ],
"PREVIOUS_HEALTH_SUMMARY" : [ "GREEN" ],
"CURRENT_HEALTH_SUMMARY" : [ "RED" ],
"MONITOR_STARTUP" : [ "false" ],
"PREVIOUS_COMPLETE_HEALTH_TEST_RESULTS" : [ "{\"content\":\"The health test result for MAPREDUCE_HA_JOB_TRACKER_HEALTH has become good: JobTracker summary: myCluster.com (Availability: Active, Health: Good)\",\"testName\":\"MAPREDUCE_HA_JOB_TRACKER_HEALTH\",\"eventCode\":\"EV_SERVICE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for MAPREDUCE_TASK_TRACKERS_HEALTHY has become good: Healthy TaskTracker: 3. Concerning TaskTracker: 0. Total TaskTracker: 3. Percent healthy: 100.00%. Percent healthy or concerning: 100.00%.\",\"testName\":\"MAPREDUCE_TASK_TRACKERS_HEALTHY\",\"eventCode\":\"EV_SERVICE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}" ],
"SERVICE_DISPLAY_NAME" : [ "MAPREDUCE-1" ]
}
}
},
"header" : {
"type" : "alert",
"version" : 2
}
}, {
"body" : {
"alert" : {
"content" : "The health test result for JOB_TRACKER_SCM_HEALTH has become bad: This role's process exited. This role is supposed to be started.",
"timestamp" : {
"iso8601" : "2015-06-11T03:52:56Z",
"epochMs" : 1433994776083
},
"source" : "http://myCluster.com:7180/cmf/eventRedirect/67b4d1c4-791b-428e-a9ea-8a09d4885f5d",
"attributes" : {
"__persist_timestamp" : [ "1433994776173" ],
"ALERT_SUPPRESSED" : [ "false" ],
"HEALTH_TEST_NAME" : [ "JOB_TRACKER_SCM_HEALTH" ],
"SEVERITY" : [ "CRITICAL" ],
"ROLE" : [ "MAPREDUCE-1-JOBTRACKER-10624c438dee9f17211d3f33fa899957" ],
"HEALTH_TEST_RESULTS" : [ {
"content" : "The health test result for JOB_TRACKER_SCM_HEALTH has become bad: This role's process exited. This role is supposed to be started.",
"testName" : "JOB_TRACKER_SCM_HEALTH",
"eventCode" : "EV_ROLE_HEALTH_CHECK_BAD",
"severity" : "CRITICAL"
} ],
"CLUSTER_DISPLAY_NAME" : [ "Cluster 1" ],
"HOST_IDS" : [ "75e763c2-8d22-47a1-8c80-501751ae0db7" ],
"ALERT" : [ "true" ],
"ROLE_TYPE" : [ "JOBTRACKER" ],
"CATEGORY" : [ "HEALTH_CHECK" ],
"BAD_TEST_RESULTS" : [ "1" ],
"SERVICE_TYPE" : [ "MAPREDUCE" ],
"EVENTCODE" : [ "EV_ROLE_HEALTH_CHECK_BAD", "EV_ROLE_HEALTH_CHECK_GOOD", "EV_ROLE_HEALTH_CHECK_DISABLED" ],
"ALERT_SUMMARY" : [ "The health of role jobtracker (nightly-1) has become bad." ],
"CLUSTER_ID" : [ "1" ],
"SERVICE" : [ "MAPREDUCE-1" ],
"__uuid" : [ "67b4d1c4-791b-428e-a9ea-8a09d4885f5d" ],
"CLUSTER" : [ "Cluster 1" ],
"CURRENT_COMPLETE_HEALTH_TEST_RESULTS" : [ "{\"content\":\"The health test result for JOB_TRACKER_SCM_HEALTH has become bad: This role's process exited. This role is supposed to be started.\",\"testName\":\"JOB_TRACKER_SCM_HEALTH\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_BAD\",\"severity\":\"CRITICAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_UNEXPECTED_EXITS has become good: This role encountered 0 unexpected exit(s) in the previous 5 minute(s).\",\"testName\":\"JOB_TRACKER_UNEXPECTED_EXITS\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_FILE_DESCRIPTOR has become good: Open file descriptors: 244. File descriptor limit: 32,768. Percentage in use: 0.74%.\",\"testName\":\"JOB_TRACKER_FILE_DESCRIPTOR\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_SWAP_MEMORY_USAGE has become good: 0 B of swap memory is being used by this role's process.\",\"testName\":\"JOB_TRACKER_SWAP_MEMORY_USAGE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_LOG_DIRECTORY_FREE_SPACE has become good: This role's Log Directory (/var/log/hadoop-0.20-mapreduce) is on a filesystem with more than 20.00% of its space free.