[
https://issues.apache.org/jira/browse/STORM-885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15018553#comment-15018553
]
ASF GitHub Bot commented on STORM-885:
--------------------------------------
Github user d2r commented on a diff in the pull request:
https://github.com/apache/storm/pull/838#discussion_r45505075
--- Diff: storm-core/src/clj/backtype/storm/util.clj ---
@@ -1062,6 +1062,22 @@
(defn hashmap-to-persistent [^HashMap m]
(zipmap (.keySet m) (.values m)))
+(defn retry-on-exception
+ "Retries specific function on exception based on retries count"
+ [tries task-description f & args]
+ (let [res (try {:value (apply f args)}
+ (catch Exception e
+ (if (= 0 tries)
+ (throw e)
+ {:exception e})))]
--- End diff --
Probably should check that `tries` is not `pos?`, in case of crazy values
of `tries`.
> Heartbeat Server (Pacemaker)
> ----------------------------
>
> Key: STORM-885
> URL: https://issues.apache.org/jira/browse/STORM-885
> Project: Apache Storm
> Issue Type: Improvement
> Components: storm-core
> Reporter: Robert Joseph Evans
> Assignee: Kyle Nusbaum
>
> Large highly connected topologies and large clusters write a lot of data into
> ZooKeeper. The heartbeats, that make up the majority of this data, do not
> need to be persisted to disk. Pacemaker is intended to be a secure
> replacement for storing the heartbeats without changing anything within the
> heartbeats. In the future as more metrics are added in, we may want to look
> into switching it over to look more like Heron, where a metrics server is
> running for each node/topology. And can be used to aggregate/per-aggregate
> them in a more scalable manor.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
