[trouble shooting]memory locking requested for elasticsearch process but memory is not locked

 

 

엘라스틱서치 실행시 아래와 같이 오류발생확인

[2021-04-07T09:46:19,467][ERROR][o.e.b.Bootstrap] [darksharavim.com] node validation exception
[1] bootstrap checks failed. You must address the points described in the following [1] lines before starting Elasticsearch.
bootstrap check failure [1] of [1]: memory locking requested for elasticsearch process but memory is not locked

 

 

ulimit상태값

# ulimit -aS
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 31118
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 65535
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 4096
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

# ulimit -aH
core file size          (blocks, -c) unlimited
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 31118
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 65535
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) unlimited
cpu time               (seconds, -t) unlimited
max user processes              (-u) 4096
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

 

elasticsearch.yml설정값

path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
bootstrap.memory_lock: true
network.host: 0.0.0.0
http.port: 9200
discovery.seed_hosts: ["localhost"]

 

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메모리 상태

# free -g
              total        used        free      shared  buff/cache   available
Mem:              7           1           5           0           0           5
Swap:             5           0           5

 

 

아래와 같이 수정후 정상 구동

# vi /usr/lib/systemd/system/elasticsearch.service

아래 내용 추가
LimitMEMLOCK=infinity

# systemctl daemon-reload

# systemctl start elasticsearch
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; disabled; vendor preset: disabled)
   Active: active (running) since 수 2021-04-07 11:00:31 KST; 2min 25s ago
     Docs: https://www.elastic.co
 Main PID: 4259 (java)
   CGroup: /system.slice/elasticsearch.service
           ├─4259 /usr/share/elasticsearch/jdk/bin/java -Xshare:auto -Des.network...
           └─4451 /usr/share/elasticsearch/modules/x-pack-ml/platform/linux-x86_6...

 4월 07 10:59:53 mail.kajin7.com systemd[1]: Starting Elasticsearch...
 4월 07 11:00:31 mail.kajin7.com systemd[1]: Started Elasticsearch.

 

참고 : discuss.elastic.co/t/not-able-to-start-elasticsearch-due-to-failed-memory-lock/158009

Not able to start elasticsearch due to failed memory lock