I'm getting this error when I try to create a new core in solr.
root@ubuntu:/opt/solr# bin/solr create -c gettingstarted -n data_driven_schema_configs
Setup new core instance directory:
/var/solr/data/gettingstarted
Creating new core 'gettingstarted' using command:
http://localhost:8983/solr/admin/cores?action=CREATE&name=gettingstarted&instanceDir=gettingstarted
Failed to create core 'gettingstarted' due to: Error CREATEing SolrCore 'gettingstarted': Unable to create core [gettingstarted] Caused by: /var/solr/data/gettingstarted/data
Also, if I try to create alternatively, It gives me same error:
root@ubuntu:/opt/solr# bin/solr create -c mycore
Setup new core instance directory:
/var/solr/data/mycore
Creating new core 'mycore' using command:
http://localhost:8983/solr/admin/cores?action=CREATE&name=mycore&instanceDir=mycore
Failed to create core 'mycore' due to: Error CREATEing SolrCore 'mycore': Unable to create core [mycore] Caused by: /var/solr/data/mycore/data
In browser, when I try to access solr admin panel, it displays a notification like:
SolrCore Initialization Failures
opt/solr/example/exampledocs/*.xml: org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: /var/solr/data/opt/solr/example/exampledocs/*.xml/data
snapshot is attached.
Since it might help anybody with the same issue, it's indeed caused by permission issues when using root. The script doesn't terminate quickly when executing the command as root and instead creates a piece of the core definition before failing.
So first cleanup the broken core:
bin/solr delete -c mycore
Make sure that no folder(s) linger under /var/solr/data for your mycore core.
Next create the core as the solr user
su -u solr -c "/opt/solr/bin/solr create_core -c mycore"
This time it should succeed
Don't run solr script as root user (it is not recommended). You should run as solr user, e.g.:
sudo -u solr ./bin/solr create -c mycore
I found this as the solution:
sudo su - solr -c "/opt/solr/bin/solr create -c mycore"
More information here: https://www.howtoforge.com/tutorial/how-to-install-and-configure-solr-on-ubuntu-1604/
You can solve the problem with the following steps:
Check whether the directories with the right files are exist:
- /opt/solr/server/gettingstarted/conf/solrconfig.xml
- /opt/solr/server/gettingstarted/conf/schema.xml
- /opt/solr/server/gettingstarted/data
then open the Core Admin, "Add new core", enter the right directory/file names and add the core to the system. Actually it will give you an error message that the core already exists. Refresh the admin webpage in the browser and it will automatically load this core now without any error message.
Looks to me like a possible user permission issue. You seem to be running the commands as root, but some of the work is done by the Solr server. Is it possible that the server process is run with a user that does not have access to the directories mentioned in the error message.
this works normally with me... creating cores as the solr linux user.
sudo su - solr -c "/opt/solr/bin/solr create -c mycol1 -n data_driven_schema_configs"
来源：https://stackoverflow.com/questions/33851416/how-to-fix-error-createing-solrcore-gettingstarted-unable-to-create-core