Symptom:
The "Elasticsearch instance in the ES cluster has an alarm indicating that the master fragment in the down state or a copy fragment in the down state exists in the "Elasticsearch instance.
Cause analysis:
View the ES log file elasticsearch_cluster.log that contains the ES fault instance. The error information is as follows: Unbale to access path.data /srv/BigData/elasticsearch/esmaster. You do not have the permission to access the directory.
http://10.88.69.40:7088/idp-edit-service/editor/image/25541599350/A-1_1_zh-cn_image_0171759221.png
Solution:
Go to the corresponding directory and find that the permission on the directory is root. Run the following command to change the current permission to omm:wheel: chown -R omm:wheel elasticsearch Go to the FusionInsight page and restart the faulty instance.
