Elasticsearch status red and shard percent stop at 85%

My ELK stack stoped yesterday, and I found it was because elasticsearch stoped. And I restart it, but logstash can not write data into it. I checked /_cat/health, and got this:

Later I restart it again, the active_shards_percent_as_number stop at about 87% again.

How to solve this problem? Thanks.

This output shows two initialising shards; when they finish initialising then the active shard percentage will increase, and some more shards will likely start initialising too. With patience, all shards should eventually be assigned. If they are not, and your cluster health is still red, then the following blog post should help:

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