\",\"testName\":\"JOB_TRACKER_LOG_DIRECTORY_FREE_SPACE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_HOST_HEALTH has become good: The health of this role's host is good.\",\"testName\":\"JOB_TRACKER_HOST_HEALTH\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_WEB_METRIC_COLLECTION has become good: The web server of this role is responding with metrics. The most recent collection took 49 millisecond(s).\",\"testName\":\"JOB_TRACKER_WEB_METRIC_COLLECTION\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_GC_DURATION has become good: Average time spent in garbage collection was 0 second(s) (0.00%) per minute over the previous 5 minute(s).\",\"testName\":\"JOB_TRACKER_GC_DURATION\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_HEAP_DUMP_DIRECTORY_FREE_SPACE has become disabled: Test disabled because role is not configured to dump heap when out of memory. Test of whether this role's heap dump directory has enough free space.\",\"testName\":\"JOB_TRACKER_HEAP_DUMP_DIRECTORY_FREE_SPACE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_DISABLED\",\"severity\":\"INFORMATIONAL\"}" ],
"CURRENT_HEALTH_SUMMARY" : [ "RED" ],
"PREVIOUS_HEALTH_SUMMARY" : [ "GREEN" ],
"MONITOR_STARTUP" : [ "false" ],
"ROLE_DISPLAY_NAME" : [ "jobtracker (nightly-1)" ],
"PREVIOUS_COMPLETE_HEALTH_TEST_RESULTS" : [ "{\"content\":\"The health test result for JOB_TRACKER_SCM_HEALTH has become good: This role's status is as expected. The role is started.\",\"testName\":\"JOB_TRACKER_SCM_HEALTH\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_UNEXPECTED_EXITS has become good: This role encountered 0 unexpected exit(s) in the previous 5 minute(s).\",\"testName\":\"JOB_TRACKER_UNEXPECTED_EXITS\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_FILE_DESCRIPTOR has become good: Open file descriptors: 244. File descriptor limit: 32,768. Percentage in use: 0.74%.\",\"testName\":\"JOB_TRACKER_FILE_DESCRIPTOR\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_SWAP_MEMORY_USAGE has become good: 0 B of swap memory is being used by this role's process.\",\"testName\":\"JOB_TRACKER_SWAP_MEMORY_USAGE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_LOG_DIRECTORY_FREE_SPACE has become good: This role's Log Directory (/var/log/hadoop-0.20-mapreduce) is on a filesystem with more than 20.00% of its space free.\",\"testName\":\"JOB_TRACKER_LOG_DIRECTORY_FREE_SPACE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_HOST_HEALTH has become good: The health of this role's host is good.\",\"testName\":\"JOB_TRACKER_HOST_HEALTH\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_WEB_METRIC_COLLECTION has become good: The web server of this role is responding with metrics. The most recent collection took 49 millisecond(s).\",\"testName\":\"JOB_TRACKER_WEB_METRIC_COLLECTION\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_GC_DURATION has become good: Average time spent in garbage collection was 0 second(s) (0.00%) per minute over the previous 5 minute(s).\",\"testName\":\"JOB_TRACKER_GC_DURATION\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_HEAP_DUMP_DIRECTORY_FREE_SPACE has become disabled: Test disabled because role is not configured to dump heap when out of memory. Test of whether this role's heap dump directory has enough free space.\",\"testName\":\"JOB_TRACKER_HEAP_DUMP_DIRECTORY_FREE_SPACE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_DISABLED\",\"severity\":\"INFORMATIONAL\"}" ],
