Elasticsearch not read all shard and kibana index is missing after installed elastalert

Hi,

A week ago, i installed elastalert, installation was successful. But 2 days ago, my kibana index was gone, my shards not read by elasticsearch although the shard directory is still exist until now. And a new shard was created, named pleasereadthis . I don't know what really happened to my cluster.

Below is my shard list:
[root@system-elasticsearch indices]# ls /root/elasticsearch-1.5.2/data/es-system-trial2/nodes/0/indices/
logstash-2017.01.17 pleasereadthis

Actually on another node directory, i can see my another shards:
[root@system-elasticsearch indices]# ls /root/elasticsearch-1.5.2/data/es-system-trial2/nodes/1/indices/
es-system-trial2 logstash-2015.06.08 logstash-2015.07.01 logstash-2015.07.20 logstash-2015.08.08 logstash-2015.08.27 logstash-2015.09.15 logstash-2015.10.04
logstash-2015.01.23 logstash-2015.06.09 logstash-2015.07.02 logstash-2015.07.21 logstash-2015.08.09 logstash-2015.08.28 logstash-2015.09.16 logstash-2015.10.05
logstash-2015.04.10 logstash-2015.06.10 logstash-2015.07.03 logstash-2015.07.22 logstash-2015.08.10 logstash-2015.08.29 logstash-2015.09.17 logstash-2016.01.01
logstash-2015.04.12 logstash-2015.06.11 logstash-2015.07.04 logstash-2015.07.23 logstash-2015.08.11 logstash-2015.08.30 logstash-2015.09.18 logstash-2016.01.02
logstash-2015.04.18 logstash-2015.06.12 logstash-2015.07.05 logstash-2015.07.24 logstash-2015.08.12 logstash-2015.08.31 logstash-2015.09.19 logstash-2016.12.24
logstash-2015.05.25 logstash-2015.06.13 logstash-2015.07.06 logstash-2015.07.25 logstash-2015.08.13 logstash-2015.09.01 logstash-2015.09.20 logstash-2016.12.25
logstash-2015.05.26 logstash-2015.06.14 logstash-2015.07.07 logstash-2015.07.26 logstash-2015.08.14 logstash-2015.09.02 logstash-2015.09.21 logstash-2016.12.26
logstash-2015.05.27 logstash-2015.06.15 logstash-2015.07.08 logstash-2015.07.27 logstash-2015.08.15 logstash-2015.09.03 logstash-2015.09.22 logstash-2016.12.27
logstash-2015.05.28 logstash-2015.06.16 logstash-2015.07.09 logstash-2015.07.28 logstash-2015.08.16 logstash-2015.09.04 logstash-2015.09.23 logstash-2016.12.28
logstash-2015.05.29 logstash-2015.06.17 logstash-2015.07.10 logstash-2015.07.29 logstash-2015.08.17 logstash-2015.09.05 logstash-2015.09.24 logstash-2016.12.29
logstash-2015.05.30 logstash-2015.06.18 logstash-2015.07.11 logstash-2015.07.30 logstash-2015.08.18 logstash-2015.09.06 logstash-2015.09.25 logstash-2016.12.30
logstash-2015.05.31 logstash-2015.06.19 logstash-2015.07.12 logstash-2015.07.31 logstash-2015.08.19 logstash-2015.09.07 logstash-2015.09.26 logstash-2016.12.31
logstash-2015.06.01 logstash-2015.06.20 logstash-2015.07.13 logstash-2015.08.01 logstash-2015.08.20 logstash-2015.09.08 logstash-2015.09.27 logstash-2017.01.01
logstash-2015.06.02 logstash-2015.06.21 logstash-2015.07.14 logstash-2015.08.02 logstash-2015.08.21 logstash-2015.09.09 logstash-2015.09.28 logstash-2017.01.02
logstash-2015.06.03 logstash-2015.06.22 logstash-2015.07.15 logstash-2015.08.03 logstash-2015.08.22 logstash-2015.09.10 logstash-2015.09.29
logstash-2015.06.04 logstash-2015.06.23 logstash-2015.07.16 logstash-2015.08.04 logstash-2015.08.23 logstash-2015.09.11 logstash-2015.09.30
logstash-2015.06.05 logstash-2015.06.28 logstash-2015.07.17 logstash-2015.08.05 logstash-2015.08.24 logstash-2015.09.12 logstash-2015.10.01
logstash-2015.06.06 logstash-2015.06.29 logstash-2015.07.18 logstash-2015.08.06 logstash-2015.08.25 logstash-2015.09.13 logstash-2015.10.02
logstash-2015.06.07 logstash-2015.06.30 logstash-2015.07.19 logstash-2015.08.07 logstash-2015.08.26 logstash-2015.09.14 logstash-2015.10.03

Does anyone know what really happened and how to solve this so i can use my previous kibana index and see my previous shards ?

*my elasticsearch version is 1.5.2

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