Use the Blaze Job Monitor application to monitor Blaze engine jobs on the Hadoop cluster. 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 can also access the Blaze Job Monitor through the LDTM log. After the session load summary, the log displays a list of segments within the grid task. Each segment contains a link to the Blaze Job Monitor. Click on a link to see the execution details of that segment.
The following image shows the Blaze Job Monitor:
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
to view the mapping grid task log.
The Blaze Job Monitor displays the task history for mapping jobs. You can monitor properties for a task such as name, start time, end 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
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.