Apache
/
hadoop
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

YARN-2964. FSLeafQueue#assignContainer - document the reason for using both write and read locks. (Tsuyoshi Ozawa via kasha) 

(cherry picked from commit f2d150ea12)
This commit is contained in:
Karthik Kambatla 2014-12-17 12:03:16 -08:00
parent 883ad3bf5a
commit 2d832ad2eb
2 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
hadoop-yarn-project/CHANGES.txt
View File

@ -199,6 +199,9 @@ Release 2.7.0 - UNRELEASED
YARN-2914. [YARN-1492] Potential race condition in Singleton implementation of
SharedCacheUploaderMetrics, CleanerMetrics, ClientSCMMetrics. (Varun Saxena via kasha)
YARN-2964. FSLeafQueue#assignContainer - document the reason for using both write and
read locks. (Tsuyoshi Ozawa via kasha)
Release 2.6.0 - 2014-11-18
INCOMPATIBLE CHANGES

3
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSLeafQueue.java
View File

@ -252,6 +252,9 @@ public class FSLeafQueue extends FSQueue {
} finally {
writeLock.unlock();
}
// Release write lock here for better performance and avoiding deadlocks.
// runnableApps can be in unsorted state because of this section,
// but we can accept it in practice since the probability is low.
readLock.lock();
try {
for (FSAppAttempt sched : runnableApps) {