Events
An event is a record that something of interest has occurred – a service's health has changed state, a log message (of the appropriate severity) has been logged, and so on. Many events are enabled and configured by default.
From the Events page you can filter for events for services or role instances, hosts, users, commands, and much more. You can also search against the content information returned by the event.
The Event Server aggregates relevant events and makes them available for alerting and for searching. This way, you have a view into the history of all relevant events that occur cluster-wide.
Event Category | Description |
---|---|
Activity | Generated by the Activity Monitor; specifically, for jobs that fail, or that run slowly (as determined by comparison with duration limits). In order to monitor your workload for slow-running jobs, you must specify Activity Duration Rules. |
Audit | Generated by actions performed
|
HBase | Generated by HBase with the exception of log messages, which have the Log Message category. |
Health Check | Indicate that certain health check activities have
occurred, or that health check results have met specific conditions
(thresholds). Thresholds for various health checks can be set under the Configuration tabs for HBase, HDFS, Impala, and MapReduce service instances, at both the service and role level. See Configuring Health Monitoring for more information. |
Log Message | Generated for certain types of log messages from HDFS, MapReduce, and HBase services and roles. Log events are created when a log entry matches a set of rules for identifying messages of interest. The default set of rules is based on Cloudera experience supporting Hadoop clusters. You can configure additional log event rules if necessary. |
System | Generated by system events such as parcel availability. |
Viewing Events
The Events page lets you display events and alerts that have occurred within a time range you select anywhere in your clusters. From the Events page you can filter for events for services or role instances, hosts, users, commands, and much more. You can also search against the content information returned by the event.
To view events, click the Diagnose tab on the top navigation bar, then select Events.
Events List
Event entries are ordered (within the time range you've
selected) with the most recent at the top. If the event generated an alert, that is indicated
by a red alert icon () in the
entry.
This page supports infinite scrolling: you can scroll to the end of the displayed results and the page will fetch more results and add them to the end of the list automatically.
To display event details, click the arrow () at the right side of the
event entry.
- Click the View link.
- Click the arrow at the right side of the event entry
(
) to display details of the entry, then click the URL link.

Filtering Events
You filter events by selecting a time range and adding filters.
You can use the Time Range Selector or
a duration link () to set the time range. (See Time Line for details). Note that the time it takes to perform a search will
typically increase for a longer time range, as the number of events to be searched
will be larger.
Adding a Filter
- Click the
icon that displays next to a property when you hover in one of the event entries. A filter containing the property, operator, and its value is added to the list of filters at the left and Cloudera Manager redisplays all events that match the filter.
- Click the Add a filter link. A filter control is added to the list of
filters.
- Choose a property in the drop-down list. You can search by properties such as Username, Service, Command, or Role. The properties vary depending on the service or role.
- If the property allows it, choose an operator in the operator drop-down list.
- Type a property value in the value text field. For some properties
you can include multiple values in the value field. For example, you
can create a filter like Category = HEALTH_CHECK
LOG_MESSAGE. To drop individual values, click the
to the right of the value.
- Click Search. The log displays all events that match the filter criteria.
- Click
to add more filters and repeat steps 1 through 4.

Removing a Filter
- Click the
at the right of the filter. The filter is removed.
- Click Search. The log displays all events that match the filter criteria.
Re-running a Search
To re-run a recently performed search, click
<< |