I am getting collection timeout error while creating collection on Solr
Cloud. Below is the error.
> org.apache.solr.common.SolrException: createcollection the collection
time out:180s
at
org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:252)
at
org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:233)
This SolrCloud was up and running from 2 weeks. Prior to this, I have
created/deleted/reloaded collections on this SolrCloud. Suddenly, I started
getting this error while trying to create a collection. I am using external
Zookeeper ensemble.
When I tried to connect to Zookeeper ensemble through command line. Below
is something I found out.
> ls /overseer/collection-queue-work
[qn-0000000030, qn-0000000020, qn-0000000026, qn-0000000018, qn-0000000028,
qn-0000000016, qn-0000000022, qn-0000000014, qn-0000000024, qn-0000000012]
> get /overseer/collection-queue-work/qn-0000000012
{
"operation":"createcollection",
"fromApi":"true",
"name":"coll_4",
"replicationFactor":"2",
"collection.configName":"collConfig",
"numShards":"16",
"maxShardsPerNode":"4"}
There are many such requests which were in queue. All are related to
Collection API requests (eg: CREATE, DELETE, RELOAD etc). Can anyone please
tell me why Solr/ZK went into this state only for collection related APIs?
Although restart of Solr and Zookeeper worked, but, I can't ask for a
restart in production whenever this occurs. So, wanted to find the root
cause.
Thanks
