[YARN-99] Jobs fail during resource localization when private distributed-cache hits unix directory limits

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha, 3.0.0-alpha1
• Fix Version/s: 2.1.0-beta
• Component/s: nodemanager
• Hadoop Flags: Reviewed
• Assignee: Omkar Vinit Joshi
• Reporter: Devaraj Kavali
• Created: 19/Jun/12 13:48
• Updated: 12/May/16 18:30
• Resolved: 09/Apr/13 01:35

Description

If we have multiple jobs which uses distributed cache with small size of files, the directory limit reaches before reaching the cache size and fails to create any directories in file cache. The jobs start failing with the below exception.

java.io.IOException: mkdir of /tmp/nm-local-dir/usercache/root/filecache/1701886847734194975 failed
	at org.apache.hadoop.fs.FileSystem.primitiveMkdir(FileSystem.java:909)
	at org.apache.hadoop.fs.DelegateToFileSystem.mkdir(DelegateToFileSystem.java:143)
	at org.apache.hadoop.fs.FilterFs.mkdir(FilterFs.java:189)
	at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:706)
	at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:703)
	at org.apache.hadoop.fs.FileContext$FSLinkResolver.resolve(FileContext.java:2325)
	at org.apache.hadoop.fs.FileContext.mkdir(FileContext.java:703)
	at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:147)
	at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:49)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)

We should have a mechanism to clean the cache files if it crosses specified number of directories like cache size.

Issue Links

• blocks: YARN-112 Race in localization can cause containers to fail
• is blocked by: YARN-467 Jobs fail during resource localization when public distributed-cache hits unix directory limits