Why my elasticsearch(5.6.3) node cannot load data on disk?


I have a cluster which have two nodes; Today morning, the disk space of master node used up and crash. When I restart this node, I can't find any of shards in the node. But data of node is still in data.path.
It is strange that even though data is missing, the cluster will run shards transfer. But my cluster do nothing. The status of cluster is always yellow.

Why those data cannot be loaded?
And how to recover my data?

Pleases help me !
Thank you very much!

My elasticsearch.yml is:

cluster.name: elasticsearch_production
node.name: node_172_20_0_12
node.master: false
path.data: /data1/elasticsearch/data, /data1/elasticsearch/data1
path.logs: /data1/elasticsearch/log
network.host: ['', '']
discovery.zen.ping.unicast.hosts: [""]
xpack.security.enabled: false
xpack.watcher.enabled: false
xpack.monitoring.collection.interval: 60s

Here is part of my data in disk:

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