Hi Vadim,
I too am experimenting with SolrCloud and need help with setting it up
using Tomcat as the java servlet container.
While searching for help on this question, I found another thread in
the solr-mailing-list that is helpful.
In case you haven't seen this thread that I found, please search the
solr-mailing-list for: "SolrCloud new...."
You can also view it at nabble using this link:
http://lucene.472066.n3.nabble.com/SolrCloud-new-td1528872.html
Best,
Jerry M.
On Wed, Mar 21, 2012 at 5:51 AM, Vadim Kisselmann
<v.kisselm...@googlemail.com> wrote:
>
> Hello folks,
>
> i read the SolrCloud Wiki and Bruno Dumon's blog entry with his "First
> Exploration of SolrCloud".
> Examples and a first setup with embedded Jetty and ZK WORKS without problems.
>
> I tried to setup my own configuration with Tomcat and an external
> Zookeeper(my Master-ZK), but it doesn't work really.
>
> My setup:
> - latest Solr version from trunk
> - Tomcat 6
> - external ZK
> - Target: 1 Server, 1 Tomcat, 1 Solr instance, 2 collections with
> different config/schema
>
> What i tried:
> ------------------
> 1. After checkout i build solr(ant run-example), it works.
> -----------------------
> 2. I send my config/schema files to external ZK with Jetty:
> java -Djetty.port=8080 -Dbootstrap_confdir=/root/solrCloud/conf/
> -Dcollection.configName=conf1 -DzkHost=master-zk:2181 -jar start.jar
> it works, too.
> -------------------------------
> 3. I create my ("empty, without cores")solr.xml, like Bruno:
> http://www.ngdata.com/site/blog/57-ng.html#disqus_thread
> -------------------------------------------
> 4. I started my Tomcat, and get the first error:
> in UI: This interface requires that you activate the admin request
> handlers, add the following configuration to your solrconfig.xml:
> <!-- Admin Handlers - This will register all the standard admin
> RequestHandlers. -->
> <requestHandler name="/admin/" class="solr.admin.AdminHandlers" />
> Admin request Handlers are definitely activated in my solrconfig.
>
> I get this error only with the latest trunk versions, with r1292064
> from February not. Sometimes it works with the new version, sometimes
> not and i get this error.
>
> ----------------------------------
> 5. Ok , it it works, after few restarts, i changed my JAVA_OPTS for
> Tomcat and added this: "-DzkHost=master-zk:2181"
> Next Error:
> This The web application [/solr2] appears to have started a thread
> named [main-SendThread(master-zk:2181)] but has failed to stop it.
> This is very likely to create a memory leak.
> Exception in thread "Thread-2" java.lang.NullPointerException
> at
> org.apache.solr.cloud.Overseer$CloudStateUpdater.amILeader(Overseer.java:179)
> at org.apache.solr.cloud.Overseer$CloudStateUpdater.run(Overseer.java:104)
> at java.lang.Thread.run(Thread.java:662)
> 15.03.2012 13:25:17 org.apache.catalina.loader.WebappClassLoader loadClass
> INFO: Illegal access: this web application instance has been stopped
> already. Could not load org.apache.zookeeper.server.ZooTrace. The
> eventual following stack trace is caused by an error thrown for
> debugging purposes as well as to attempt to terminate the thread which
> caused the illegal access, and has no functional impact.
> java.lang.IllegalStateException
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1531)
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
> at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1196)
> 15.03.2012 13:25:17 org.apache.coyote.http11.Http11Protocol destroy
>
> -----------------------------------------
> 6. Ok, we assume, that the first steps works, and i would create new
> cores and my 2 collections. My requests with CoreAdminHandler are ok,
> my solr.xml looks like this:
> <?xml version="1.0" encoding="UTF-8" ?>
> <solr persistent="true">
> <cores adminPath="/admin/cores" zkClientTimeout="10000" hostPort="8080"
> hostContext="solr">
> <core
> name="shard1_data"
> collection="col1"
> shard="shard1"
> instanceDir="xxx/" />
> <core
> name="shard2_data"
> collection="col2"
> shard="shard2"
> instanceDir="xx2/" />
> </cores>
> </solr>
>
> Now i get the following exception: ".......couldn't find conf name for
> collection1..........."
> I don't have an collection 1. Why this exception?
>
> ---------------------------------------
> You can see, there are too many exceptions and eventually
> configuration problems with Tomcat and an external ZK.
> Has anyone set up an "identical" configuration and does it work?
> Does anyone detect mistakes in my configuration steps?
>
> Best regards
> Vadim
