Troubleshooting: Apache error_log in IBMIHS/logs contains errors and grows large

After enabling Solr search and browsing the Madisons starter store, you notice that the Apache error_log in IBMIHS/logs contains errors and is too large.

Problem

The Apache error_log in IBMIHS/logs contains error messages similar to the following example:

ws_common: websphereBeginRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: 
/usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
...
ws_common: websphereShouldHandleRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereBeginRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereShouldHandleRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereBeginRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereShouldHandleRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereBeginRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereShouldHandleRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereBeginRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereShouldHandleRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml
ws_common: websphereBeginRequest: Config reloading FAILED; using old configws_common: websphereUpdateConfig: Failed to stat plugin config file: /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/plugin-cfg.xml

Solution

In the following directory:
- /WAS_installdir/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver
Locate the following files:
- plugin-key.kdb
- plugin-key.sth
Copy plugin-key.kdb and plugin-key.sth to /usr/WebSphere/Plugins/config/solrWebserver.
Change the file permission settings for each of the following folders from 0750 to 0755:
- /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/demo_solr
- /usr/WebSphere/AppServer/profiles/demo_solr/config/cells/demo_search_cell/nodes/demo_search_node/servers/solrWebserver/servers