Zhe Zhang created HDFS-10458:
--------------------------------
Summary: getFileEncryptionInfo should return quickly for
non-encrypted cluster
Key: HDFS-10458
URL: https://issues.apache.org/jira/browse/HDFS-10458
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.6.0
Reporter: Zhe Zhang
Assignee: Zhe Zhang
{{FSDirectory#getFileEncryptionInfo}} always acquires {{readLock}} and checks
if the path belongs to an EZ. For a busy system with potentially many listing
operations, this could cause locking contention.
I think we should add a call {{EncryptionZoneManager#hasEncryptionZone()}} to
return whether the system has any EZ. If no EZ at all,
{{getFileEncryptionInfo}} should return null without {{readLock}}.
If {{hasEncryptionZone}} is only used in the above scenario, maybe itself
doesn't need a {{readLock}} -- if the system doesn't have any EZ when
{{getFileEncryptionInfo}} is called on a path, it means the path cannot be
encrypted.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org
For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org
