Hi,
Yes, Andy has the right idea. If no zk-chroot is being used,
"Optional.empty()" is the correct value to specify, not null.
This API is a bit trappy (or at least unintuitive), and we're in the
process of hashing out some doc improvements (and/or API changes). If
you're curious or would otherwise like to weigh in, check out SOLR-12309.
Best,
Jason
On Mon, Jun 18, 2018 at 1:09 PM, Andy C <andycs...@gmail.com> wrote:
> I am using the following (Solr 7.3.1) successfully:
>
> import java.util.Optional;
>
> Optional<String> chrootOption = null;
> if (StringUtils.isNotBlank(_zkChroot))
> {
> chrootOption = Optional.of(_zkChroot);
> }
> else
> {
> chrootOption = Optional.empty();
> }
> CloudSolrClient client = new CloudSolrClient.Builder(_zkHostList,
> chrootOption).build();
>
> Adapted from code I found somewhere (unit test?). Intent is to support the
> option of configuring a chroot or not (stored in "_zkChroot")
>
> - Andy -
>
> On Mon, Jun 18, 2018 at 12:53 PM, THADC <timothy.clotworthy.j...@gmail.com
> >
> wrote:
>
> > Hello,
> >
> > I am using solr 7.3 and zookeeper 3.4.10. I have custom client code that
> is
> > supposed to connect the a zookeeper cluster. For the sake of clarity, the
> > main code focus:
> >
> >
> > private synchronized void initSolrClient()
> > {
> > List<String> zookeeperList = new ArrayList<String>();
> >
> > zookeeperList.add("http://100.12.119.10:2281";);
> > zookeeperList.add("http://100.12.119.10:2282";);
> > zookeeperList.add("http://100.12.119.10:2283";);
> >
> > String collectionName = "myCollection"
> >
> > log.debug("in initSolrClient(), collectionName: " +
> > collectionName);
> >
> > try {
> > solrClient = new CloudSolrClient.Builder(
> zookeeperList,
> > null).build();
> >
> > } catch (Exception e) {
> > log.info("Exception creating solr client object.
> > ");
> > e.printStackTrace();
> > }
> > solrClient.setDefaultCollection(collectionName);
> > }
> >
> > Before executing, I test that all three zoo nodes are running
> > (./bin/zkServer.sh status zoo.cfg, ./bin/zkServer.sh status zoo2.cfg,
> > ./bin/zkServer.sh status zoo3.cfg). The status shows the quorum is
> > up and running, with one nodes as the leader and the other two as
> > followers.
> >
> > When I execute my java client to connect to the zookeeper cluster, I get
> :
> >
> > java.lang.NullPointerException
> > at
> > org.apache.solr.client.solrj.impl.CloudSolrClient$Builder.<
> > init>(CloudSolrClient.java:1387)
> >
> >
> > I am assuming it has a problem with my null value for zkChroot, but not
> > certain. Th API says zkChroot is the path to the root ZooKeeper node
> > containing Solr data. May be empty if Solr-data is located at the
> ZooKeeper
> > root.
> >
> > I am confused on what exactly should go here, and when it can be null. I
> > cannot find any coding examples.
> >
> > Any help greatly appreciated.
> >
> >
> >
> >
> > --
> > Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
> >
>
