HTTP Status 500–internal Server Error Solution:

The error message is as follows:

HTTP Status 500–internal Server Error ...

The solution:
In the recent installation and configuration of SOLR Search server, the problem encountered, but by virtue of experience to see the problem, recorded to facilitate access to other people, the wrong contents of the following figure:

As shown in the error section above,
Note: Could not load conf for core collection1:error loading SOLR config FROM/HOME/WWW/SOLR/SOLR/HOME/COLLECTION1/CONF/SOLR Config.xml
Unable to load the configuration file for the core collection, I checked the path and found that "path" was written incorrectly, causing the SOLR core profile solrconfig.xml to be loaded when accessing the SOLR service.

This error is "Linux under the Solr4.10.4 Search engine installation and deployment," Configure SOLR in the boot need to load the configuration file path, the path of the profile is wrong, less write a layer caused unable to load to the core configuration file, the following figure:

After you modify the path correctly, you can access it normally, as shown in the following figure:

2017-12-27 records problems that lead to the same problem:

The name on FieldType is unique in SOLR, and if two or more FieldType identical name is configured, a conflict occurs that causes a SOLR service internal error, and a FieldType name ID is already present in the system. If you accidentally create a name of the FieldType node with the same name as ID, the same problem occurs, as shown in the following figure: