On 7/1/2016 10:59 PM, Kent Mu wrote: > solr version: 4.9.0 I create and get a HttpSolrServer connection by > singleton pattern. I find the method of "shutdown" in solrj API, so I > decided to use "shutdown" to release resources, but I got the error as > below, It is due to singleton pattern?
If you call shutdown, that client object can no longer be used. You will need to make a new one. The expected usage pattern for the client object is that you will create one object when the program starts and use it for all threads until the program exits. Whether or not to use the singleton pattern for that is up to you. Usually the only time you would call shutdown is just before program exit ... but if the program is exiting, shutdown isn't really necessary. If you are in a situation where client objects are being regularly created, then you would want to do shutdown on each of them when you are finished so you don't have a resource leak. Creating many client objects is not recommended. Thanks, Shawn
