Hong Zhiguo created YARN-3897:

             Summary: "Too many links" in NM log dir
                 Key: YARN-3897
                 URL: https://issues.apache.org/jira/browse/YARN-3897
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Hong Zhiguo
            Assignee: Hong Zhiguo
            Priority: Minor

Users need to left container logs more than one day. On some nodes of our busy 
cluster, the number of subdirs of {yarn.nodemanager.log-dirs} may reach 32000, 
which is the defaul limit of ext3 file system. As a result, we got errors when 
initiating containers:
"Failed to create directory 
{yarn.nodemanager.log-dirs}/logs/application_1435111082717_1341740 - Too many 

log aggregation is not an option for us because of the heavy pressure on 
namenode. With a cluster of 5K nodes and 20k log files per node, it's not 
acceptable to aggregate some many files to hdfs.

Since ext3 is still widely used, we'd better do something to avoid such error.

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