[SOLR-4471] Replication occurs even when a slave is already up to date.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.1
• Fix Version/s: 4.2, 6.0
• Component/s: replication (java)
• Labels: master replication slave version
• Assignee: Mark Miller
• Reporter: Andre Charton
• Created: 18/Feb/13 09:14
• Updated: 09/May/16 18:45
• Resolved: 23/Feb/13 03:28

Description

Scenario: master/slave replication, master delta index runs every 10 minutes, slave poll interval is 10 sec.

There was an issue SOLR-4413 - slave reads index from wrong directory, so slave is full copy index from master every time, which is fixed after applying this patch from 4413 (see script below).

Now on replication the slave downloads only updated files, but slave is create a new segement file and also a new version of index (generation is identical with master). On next polling the slave is download the full index again, because the new version slave is force a full copy.

Problem is the new version of index on the slave after first replication.

mkdir work
cd work
svn co http://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_1/
cd lucene_solr_4_1
patch -p0 < ../../patches/SOLR-4413.patch
cd solr
ant dist

Issue Links

• is duplicated by: SOLR-4482 SOLR 4.1 replication keeps downloading entire index from master
• is related to: SOLR-6415 TestReplicationHandler is drastically slower than it used to be.
• relates to: SOLR-4413 SolrCore#getIndexDir() contract change between 3.6 and 4.1