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https://issues.apache.org/jira/browse/STORM-634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15381936#comment-15381936
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ASF GitHub Bot commented on STORM-634:
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Github user danny0405 commented on the issue:
https://github.com/apache/storm/pull/414
@revans2 ,hi，i really want to know how to upgrade storm for our cluster
now, there are 1500+ topologies now on our cluster, and we backup our existing
topologies , kill all of them , perform the upgrade and resubmit all the
topologies every time. It's really awful and not suitable for long running
tasks, so appreciate your suggestions very mush
> Storm should support rolling upgrade/downgrade of storm cluster.
> ----------------------------------------------------------------
>
> Key: STORM-634
> URL: https://issues.apache.org/jira/browse/STORM-634
> Project: Apache Storm
> Issue Type: Dependency upgrade
> Components: storm-core
> Reporter: Parth Brahmbhatt
> Assignee: Parth Brahmbhatt
> Fix For: 0.10.0
>
>
> Currently when a new version of storm is released in order to upgrade
> existing storm clusters users need to backup their existing topologies , kill
> all the topologies , perform the upgrade and resubmit all the topologies.
> This is painful and results in downtime which may not be acceptable for
> "Always alive" production systems.
> Storm should support a rolling upgrade/downgrade deployment process to avoid
> these downtimes and to make the transition to a different version effortless.
> Based on my initial attempt the primary issue seem to be the java
> serialization used to serialize java classes like StormBase, Assignment,
> WorkerHeartbeat which is then stored in zookeeper. When deserializing if the
> serial versions do not match the deserialization fails resulting in processes
> just getting killed indefinitely. We need to change the Utils/serialize and
> Utils/deserialize so it can support non java serialization mechanism like
> json.
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