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https://issues.apache.org/jira/browse/STORM-876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15011651#comment-15011651
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ASF GitHub Bot commented on STORM-876:
--------------------------------------
Github user d2r commented on a diff in the pull request:
https://github.com/apache/storm/pull/845#discussion_r45241587
--- Diff: storm-core/src/clj/backtype/storm/daemon/supervisor.clj ---
@@ -326,16 +330,60 @@
(log-error t "Error when
processing event")
(exit-process! 20 "Error when
processing an event")
))
+ :blob-update-timer (mk-timer :kill-fn (fn [t]
+ (log-error t "Error when
processing event")
+ (exit-process! 20 "Error when
processing a event")))
--- End diff --
Can we set `:timer-name` here in addition to the `:kill-fn`?
It might also be helpful for debugging to give a name here to the anonymous
`fn`, as we have seen some mysterious hangs while logging.
> Dist Cache: Basic Functionality
> -------------------------------
>
> Key: STORM-876
> URL: https://issues.apache.org/jira/browse/STORM-876
> Project: Apache Storm
> Issue Type: Improvement
> Components: storm-core
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Attachments: DISTCACHE.md, DistributedCacheDesignDocument.pdf
>
>
> Basic functionality for the Dist Cache feature.
> As part of this a new API should be added to support uploading and
> downloading dist cache items. storm-core.ser, storm-conf.ser and storm.jar
> should be written into the blob store instead of residing locally. We need a
> default implementation of the blob store that does essentially what nimbus
> currently does and does not need anything extra. But having an HDFS backend
> too would be great for scalability and HA.
> The supervisor should provide a way to download and manage these blobs and
> provide a working directory for the worker process with symlinks to the
> blobs. It should also allow the blobs to be updated and switch the symlink
> atomically to point to the new blob once it is downloaded.
> All of this is already done by code internal to Yahoo! we are in the process
> of getting it ready to push back to open source shortly.
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