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https://issues.apache.org/jira/browse/SOLR-12057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16388058#comment-16388058
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Webster Homer edited comment on SOLR-12057 at 3/6/18 4:35 PM:
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Our setup would likely have either Tlog or NRT replicas. Any setup would have
at least one of those, I wouldn't expect that you'd want to send to a PULL
replica since they cannot be masters.
We would like to favor TLOG replicas since they always give consistent search
results while NRT do not
was (Author: webhomer):
Our setup would likely have either Tlog or NRT replicas. Any setup would have
at least one of those, I wouldn't expect that you'd want to send to a PULL
replica since they cannot be masters.
> CDCR does not replicate to Collections with TLOG Replicas
> ---------------------------------------------------------
>
> Key: SOLR-12057
> URL: https://issues.apache.org/jira/browse/SOLR-12057
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: CDCR
> Affects Versions: 7.2
> Reporter: Webster Homer
> Priority: Major
> Attachments: cdcr-fail-with-tlog-pull.patch
>
>
> We created a collection using TLOG replicas in our QA clouds.
> We have a locally hosted solrcloud with 2 nodes, all our collections have 2
> shards. We use CDCR to replicate the collections from this environment to 2
> data centers hosted in Google cloud. This seems to work fairly well for our
> collections with NRT replicas. However the new TLOG collection has problems.
>
> The google cloud solrclusters have 4 nodes each (3 separate Zookeepers). 2
> shards per collection with 2 replicas per shard.
>
> We never see data show up in the cloud collections, but we do see tlog files
> show up on the cloud servers. I can see that all of the servers have cdcr
> started, buffers are disabled.
> The cdcr source configuration is:
>
> "requestHandler":{"/cdcr":{
> "name":"/cdcr",
> "class":"solr.CdcrRequestHandler",
> "replica":[
> {
>
> "zkHost":"[xxx-mzk01.sial.com:2181|http://xxx-mzk01.sial.com:2181/],[xxx-mzk02.sial.com:2181|http://xxx-mzk02.sial.com:2181/],[xxx-mzk03.sial.com:2181/solr|http://xxx-mzk03.sial.com:2181/solr]";,
> "source":"b2b-catalog-material-180124T",
> "target":"b2b-catalog-material-180124T"},
> {
>
> "zkHost":"[yyyy-mzk01.sial.com:2181|http://yyyy-mzk01.sial.com:2181/],[yyyy-mzk02.sial.com:2181|http://yyyy-mzk02.sial.com:2181/],[yyyy-mzk03.sial.com:2181/solr|http://yyyy-mzk03.sial.com:2181/solr]";,
> "source":"b2b-catalog-material-180124T",
> "target":"b2b-catalog-material-180124T"}],
> "replicator":{
> "threadPoolSize":4,
> "schedule":500,
> "batchSize":250},
> "updateLogSynchronizer":\{"schedule":60000}}}}
>
> The target configurations in the 2 clouds are the same:
> "requestHandler":{"/cdcr":{ "name":"/cdcr",
> "class":"solr.CdcrRequestHandler", "buffer":{"defaultState":"disabled"}}}
>
> All of our collections have a timestamp field, index_date. In the source
> collection all the records have a date of 2/28/2018 but the target
> collections have a latest date of 1/26/2018
>
> I don't see cdcr errors in the logs, but we use logstash to search them, and
> we're still perfecting that.
>
> We have a number of similar collections that behave correctly. This is the
> only collection that is a TLOG collection. It appears that CDCR doesn't
> support TLOG collections.
>
> It looks like the data is getting to the target servers. I see tlog files
> with the right timestamps. Looking at the timestamps on the documents in the
> collection none of the data appears to have been loaded.In the solr.log I see
> lots of /cdcr messages action=LASTPROCESSEDVERSION,
> action=COLLECTIONCHECKPOINT, and action=SHARDCHECKPOINT
>
> no errors
>
> Target collections autoCommit is set to 60000 I tried sending a commit
> explicitly no difference. cdcr is uploading data, but no new data appears in
> the collection.
>
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