You configure the host that starts the Blaze Job Monitor in the Hadoop connection properties. You might want to configure the Blaze Job Monitor address to avoid conflicts with other users on the same cluster, or if you have access to a limited number of nodes. If you do not configure the Blaze Job Monitor address, the Grid Manager starts the host on the first alphabetical cluster node with a default port of 9080.

The Blaze engine monitoring URL appears in the Monitor tab of the Administrator tool when you view a Blaze engine mapping job. When you click the URL, the Blaze engine monitoring application opens in a web page.

You configure the host that starts the Blaze Job Monitor in the Hadoop connection properties. The default address is <hostname>:9080.

The following image shows the Blaze Job Monitor:

Use the

Task History

panel on the left to filter Blaze mapping jobs by the following criteria:

Grid task. A parallel processing job request sent by the Blaze engine executor to the Grid Manager. You can further filter by all tasks, succeeded tasks, running tasks, or failed tasks.
Grid segment. Part of a grid mapping that is contained in a grid task.
Tasklet. A partition of a grid segment that runs on a separate DTM.
Tasklet Attempts. The number of recovery attempts to restart a tasklet. Click
Log
to view the mapping grid task log.

The Blaze Job Monitor displays the task history for mapping jobs with the same namespace. You can monitor properties for a task such as start time, end time, elapsed time, or state of the task. You can also view log events. If you filter mapping jobs by grid segment, you can mouse over a grid segment to view the logical name of the segment.

By default, the Blaze Job Monitor automatically refreshes the list of tasks every five seconds and reverts to the first page that displays tasks. Disable auto refresh if you want to browse through multiple pages. To turn off automatic refresh, click

Action

Disable Auto Refresh

.

The Blaze Job Monitor displays the first 100,000 grid tasks run in the past seven days. The Blaze Job Monitor displays the grid segments, tasklets, and tasklet attempts for grid tasks that are running and grid tasks that were accessed in the last 30 minutes.