Hi Alexandre, The question here is why the create action is called twice. You’re getting that “collection already exists” error after the second action is called. Can you verify if MyNewNode exists in /collections in ZK or on the machines running Solr at $SOLR_HOME/server/solr/ Your logs show a lot of issues around the overseer and it looks like those nodes are going into recovery pretty frequently. Can you replicate this issue by creating a collection through the API (not through the UI):
http://localhost:8983/admin/collections?action=CREATE&name=MyNewerNode&numShards=1&replicationFactor=2&maxShardsPerNode=1&collection.configName=DefaultConfig Thanks, Esther > On Aug 12, 2016, at 10:05 AM, Alexandre Drouin > <alexandre.dro...@orckestra.com> wrote: > > Hello, > > I am running SolrCloud with 2 nodes (Solr 6.1 with SSL and basic auth) and > with one Zookeeper node (for development purposes) and when I try to create a > new collection in the admin UI with 'replicationFactor=2' I get a > "Connection to Solr lost" message and another message telling me " collection > already exists: MyNewNode". I made sure that a collection with the same name > does not exists and the issue does not appear with a replication factor of 1. > > > While debugging I saw that the create action is called twice with the > following parameters: > /solr/admin/collections?_=1471010473184&action=CREATE&collection.configName=DefaultConfig&maxShardsPerNode=1&name=aaa&numShards=1&replicationFactor=2&router.name=compositeId&routerName=compositeId&wt=json > > Can anyone replicate this issue? I have not found it in JIRA. > > > Below is the relevant log (if useful) and I posted the full logs here > https://gist.github.com/orck-adrouin/690d485ba0835320273e7b2e09fb3771 > > 63549 ERROR > (OverseerThreadFactory-5-thread-5-processing-n:orc-dev-solr-cd.local:8444_solr) > [ ] o.a.s.c.OverseerCollectionMessageHandler Collection: MyNewNode > operation: create failed:org.apache.solr.common.SolrException: collection > already exists: MyNewNode > at > org.apache.solr.cloud.OverseerCollectionMessageHandler.createCollection(OverseerCollectionMessageHandler.java:1832) > at > org.apache.solr.cloud.OverseerCollectionMessageHandler.processMessage(OverseerCollectionMessageHandler.java:224) > at > org.apache.solr.cloud.OverseerTaskProcessor$Runner.run(OverseerTaskProcessor.java:463) > at > org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$22(ExecutorUtil.java:229) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > at java.lang.Thread.run(Thread.java:745) > > Thanks, > Alexandre Drouin
