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https://issues.apache.org/jira/browse/SOLR-14095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17023866#comment-17023866
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Andy Webb commented on SOLR-14095:
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hi, I've been experimenting with upgrading to 8.5.0+ in a prototyping
environment using {{useUnsafeOverseerResponse=true}} and have found that a
mixed pool of older/newer nodes gives the exception
{{java.io.InvalidClassException: org.apache.solr.cloud.OverseerSolrResponse;
local class incompatible: stream classdesc serialVersionUID =
4721653044098960880, local class serialVersionUID = -3791204262816422245}} (or
vice-versa, depending on which node is the overseer). I've attached a PR to
SOLR-14219 which I've found resolved this issue - please would someone review
this?
thanks,
Andy
> Replace Java serialization with Javabin in Overseer operations
> --------------------------------------------------------------
>
> Key: SOLR-14095
> URL: https://issues.apache.org/jira/browse/SOLR-14095
> Project: Solr
> Issue Type: Task
> Reporter: Robert Muir
> Assignee: Tomas Eduardo Fernandez Lobbe
> Priority: Major
> Fix For: master (9.0), 8.5
>
> Attachments: SOLR-14095-json.patch, json-nl.patch
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Removing the use of serialization is greatly preferred.
> But if serialization over the wire must really happen, then we must use JDK's
> serialization filtering capability to prevent havoc.
> https://docs.oracle.com/javase/10/core/serialization-filtering1.htm#JSCOR-GUID-3ECB288D-E5BD-4412-892F-E9BB11D4C98A
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