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https://issues.apache.org/jira/browse/SOLR-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man updated SOLR-2044:
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Fix Version/s: (was: 4.0)
Summary: Replication ping page for use with Amazon EC2 and Multiple
Cores (was: Replication ping.jsp page for use with Amazon EC2 and Multiple
Cores)
Removing fix version since this issue hasn't gotten much attention lately and
doesn't appear to be a priority for anyone for 4.0.
As always: if someone wants to take on this work they are welcome to do so at
any time and the target release can be revisited
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In particular, JSP support has been removed from solr -- largely to ensure that
the data available in the Admin UI is always available via handlers -- so the
patch would need to be reworked into handler code of some kind.
My suggestion would be to add this logic directly into the ReplicationHandler
as an option that causes a failure if the indexversion is "0".
> Replication ping page for use with Amazon EC2 and Multiple Cores
> ----------------------------------------------------------------
>
> Key: SOLR-2044
> URL: https://issues.apache.org/jira/browse/SOLR-2044
> Project: Solr
> Issue Type: Bug
> Components: replication (java)
> Affects Versions: 1.4.1
> Reporter: Bill Bell
> Attachments: ping.jsp
>
>
> When hosting SOLR at Amazon there is an issue with load balancing and
> replication. This is especially useful when you are using multiple slaves
> behind
> the load balancer and a MASTER SOLR box. The Load Balancer at Amazon has no
> way of knowing that each SLAVE has data from the MASTER replicated. As soon
> as the instance starts,
> Amazon starts sending requests to the Slaves. You need to have the Slave
> running in order to get the files from the Master.
> The solution is to add a ping.jsp page that Amazon hits on the Slave
> Tomcat/Jetty instances. The ping.jsp checks all cores to make sure they all
> have data, otherwise it returns a non-200 values which signals Amazon
> to not send requests to the Slaves.
> Put this into your solr.war file as /admin/replication/ping.jsp
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