"SERVICE_DISPLAY_NAME" : [ "MAPREDUCE-1" ],
"HOSTS" : [ "myCluster.com" ]
}
}
},
"header" : {
"type" : "alert",
"version" : 2
}
}, {
"body" : {
"alert" : {
"content" : "The health test result for JOB_TRACKER_UNEXPECTED_EXITS has become bad: This role encountered 1 unexpected exit(s) in the previous 5 minute(s).This included 1 exit(s) due to OutOfMemory errors. Critical threshold: any.",
"timestamp" : {
"iso8601" : "2015-06-11T03:53:41Z",
"epochMs" : 1433994821940
},
"source" : "http://myCluster.com:7180/cmf/eventRedirect/b8c4468d-08c2-4b5b-9bda-2bef892ba3f5",
"attributes" : {
"__persist_timestamp" : [ "1433994822027" ],
"ALERT_SUPPRESSED" : [ "false" ],
"HEALTH_TEST_NAME" : [ "JOB_TRACKER_UNEXPECTED_EXITS" ],
"SEVERITY" : [ "CRITICAL" ],
"ROLE" : [ "MAPREDUCE-1-JOBTRACKER-10624c438dee9f17211d3f33fa899957" ],
"HEALTH_TEST_RESULTS" : [ {
"content" : "The health test result for JOB_TRACKER_UNEXPECTED_EXITS has become bad: This role encountered 1 unexpected exit(s) in the previous 5 minute(s).This included 1 exit(s) due to OutOfMemory errors. Critical threshold: any.",
"testName" : "JOB_TRACKER_UNEXPECTED_EXITS",
"eventCode" : "EV_ROLE_HEALTH_CHECK_BAD",
"severity" : "CRITICAL"
} ],
"CLUSTER_DISPLAY_NAME" : [ "Cluster 1" ],
"HOST_IDS" : [ "75e763c2-8d22-47a1-8c80-501751ae0db7" ],
"ALERT" : [ "true" ],
"ROLE_TYPE" : [ "JOBTRACKER" ],
"CATEGORY" : [ "HEALTH_CHECK" ],
"BAD_TEST_RESULTS" : [ "1" ],
"SERVICE_TYPE" : [ "MAPREDUCE" ],
"EVENTCODE" : [ "EV_ROLE_HEALTH_CHECK_BAD", "EV_ROLE_HEALTH_CHECK_GOOD", "EV_ROLE_HEALTH_CHECK_DISABLED" ],
"ALERT_SUMMARY" : [ "The health of role jobtracker (nightly-1) has become bad." ],
"CLUSTER_ID" : [ "1" ],
"SERVICE" : [ "MAPREDUCE-1" ],
"__uuid" : [ "b8c4468d-08c2-4b5b-9bda-2bef892ba3f5" ],
"CLUSTER" : [ "Cluster 1" ],
"CURRENT_COMPLETE_HEALTH_TEST_RESULTS" : [ "{\"content\":\"The health test result for JOB_TRACKER_SCM_HEALTH has become bad: This role's process exited. This role is supposed to be started.\",\"testName\":\"JOB_TRACKER_SCM_HEALTH\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_BAD\",\"severity\":\"CRITICAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_UNEXPECTED_EXITS has become bad: This role encountered 1 unexpected exit(s) in the previous 5 minute(s).This included 1 exit(s) due to OutOfMemory errors. Critical threshold: any.\",\"testName\":\"JOB_TRACKER_UNEXPECTED_EXITS\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_BAD\",\"severity\":\"CRITICAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_FILE_DESCRIPTOR has become good: Open file descriptors: 244. File descriptor limit: 32,768. Percentage in use: 0.74%.\",\"testName\":\"JOB_TRACKER_FILE_DESCRIPTOR\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_SWAP_MEMORY_USAGE has become good: 0 B of swap memory is being used by this role's process.\",\"testName\":\"JOB_TRACKER_SWAP_MEMORY_USAGE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_LOG_DIRECTORY_FREE_SPACE has become good: This role's Log Directory (/var/log/hadoop-0.20-mapreduce) is on a filesystem with more than 20.00% of its space free.\",\"testName\":\"JOB_TRACKER_LOG_DIRECTORY_FREE_SPACE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_HOST_HEALTH has become good: The health of this role's host is good.\",\"testName\":\"JOB_TRACKER_HOST_HEALTH\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_WEB_METRIC_COLLECTION has become good: The web server of this role is responding with metrics. The most recent collection took 49 millisecond(s).