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https://issues.apache.org/jira/browse/SOLR-15412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17347409#comment-17347409
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Noble Paul edited comment on SOLR-15412 at 5/19/21, 10:16 AM:
--------------------------------------------------------------

{quote}Add an upgrade note to the upcoming 8.9 release - that users should 
inspect state.json files for "null" values before upgrading
{quote}
This is a extremely hard unless there is a tool to do so
{quote}Fix the (pre-8.5?) bug that causes null-values to be written.
{quote}
This is not really helpful if the data is already written
{quote}Make the validation more lenient as suggested by AB
{quote}
We must do this.



{quote}I cannot see how the presence of a 1 yr old bug warrants a separate 
release.{quote}

Our users upgrade pretty late. There are very few users who deploy the latest 
release. So, letting people know in some way there is a possible bug really 
helps


was (Author: noble.paul):
{quote}Add an upgrade note to the upcoming 8.9 release - that users should 
inspect state.json files for "null" values before upgrading{quote}

This is a extremely hard unless there is a tool to do so

bq. Fix the (pre-8.5?) bug that causes null-values to be written. 

This is not really helpful if the data is already written

bq.Make the validation more lenient as suggested by AB

We must do this. 

> Strict validation on Replica metadata can cause complete outage
> ---------------------------------------------------------------
>
>                 Key: SOLR-15412
>                 URL: https://issues.apache.org/jira/browse/SOLR-15412
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 8.5
>            Reporter: Ishan Chattopadhyaya
>            Priority: Blocker
>             Fix For: 8.9
>
>
> More details in SOLR-14245. Intention of this issue is to reduce the impact 
> of the changes in SOLR-14245 and immediately issue a breakfix release for the 
> users who want to upgrade to 8.5+.



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