cantOS 6.x version
elasticsearch 6.x version
es6.x version default bootstrap.system_call_filter detected as true, centos version does not support, resulting in detection failure
Add configuration elasticsearch.yml
#
# Lock the memory on startup:
#
bootstrap.memory_lock: false
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
bootstrap.system_call_filter: false