I don't know if this helps, but I had trouble creating collections due to a number of issues and I think I got this error (I was using the command line, not the UI)
As I recall, if it exists in Zookeeper, it will error out. It was a while ago, but I think the way I had to solve it was to go into Zookeeper and delete the "node". This was easier for me because I was using "chroot" in Zookeeper such that each collection was separate - so all I had to do was delete the entire node and start over. Take me with a grain of salt - it was a while ago. If you want, I have linux command lines for most / all of this... let me know. On Fri, Aug 12, 2016 at 11:10 AM, Alexandre Drouin < alexandre.dro...@orckestra.com> wrote: > Hi Esther-Melaine, > > The collection exists in Zookeeper under the /collections node and I can > see the shardX_replicaX folders under $SOLR_HOME/server/solr of both > servers. > > I was not able to replicate the issue using the collection API. Here are > the logs where I added the 'MyNewerNode' https://gist.github.com/orck- > adrouin/4d074cbb60141cba90c0aae9c55360d4 > > I took a closer look at the admin UI and here are my findings: > - In Chrome's devtool I can see the first create request > - After 10 seconds the request getting aborted and a second create > request is sent to the server > - In Fiddler I can see that the first request completes successfully > without any issues. The second request is sent a few seconds before the > first one ends so it looks like a admin UI issue. > > Is it possible that the admin UI has some kind of TTL for requests set to > 10 seconds? > > You mentioned something about the nodes going into recovery. Any idea how > I can fix this issue? > > My development environment (if it makes a difference): > - OS: Windows > - 2 Solr 6.1 nodes using SolrCloud. They both are running on the same > server using different ports. > - Zookeeper 3.4.8 > > Alexandre Drouin > > > -----Original Message----- > From: Esther-Melaine Quansah [mailto:esther.quan...@lucidworks.com] > Sent: August 12, 2016 10:46 AM > To: solr-user@lucene.apache.org > Subject: Re: Getting "collection already exists" when creating collection > in admin UI > Importance: High > > 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.confi > > gName=DefaultConfig&maxShardsPerNode=1&name=aaa&numShards=1&replicatio > > nFactor=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.OverseerCollectionMessageHandl > er.createCollection(OverseerCollectionMessageHandler.java:1832) > > at org.apache.solr.cloud.OverseerCollectionMessageHandl > er.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 > >
