Our Community is getting an upgrade! To get everything ready for the relaunch, we’ll be placing the site in read-only mode starting September 21st.
We really appreciate your understanding while we get things set up behind the scenes. Catch up on all the exciting details about the move here.
Need help or have questions? Drop us a line at [email protected]

Cloudera Community

Community Articles

Find and share helpful community-sourced technical articles.
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Advanced Search
Announcements
Share your experience with Cloudera on G2 and get a $25 Amazon Gift card.
Hi, I'm CLEO! Something exciting is coming to the Community. Stay Tuned!

What if your Hadoop application get stuck

Labels (2)
avatar
author-rank mlanciaux
Rising Star

Created on ‎04-23-2016 04:08 PM

In a multiple application environment (MapReduce, Tez, others), it can appear that some application get stuck (blocked, deadlocked), it is likely your YARN / MAPREDUCE settings need to be reviewed. First of all, setup YARN queue, check the value of mapreduce.job.reduce.slowstart.completedmaps (interesting to change it to 0.9) and enable preemption.

2,130 Views
0 Kudos
Announcements
Community Announcements
Community Upgrade Announcement
What's New @ Cloudera
Announcing Cloudera Flow Management Operator for Kubernetes ...
What's New @ Cloudera
Announcing Cloudera Streams Messaging Operator for Kubernete...
Community Announcements
July 2026 Community Highlights
Community Announcements
June 2026 Community Highlights
View More Announcements
Version history
Last update:
‎04-23-2016 04:08 PM
Updated by:
Rising Star
Contributors