Upgrade Elasticsearch 6.8.1 to 7.9.1 on Windows

Make sure you have the following variables pointing to the correct installation and config:
ES_HEAP_SIZE=4g [could be different based on your machine resources]
ES_HOME=C:\elasticsearch-7.9.1 [point to the right location of the new installation]
ES_PATH_CONF=C:\elasticsearch-7.9.1\config [point to the right location of the configuration files]
ES_JAVA_OPTS=-Des.path.home=%ES_HOME%;-Des.path.conf=%ES_PATH_CONF%;

If you receive the error 'ERROR: the system property [es.path.conf] must be set', do the following:
1. Insert the following in the elasticsearch-service.bat after 'if not "%ES_JAVA_OPTS%" == "" set ES_JAVA_OPTS=%ES_JAVA_OPTS: =;%' (around line 133):
if not "%ES_JAVA_OPTS%" == "" set ES_JAVA_OPTS=%ES_JAVA_OPTS:;;=;%

2. In around line 205, search for '"%EXECUTABLE%"' and add the following before:
if not "%ES_JAVA_OPTS%" == "" set ES_JAVA_OPTS=%ES_JAVA_OPTS:;;=;%

3. Restart your service

Видео Upgrade Elasticsearch 6.8.1 to 7.9.1 on Windows канала Octane and ValueEdge Academy