Client side failover /load balancing

[meenarc]

Does Spring-Data-Solr handle client side failover,load balancing across multiple solr nodes(something like http://wiki.apache.org/solr/LBHttpSolrServer?)

[christophstrobl]

@meenarc yes. just use the type you want eg. CloudSolrServer in your configuration.

@Bean
public SolrServer solrServer() {
  return new CloudSolrServer("http://127.0.0.1/zk", new LBHttpSolrServer("http://127.0.0.1:8983/solr_1", "http://127.0.0.1:8983/solr_2"));
}

[meenarc]

So can the CloudSolrServer API be used , even in case of private clustered Solr installations. Like we are planning a DataStax Solr clustered set up

[christophstrobl]

Actually I never tested it against DataStax.

[meenarc]

I have another question-Can Spring Data Solr be used in a JRE 6 environment

[christophstrobl]

that pretty much depends on the solr-solrj version you're using. As off org.apache.solr:solr-solrj:4.8.0 you'll require to have at least Java 7.

[meenarc]

But can I assume that 1.3.0.RELEASE of spring-data-solr would be tied to SolrJ 4.7.2?
If you were to upgrade to using SolrJ 4.8 would it mean that there would be a newer version of spring-data-solr and to that extent I can go by the release version of spring-data-solr?

[christophstrobl]

You can expect sd-solr 1.3.x to stick with the solrj 4.7.x line.

We plan to upgrade solrj in 1.4.0 but keep spring-data-solr itself 1.6 compatible so that you sill can use it along with solrj 4.7.x in a Java 6 environment.

[meenarc]

I had tried to set up the Solr Template as follows

<solr:solr-server id="solrServer" url="http://10.63.20.128:8983/solr"/>

<bean id="solrTemplate" class="org.springframework.data.solr.core.SolrTemplate" >
    <constructor-arg ref="solrServer" />
    <constructor-arg index="1" value="${solr.core.datapages:datapages.spreadsheet_test}"/>
</bean>

Anytime I use the SolrTemplate I run into Caused by: org.apache.solr.client.solrj.SolrServerException: IOException occured when talking to server at: http://10.63.20.128:8983/solr/datapages.spreadsheet_test
at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:507)
at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:199)
at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:91)
at org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:301)
at org.springframework.data.solr.core.SolrTemplate$11.doInSolr(SolrTemplate.java:353)
at org.springframework.data.solr.core.SolrTemplate$11.doInSolr(SolrTemplate.java:350)
at org.springframework.data.solr.core.SolrTemplate.execute(SolrTemplate.java:132)
... 40 more
Caused by: org.apache.http.conn.ConnectTimeoutException: Connect to 10.63.20.128:8983 timed out
at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:129)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)

But when I use the SolrJ API directly as follows I am able to fetch results.

HttpSolrServer solrServer=new HttpSolrServer("http://10.63.20.128:8983/solr/datapages.spreadsheet_test") ;
SolrQuery query = new SolrQuery();
..........
solrServer.query(query);

In both cases the maven dependency is on the 1.3.0 RELEASE, so the SolrJ used above is the same as the one that used by the underlying Spring jars.

[christophstrobl]

@meenarc would you mind including your referenced solrServer bean definition?

[meenarc]

solr:solr-server id="solrServer" url="http://10.63.20.128:8983/solr"

The previous comment got badly formatted and am not sure if you got to view the contents.I just removed the end and clsoing tags of the solr bean definition I have and pasted it above since that seems to impact formatting.

[christophstrobl]

hmm... well that's strange. Would you mind opening an issue in JIRA. It would be really helpful if you could include (gist maybe) a small sample reproducing the error. thanks!