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Posted to common-issues@hadoop.apache.org by "Konstantin Shvachko (JIRA)" <ji...@apache.org> on 2016/05/20 22:26:12 UTC
[jira] [Moved] (HADOOP-13189) FairCallQueue makes callQueue larger
than the configured capacity.
[ https://issues.apache.org/jira/browse/HADOOP-13189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Konstantin Shvachko moved HDFS-10443 to HADOOP-13189:
-----------------------------------------------------
Affects Version/s: (was: 2.6.0)
2.6.0
Target Version/s: 2.6.5 (was: 2.6.5)
Component/s: (was: namenode)
ipc
Key: HADOOP-13189 (was: HDFS-10443)
Project: Hadoop Common (was: Hadoop HDFS)
> FairCallQueue makes callQueue larger than the configured capacity.
> ------------------------------------------------------------------
>
> Key: HADOOP-13189
> URL: https://issues.apache.org/jira/browse/HADOOP-13189
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 2.6.0
> Reporter: Konstantin Shvachko
>
> {{FairCallQueue}} divides {{callQueue}} into multiple (4 by default) sub-queues, with each sub-queue corresponding to a different level of priority. The constructor for {{FairCallQueue}} takes the same parameter {{capacity}} as the default CallQueue implementation, and allocates all its sub-queues of size {{capacity}}. With 4 levels of priority (sub-queues) by default it results in the total callQueue size 4 times larger than it should be based on the configuration.
> {{capacity}} should be divided by the number of sub-queues at some place.
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