Database Reference
In-Depth Information
Table 16.2
Alerts Configured by Ambari SCOM
Name
Alert Message
Threshold
Capacity
Remaining
Capacity remaining in HDFS is low if
percentage of available space is less than
the threshold.
30-Warning
10-Critical
Under-Replicated
Blocks
Warns if the number of under-replicated
blocks in the HDFS is above the
threshold.
1-Warning
5-Critical
Corrupted Blocks Alerts if there are any corrupted blocks.
1
DataNodes Down Warns if the number of DataNodes that
are down is greater than the threshold in
the percentage.
10-Warning
20-Critical
Failed Jobs
Alerts if percentage of MapReduce jobs
are greater than the threshold.
10-Warning
40-Critical
Invalid
TaskTrackers
Alerts if there are any invalid
TaskTrackers.
1
Memory Heap
Usage
Warns if JobTracker memory heap grows
to more than the threshold.
80-Warning
90-Critical
Memory Heap
Usage
Warns if NameNode memory heap grows
to more than the threshold.
80-Warning
90-Critical
TaskTrackers
Down
Warns if the number of TaskTrackers that
are down is greater than the threshold in
percentage.
10-Warning
20-Critical
TaskTracker
Service State
Warns if the TaskTracker service is not
available.
NameNode
Service State
NameNode service is not available.
Secondary
NameNode
Service State
Secondary NameNode service is not
available.
JobTracker
Service State
JobTracker service is not available.
