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https://issues.apache.org/jira/browse/SOLR-10962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16064688#comment-16064688
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Christine Poerschke commented on SOLR-10962:
--------------------------------------------
At present we can have a _master_ or a _slave_ or _master and slave_ sections
in the request handler configuration i.e.
{code}
<requestHandler name="/replication" class="solr.ReplicationHandler">
<lst name="master">
<str name="commitReserveDuration">...</str>
...
</lst>
</requestHandler>
{code}
or
{code}
<requestHandler name="/replication" class="solr.ReplicationHandler">
<lst name="slave">
...
</lst>
</requestHandler>
{code}
or
{code}
<requestHandler name="/replication" class="solr.ReplicationHandler">
<lst name="master">
<str name="commitReserveDuration">...</str>
...
</lst>
<lst name="slave">
...
</lst>
</requestHandler>
{code}
and with the addition of a _cloud_ section the number of (valid and invalid)
combinations of sections would increase.
Instead of a new _cloud_ section
{code}
<requestHandler name="/replication" class="solr.ReplicationHandler">
<lst name="cloud">
<str name="commitReserveDuration">...</str>
</lst>
</requestHandler>
{code}
with (for now) just the one _commitReserveDuration_ element, how about making
_commitReserveDuration_ a top-level element i.e. in cloud mode
{code}
<requestHandler name="/replication" class="solr.ReplicationHandler">
<str name="commitReserveDuration">...</str>
</requestHandler>
{code}
and
{code}
<requestHandler name="/replication" class="solr.ReplicationHandler">
<str name="commitReserveDuration">...</str>
<lst name="master">
...
</lst>
...
</requestHandler>
{code}
in other modes?
_master.commitReserveDuration_ would be supported but deprecated for a
transition period and eventually it would go away.
> replicationHandler's reserveCommitDuration configurable in SolrCloud mode
> -------------------------------------------------------------------------
>
> Key: SOLR-10962
> URL: https://issues.apache.org/jira/browse/SOLR-10962
> Project: Solr
> Issue Type: New Feature
> Components: replication (java)
> Reporter: Ramsey Haddad
> Priority: Minor
> Attachments: SOLR-10962.patch
>
>
> With SolrCloud mode, when doing replication via IndexFetcher, we occasionally
> see the Fetch fail and then get restarted from scratch in cases where an
> Index file is deleted after fetch manifest is computed and before the fetch
> actually transfers the file. The risk of this happening can be reduced with a
> higher value of reserveCommitDuration. However, the current configuration
> only allows this value to be adjusted for "master" mode. This change allows
> the value to also be changed when using "SolrCloud" mode.
> https://lucene.apache.org/solr/guide/6_6/index-replication.html
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