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https://issues.apache.org/jira/browse/HDFS-4185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14538215#comment-14538215
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Ravi Prakash commented on HDFS-4185:
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Hi Rakesh!
Where do you see this data structure {{private final Collection<String> paths =
new TreeSet<String>();}} ? I'm not able to find it anywhere in the [trunk
source
code|https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/LeaseManager.java]
Are you sure you are on the right branch? A
[commit|https://github.com/apache/hadoop/commit/00fe1ed3a4b3ee35fe24be257ec36445d2f44d63]
has gone in lately, but I can't find this particular string anywhere :(
Please check this [member of
Lease|https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/LeaseManager.java#L234]
. In any case we'll have to bring back some methods after the commit that has
gone in
> Add a metric for number of active leases
> ----------------------------------------
>
> Key: HDFS-4185
> URL: https://issues.apache.org/jira/browse/HDFS-4185
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 0.23.4, 2.0.2-alpha
> Reporter: Kihwal Lee
> Assignee: Rakesh R
> Labels: BB2015-05-TBR
> Attachments: HDFS-4185-001.patch, HDFS-4185-002.patch,
> HDFS-4185-003.patch, HDFS-4185-004.patch, HDFS-4185-005.patch
>
>
> We have seen cases of systematic open file leaks, which could have been
> detected if we have a metric that shows number of active leases.
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