I also occurred this error.
you must upgrade to 5.6.1
and fix it refer below url
I also occurred this error.
you must upgrade to 5.6.1
and fix it refer below url
© 2020. All Rights Reserved - Elasticsearch
Apache, Apache Lucene, Apache Hadoop, Hadoop, HDFS and the yellow elephant logo are trademarks of the Apache Software Foundation in the United States and/or other countries.