elasticsearch 7.2 启动异常 Failed to create native process factories for Machine Learning

elasticsearch 7.2 启动异常

操作系统：windows 2008R2

问题描述

windows 2008服务器，启动elasticsearch7.2时提示错误：

[2019-07-11T21:42:38,026][ERROR][o.e.b.Bootstrap          ] [WSSJZX-121] Exception
org.elasticsearch.ElasticsearchException: Failed to create native process factories for Machine Learning
	at org.elasticsearch.xpack.ml.MachineLearning.createComponents(MachineLearning.java:455) ~[?:?]
	at org.elasticsearch.node.Node.lambda$new$9(Node.java:438) ~[elasticsearch-7.2.0.jar:7.2.0]
	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:267) ~[?:1.8.0_162]
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382) ~[?:1.8.0_162]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[?:1.8.0_162]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[?:1.8.0_162]
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[?:1.8.0_162]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_162]
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[?:1.8.0_162]
	at org.elasticsearch.node.Node.(Node.java:441) ~[elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.node.Node.(Node.java:251) ~[elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:221) ~[elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:221) ~[elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349) [elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) [elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) [elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) [elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) [elasticsearch-cli-7.2.0.jar:7.2.0]
	at org.elasticsearch.cli.Command.main(Command.java:90) [elasticsearch-cli-7.2.0.jar:7.2.0]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:115) [elasticsearch-7.2.0.jar:7.2.0]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) [elasticsearch-7.2.0.jar:7.2.0]
Caused by: java.io.FileNotFoundException: \\.\pipe\controller_log_4652 (系统找不到指定的文件。)
	at java.io.FileInputStream.open0(Native Method) ~[?:1.8.0_162]
	at java.io.FileInputStream.open(FileInputStream.java:195) ~[?:1.8.0_162]
	at java.io.FileInputStream.(FileInputStream.java:138) ~[?:1.8.0_162]
	at java.io.FileInputStream.(FileInputStream.java:93) ~[?:1.8.0_162]
	at org.elasticsearch.xpack.ml.utils.NamedPipeHelper$PrivilegedInputPipeOpener.run(NamedPipeHelper.java:288) ~[?:?]
	at org.elasticsearch.xpack.ml.utils.NamedPipeHelper$PrivilegedInputPipeOpener.run(NamedPipeHelper.java:277) ~[?:?]
	at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_162]
	at org.elasticsearch.xpack.ml.utils.NamedPipeHelper.openNamedPipeInputStream(NamedPipeHelper.java:130) ~[?:?]
	at org.elasticsearch.xpack.ml.utils.NamedPipeHelper.openNamedPipeInputStream(NamedPipeHelper.java:97) ~[?:?]
	at org.elasticsearch.xpack.ml.process.ProcessPipes.connectStreams(ProcessPipes.java:131) ~[?:?]
	at org.elasticsearch.xpack.ml.process.NativeController.(NativeController.java:62) ~[?:?]
	at org.elasticsearch.xpack.ml.process.NativeControllerHolder.getNativeController(NativeControllerHolder.java:40) ~[?:?]
	at org.elasticsearch.xpack.ml.MachineLearning.createComponents(MachineLearning.java:440) ~[?:?]
	... 20 more

解决办法

elasticsearch 7.2默认启用机器学习功能，此功能使用SSE4.2指令，因此仅适用于CPU 支持 SSE4.2的机器。如果在旧硬件上运行Elasticsearch，则必须禁用机器学习（通过设置xpack.ml.enabled 为false）。
编辑配置文件：config\elasticsearch.yml，添加如下内容：

xpack.ml.enabled: false

参考

https://www.elastic.co/guide/en/elasticsearch/reference/current/ml-settings.html
–END–