Error Message:

[2021-09-12T10:40:53,855][WARN ][o.e.b.JNANatives         ] [DESKTOP-BPG73KH] unable to install syscall filter:
java.lang.UnsupportedOperationException: seccomp unavailable: CONFIG_SECCOMP not compiled into kernel, CONFIG_SECCOMP and CONFIG_SECCOMP_FILTER are needed
        at org.elasticsearch.bootstrap.SystemCallFilter.linuxImpl(SystemCallFilter.java:342) ~[elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.SystemCallFilter.init(SystemCallFilter.java:617) ~[elasticsearch-7.7.0.jar:7.7.0]        at org.elasticsearch.bootstrap.JNANatives.tryInstallSystemCallFilter(JNANatives.java:260) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.Natives.tryInstallSystemCallFilter(Natives.java:113) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:116) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:178) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:393) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127) [elasticsearch-cli-7.7.0.jar:7.7.0]
        at org.elasticsearch.cli.Command.main(Command.java:90) [elasticsearch-cli-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126) [elasticsearch-7.7.0.jar:7.7.0]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) [elasticsearch-7.7.0.jar:7.7.0]

Solution:

Problem reason: because centos6 does not support seccomp, es5.2.1 defaults to bootstrap.system_call_filter is true for detection, so the detection fails. After the failure, the ES cannot be started directly. See: https://github.com/elastic/elasticsearch/issues/22899

Solution: configure bootstrap.system in elasticsearch. YML _ call_ If the filter is false, note that it should be under memory:

bootstrap.memory_lock: false
bootstrap.system_call_filter: false