检查bootstrap.memory_lock设置是否生效
get http://10.127.0.1:9200/_nodes?filter_path=**.mlockall 响应: { "nodes": { "9giihmDNRdS136KT52Gl5g": { "process": { "mlockall": true } }, "X0zQESeeT8uJ9kVXvHpl-w": { "process": { "mlockall": true } }, "w4hYw86rQhqL1ayGyUK1Kw": { "process": { "mlockall": true } } } }
如果您看到mlockall为false,则表示mlockall请求失败。您还将在日志中看到一行"Unable to lock JVM Memory"。
在Linux / Unix系统上最可能的原因是运行Elasticsearch的用户没有锁定内存的权限。解决方法如下:
https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-configuration-memory.html#mlockall