\",\"testName\":\"JOB_TRACKER_WEB_METRIC_COLLECTION\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_GC_DURATION has become good: Average time spent in garbage collection was 0 second(s) (0.00%) per minute over the previous 5 minute(s).\",\"testName\":\"JOB_TRACKER_GC_DURATION\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_HEAP_DUMP_DIRECTORY_FREE_SPACE has become disabled: Test disabled because role is not configured to dump heap when out of memory. Test of whether this role's heap dump directory has enough free space.\",\"testName\":\"JOB_TRACKER_HEAP_DUMP_DIRECTORY_FREE_SPACE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_DISABLED\",\"severity\":\"INFORMATIONAL\"}" ],
"CURRENT_HEALTH_SUMMARY" : [ "RED" ],
"PREVIOUS_HEALTH_SUMMARY" : [ "RED" ],
"MONITOR_STARTUP" : [ "false" ],
"ROLE_DISPLAY_NAME" : [ "jobtracker (nightly-1)" ],
"PREVIOUS_COMPLETE_HEALTH_TEST_RESULTS" : [ "{\"content\":\"The health test result for JOB_TRACKER_SCM_HEALTH has become bad: This role's process exited. This role is supposed to be started.\",\"testName\":\"JOB_TRACKER_SCM_HEALTH\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_BAD\",\"severity\":\"CRITICAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_UNEXPECTED_EXITS has become good: This role encountered 0 unexpected exit(s) in the previous 5 minute(s).\",\"testName\":\"JOB_TRACKER_UNEXPECTED_EXITS\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_FILE_DESCRIPTOR has become good: Open file descriptors: 244. File descriptor limit: 32,768. Percentage in use: 0.74%.\",\"testName\":\"JOB_TRACKER_FILE_DESCRIPTOR\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_SWAP_MEMORY_USAGE has become good: 0 B of swap memory is being used by this role's process.\",\"testName\":\"JOB_TRACKER_SWAP_MEMORY_USAGE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_LOG_DIRECTORY_FREE_SPACE has become good: This role's Log Directory (/var/log/hadoop-0.20-mapreduce) is on a filesystem with more than 20.00% of its space free.\",\"testName\":\"JOB_TRACKER_LOG_DIRECTORY_FREE_SPACE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_HOST_HEALTH has become good: The health of this role's host is good.\",\"testName\":\"JOB_TRACKER_HOST_HEALTH\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_WEB_METRIC_COLLECTION has become good: The web server of this role is responding with metrics. The most recent collection took 49 millisecond(s).\",\"testName\":\"JOB_TRACKER_WEB_METRIC_COLLECTION\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_GC_DURATION has become good: Average time spent in garbage collection was 0 second(s) (0.00%) per minute over the previous 5 minute(s).\",\"testName\":\"JOB_TRACKER_GC_DURATION\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_GOOD\",\"severity\":\"INFORMATIONAL\"}", "{\"content\":\"The health test result for JOB_TRACKER_HEAP_DUMP_DIRECTORY_FREE_SPACE has become disabled: Test disabled because role is not configured to dump heap when out of memory. Test of whether this role's heap dump directory has enough free space.\",\"testName\":\"JOB_TRACKER_HEAP_DUMP_DIRECTORY_FREE_SPACE\",\"eventCode\":\"EV_ROLE_HEALTH_CHECK_DISABLED\",\"severity\":\"INFORMATIONAL\"}" ],
"SERVICE_DISPLAY_NAME" : [ "MAPREDUCE-1" ],
"HOSTS" : [ "myCluster.com" ]
}
}
},
"header" : {
"type" : "alert",
"version" : 2
}
} ]