Hong Zhiguo created YARN-3897:
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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
links"
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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