bq:  I am talking about the built-in replication of SolrCloud

Ahhh, thanks for the clarification, I as waaaaay off in the weeds.

Erick

On Mon, Mar 26, 2012 at 9:42 AM, Per Steffensen (Commented) (JIRA)
<j...@apache.org> wrote:
>
>    [ 
> https://issues.apache.org/jira/browse/SOLR-3273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13238384#comment-13238384
>  ]
>
> Per Steffensen commented on SOLR-3273:
> --------------------------------------
>
> @Mark Miller: Thanks. We will try that. I would be very helpful if you could 
> state exactly what you expect in adminPath. Does it have to be exactly 
> "/admin/cores" or is "/admin/cores/myapp" allowed or does it have to be 
> something else. Thanks!
>
> @Erick Erickson: Please note that I am talking about the built-in replication 
> of SolrCloud and not "the old replication" described at 
> http://wiki.apache.org/solr/SolrReplication
>
>> 404 Not Found on action=PREPRECOVERY
>> ------------------------------------
>>
>>                 Key: SOLR-3273
>>                 URL: https://issues.apache.org/jira/browse/SOLR-3273
>>             Project: Solr
>>          Issue Type: Bug
>>          Components: SolrCloud
>>    Affects Versions: 4.0
>>         Environment: Any
>>            Reporter: Per Steffensen
>>            Assignee: Mark Miller
>>            Priority: Minor
>>
>> We have an application based on a recent copy of 4.0-SNAPSHOT. We have a 
>> preformance test setup where we performance test our application (and 
>> therefore indirectly Solr(Cloud)). When we run the performance test against 
>> a setup using SolrCloud without replication, everything seems to run very 
>> nicely for days. When we add replication to the setup the same performance 
>> test shows some problems - which we will report (and maybe help fix) in 
>> distinct issues here in jira.
>> About the setup - the setup is a little more complex than described below, 
>> but I believe the description will tell "enough":
>> We have two solr servers which we start from <solr-install>/example using 
>> this command (ZooKeepers have been started before) - we first start solr on 
>> server1, and then starts solr on server2 after solr on server1 finished 
>> starting up:
>> {code}
>> nohup java -Xmx4096m -Dcom.sun.management.jmxremote 
>> -DzkHost=server1:2181,server2:2181,server3:2181 
>> -Dbootstrap_confdir=./myapp/conf -Dcollection.configName=myapp_conf 
>> -Dsolr.solr.home=./myapp -Djava.util.logging.config.file=logging.properties 
>> -jar start.jar >./myapp/logs/stdout.log 2>./myapp/logs/stderr.log &
>> {code}
>> The ./myapp/solr.xml looks like this on server1:
>> {code:xml}
>> <?xml version="1.0" encoding="UTF-8" ?>
>> <solr persistent="false">
>>   <cores adminPath="/admin/myapp" host="server1" hostPort="8983" 
>> hostContext="solr">
>>     <core name="collA_slice1_shard1" instanceDir="." 
>> dataDir="collA_slice1_data" collection="collA" shard="slice1" />
>>   </cores>
>> </solr>
>> {code}
>> The ./myapp/solr.xml looks like this on server2:
>> {code:xml}
>> <?xml version="1.0" encoding="UTF-8" ?>
>> <solr persistent="false">
>>   <cores adminPath="/admin/myapp" host="server2" hostPort="8983" 
>> hostContext="solr">
>>     <core name="collA_slice1_shard2" instanceDir="." 
>> dataDir="collA_slice1_data" collection="collA" shard="slice1" />
>>   </cores>
>> </solr>
>> {code}
>> The first thing we observe is that Solr server1 (running 
>> collA_slice1_shard1) seems to start up nicely, but when Solr server2 
>> (running collA_slice1_shard2) is started up later it quickly reports the 
>> following in its solr.log an keeps doing that for a long time:
>> {code}
>> SEVERE: Error while trying to recover:org.apache.solr.common.SolrException: 
>> Not Found
>> request: 
>> http://server1:8983/solr/admin/cores?action=PREPRECOVERY&core=collA_slice1_shard1&nodeName=server2%3A8983_solr&coreNodeName=server2%3A8983_solr_collA_slice1_shard2&state=recovering&checkLive=true&pauseFor=6000&wt=javabin&version=2
>>         at 
>> org.apache.solr.common.SolrExceptionPropagationHelper.decodeFromMsg(SolrExceptionPropagationHelper.java:40)
>>         at 
>> org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:445)
>>         at 
>> org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:264)
>>         at 
>> org.apache.solr.cloud.RecoveryStrategy.sendPrepRecoveryCmd(RecoveryStrategy.java:188)
>>         at 
>> org.apache.solr.cloud.RecoveryStrategy.doRecovery(RecoveryStrategy.java:285)
>>         at 
>> org.apache.solr.cloud.RecoveryStrategy.run(RecoveryStrategy.java:206)
>> {code}
>> Please note that we have changed a little bit in the way errors are logged, 
>> but basically this means that Solr server2 gets an "404 Not Found" on its 
>> request 
>> "http://server1:8983/solr/admin/cores?action=PREPRECOVERY&core=collA_slice1_shard1&nodeName=server2%3A8983_solr&coreNodeName=server2%3A8983_solr_collA_slice1_shard2&state=recovering&checkLive=true&pauseFor=6000&wt=javabin&version=2";
>>  to Solr server1.
>> Seems like there is not a common agreement among the Solr servers on 
>> how/where to send those requests and how/where to listen for them.
>> Regards, Per Steffensen
>
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