[2020-09-28T17:25:34,432][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: No match found
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:125) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:96) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.cli.Command.main(Command.java:62) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:89) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:82) ~[elasticsearch-5.1.1.jar:5.1.1]
Caused by: java.lang.IllegalStateException: No match found
at java.util.regex.Matcher.group(Matcher.java:536) ~[?:1.8.0_202]
at org.elasticsearch.monitor.os.OsProbe.getControlGroups(OsProbe.java:213) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.monitor.os.OsProbe.getCgroup(OsProbe.java:402) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.monitor.os.OsProbe.osStats(OsProbe.java:454) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.monitor.os.OsService.(OsService.java:45) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.monitor.MonitorService.(MonitorService.java:45) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.node.Node.(Node.java:345) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.node.Node.(Node.java:229) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.bootstrap.Bootstrap$6.(Bootstrap.java:214) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:214) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:306) ~[elasticsearch-5.1.1.jar:5.1.1]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[elasticsearch-5.1.1.jar:5.1.1]
… 6 more