[jira] [Updated] (CASSANDRA-5947) Sampling bug in metrics-core-2.0.3.jar used by Cassandra
[ https://issues.apache.org/jira/browse/CASSANDRA-5947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Yuki Morishita updated CASSANDRA-5947: -- Attachment: 5947-1.2.txt Patch attached to change JMX ObjectName as the same (unquoted) as when we had metrics-core-2.0.3.jar. Sampling bug in metrics-core-2.0.3.jar used by Cassandra Key: CASSANDRA-5947 URL: https://issues.apache.org/jira/browse/CASSANDRA-5947 Project: Cassandra Issue Type: Bug Components: Tools Reporter: J.B. Langston Assignee: Yuki Morishita Priority: Minor Fix For: 1.2.10, 2.0.1 Attachments: 5947-1.2.txt, Screen Shot 2013-09-10 at 2.23.11 PM.png There is a sampling bug in the version of the metrics library we're using in Cassandra. See https://github.com/codahale/metrics/issues/421. ExponentiallyDecayingSample is used by the Timer's histogram that is used in stress tool, and according to [~brandon.williams] it is also in a few other places like the dynamic snitch. The statistical theory involved in this bug goes over my head so i'm not sure if this would bug would meaningfully affect its usage by Cassandra. One of the comments on the bug mentions that it affects slow sampling rates (10 samples/min was the example given). We're currently distributing metrics-core-2.0.3.jar and according to the release nodes, this bug is fixed in 2.1.3: http://metrics.codahale.com/about/release-notes/#v2-1-3-aug-06-2012 -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Updated] (CASSANDRA-5947) Sampling bug in metrics-core-2.0.3.jar used by Cassandra
[ https://issues.apache.org/jira/browse/CASSANDRA-5947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Ravi Prasad updated CASSANDRA-5947: --- Attachment: Screen Shot 2013-09-10 at 2.23.11 PM.png Screenshot of jconsole showing double quoted object names only for org.apache.cassandra.metrics yammer metrics in cassandra-1.2.10(latest cassandra-1.2 branch) with metrics-core-2.2.0.jar Sampling bug in metrics-core-2.0.3.jar used by Cassandra Key: CASSANDRA-5947 URL: https://issues.apache.org/jira/browse/CASSANDRA-5947 Project: Cassandra Issue Type: Bug Components: Tools Reporter: J.B. Langston Assignee: Jonathan Ellis Priority: Minor Fix For: 1.2.10, 2.0.1 Attachments: Screen Shot 2013-09-10 at 2.23.11 PM.png There is a sampling bug in the version of the metrics library we're using in Cassandra. See https://github.com/codahale/metrics/issues/421. ExponentiallyDecayingSample is used by the Timer's histogram that is used in stress tool, and according to [~brandon.williams] it is also in a few other places like the dynamic snitch. The statistical theory involved in this bug goes over my head so i'm not sure if this would bug would meaningfully affect its usage by Cassandra. One of the comments on the bug mentions that it affects slow sampling rates (10 samples/min was the example given). We're currently distributing metrics-core-2.0.3.jar and according to the release nodes, this bug is fixed in 2.1.3: http://metrics.codahale.com/about/release-notes/#v2-1-3-aug-06-2012 -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Updated] (CASSANDRA-5947) Sampling bug in metrics-core-2.0.3.jar used by Cassandra
[ https://issues.apache.org/jira/browse/CASSANDRA-5947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Jonathan Ellis updated CASSANDRA-5947: -- Component/s: Tools Priority: Minor (was: Major) Assignee: Jonathan Ellis (was: Brandon Williams) Sampling bug in metrics-core-2.0.3.jar used by Cassandra Key: CASSANDRA-5947 URL: https://issues.apache.org/jira/browse/CASSANDRA-5947 Project: Cassandra Issue Type: Bug Components: Tools Reporter: J.B. Langston Assignee: Jonathan Ellis Priority: Minor There is a sampling bug in the version of the metrics library we're using in Cassandra. See https://github.com/codahale/metrics/issues/421. ExponentiallyDecayingSample is used by the Timer's histogram that is used in stress tool, and according to [~brandon.williams] it is also in a few other places like the dynamic snitch. The statistical theory involved in this bug goes over my head so i'm not sure if this would bug would meaningfully affect its usage by Cassandra. One of the comments on the bug mentions that it affects slow sampling rates (10 samples/min was the example given). We're currently distributing metrics-core-2.0.3.jar and according to the release nodes, this bug is fixed in 2.1.3: http://metrics.codahale.com/about/release-notes/#v2-1-3-aug-06-2012 -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira
