Tsz-wo Sze created HDFS-16881:
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Summary: Print a warning if AccessControlEnforcer runs for a long
time to check permission
Key: HDFS-16881
URL: https://issues.apache.org/jira/browse/HDFS-16881
Project: Hadoop HDFS
Issue Type: Bug
Components: namanode
Reporter: Tsz-wo Sze
Assignee: Tsz-wo Sze
AccessControlEnforcer is configurable. If an external AccessControlEnforcer
runs for a long time to check permission with the FSnamesystem lock, it will
significantly slow down the entire Namenode. In the JIRA, we will print a WARN
message when it happens.
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