hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6945) BlockManager should remove a block from excessReplicateMap and decrement ExcessBlocks metric when the block is removed
Date Wed, 01 Apr 2015 18:39:57 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14391185#comment-14391185
] 

Hudson commented on HDFS-6945:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2100 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2100/])
HDFS-6945. BlockManager should remove a block from excessReplicateMap and decrement ExcessBlocks
metric when the block is removed. (aajisaka) (aajisaka: rev 18a91fe4df0448d9f7de91602646ecf5a51c52e4)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/metrics/TestNameNodeMetrics.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> BlockManager should remove a block from excessReplicateMap and decrement ExcessBlocks
metric when the block is removed
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-6945
>                 URL: https://issues.apache.org/jira/browse/HDFS-6945
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.5.0
>            Reporter: Akira AJISAKA
>            Assignee: Akira AJISAKA
>            Priority: Critical
>              Labels: metrics
>             Fix For: 2.8.0
>
>         Attachments: HDFS-6945-003.patch, HDFS-6945-004.patch, HDFS-6945-005.patch, HDFS-6945.2.patch,
HDFS-6945.patch
>
>
> I'm seeing ExcessBlocks metric increases to more than 300K in some clusters, however,
there are no over-replicated blocks (confirmed by fsck).
> After a further research, I noticed when deleting a block, BlockManager does not remove
the block from excessReplicateMap or decrement excessBlocksCount.
> Usually the metric is decremented when processing block report, however, if the block
has been deleted, BlockManager does not remove the block from excessReplicateMap or decrement
the metric.
> That way the metric and excessReplicateMap can increase infinitely (i.e. memory leak
can occur).



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message