Set Maximum Application limit for a specific queue
To avoid system-thrash due to an unmanageable load -- caused either by malicious users, or by accident -- the Capacity Scheduler enables you to place a static, configurable limit on the total number of concurrently active (both running and pending) applications at any one time.
You can set the maximum-application-limit property using the Maximum Application queue property. The limit for running applications in any specific queue is a fraction of this total limit, proportional to its capacity. This is a hard limit, which means that once this limit is reached for a queue, any new applications to that queue will be rejected, and clients will have to wait and retry later.
To set the application limit (yarn.scheduler.capacity.<queue-path>.maximum-applications) on a specific queue, perform the following:
- In Cloudera Manager, select Clusters > YARN Queue Manager UI service. A graphical queue hierarchy is displayed in the Overview tab.
- Click on the three vertical dots on the queue and select View/Edit Queue Properties option.
- In the Queue Properties dialog-box, enter the maximum application limit in the Maximum Application text box.
For information about setting application limits on all the queues, see Set Application Limits.