[ https://issues.apache.org/jira/browse/HDFS-11789?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arpit Agarwal updated HDFS-11789: --------------------------------- Resolution: Fixed Hadoop Flags: Reviewed Fix Version/s: 3.0.0-alpha4 Status: Resolved (was: Patch Available) I've committed this. Thank you for the contribution [~hanishakoneru]! > Maintain Short-Circuit Read Statistics > -------------------------------------- > > Key: HDFS-11789 > URL: https://issues.apache.org/jira/browse/HDFS-11789 > Project: Hadoop HDFS > Issue Type: Improvement > Components: hdfs-client > Reporter: Hanisha Koneru > Assignee: Hanisha Koneru > Fix For: 3.0.0-alpha4 > > Attachments: HDFS-11789.001.patch, HDFS-11789.002.patch, > HDFS-11789.003.patch, HDFS-11789.004.patch, HDFS-11789.005.patch > > > If a disk or controller hardware is faulty then short-circuit read requests > can stall indefinitely while reading from the file descriptor. Currently > there is no way to detect when short-circuit read requests are slow or > blocked. > This Jira proposes that each BlockReaderLocal maintain read statistics while > it is active by measuring the time taken for a pre-determined fraction of > read requests. These per-reader stats can be aggregated into global stats > when the reader is closed. The aggregate statistics can be exposed via JMX. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org