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之前写公司项目用到 elasticsearch，遇到一些问题整理如下：
项目依赖的是 Elasticsearch
下载安装包： www.elastic.co/cn/download…
解压缩安装包
打开 终端 使用命令进入 bin目录 运行elasticsearch文件
我把文件包放在了 桌面上，所以用如下命令：
$ cd Desktop/elasticsearch-5.3.0/bin/
$ elasticsearch
运行后 报错：
No Java runtime present, requesting install.
Elasticsearch requires at least Java 8 but your Java version from /usr/bin/java does not meet this requirement
需要安装 java环境的 jdk才能运行，下面安装jdk
下载安装包： www.oracle.com/technetwork…
当你解压好了归档文件之后，Elasticsearch 已经准备好运行了。按照下面的操作，在前台(foregroud)启动 Elasticsearch：
cd elasticsearch-<version>
./bin/elasticsearch ① ②
① 如果你想把 Elasticsearch 作为一个守护进程在后台运行，那么可以在后面添加参数 -d 。
② 如果你是在 Windows 上面运行 Elasticseach，你应该运行 bin\elasticsearch.bat 而不是 bin\elasticsearch 。
测试 Elasticsearch 是否启动成功，可以打开另一个终端，执行以下操作：
curl 'http://localhost:9200/?pretty'
你应该得到和下面类似的响应(response)：
{
"name" : "Tom Foster",
"cluster_name" : "elasticsearch",
"version" : {
"number" : "2.1.0",
"build_hash" : "72cd1f1a3eee09505e036106146dc1949dc5dc87",
"build_timestamp" : "2015-11-18T22:40:03Z",
"build_snapshot" : false,
"lucene_version" : "5.3.1"
},
"tagline" : "You Know, for Search"
}
elastic search启动报错
导致的原因可能是因为之前运行的es还没有正常关闭。
npiabbd1e:elasticsearch-5.3.0 lijunshuang$ ./bin/elasticsearch
[2019-02-16T11:28:31,082][INFO ][o.e.n.Node ] [] initializing ...
[2019-02-16T11:28:31,128][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: failed to obtain node locks, tried [[/Users/lijunshuang/Desktop/work/elasticsearch-5.3.0/data/elasticsearch]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])?
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:127) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:58) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.cli.Command.main(Command.java:88) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) ~[elasticsearch-5.3.0.jar:5.3.0]
Caused by: java.lang.IllegalStateException: failed to obtain node locks, tried [[/Users/lijunshuang/Desktop/work/elasticsearch-5.3.0/data/elasticsearch]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])?
at org.elasticsearch.env.NodeEnvironment.<init>(NodeEnvironment.java:260) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.node.Node.<init>(Node.java:258) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.node.Node.<init>(Node.java:238) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.bootstrap.Bootstrap$6.<init>(Bootstrap.java:242) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:242) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:360) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) ~[elasticsearch-5.3.0.jar:5.3.0]
... 6 more
1、进行查看进程
$ ps aux | grep ‘elastic’ 。
2、关闭此进程
$ kill -9 进程号
3、重新启动es。
./bin/elasticsearch
查看启动成功了。
感谢
谢谢各位在百忙之中点开这篇文章，希望对你们能有所帮助，如有问题欢迎各位大佬指正。
如果觉得写得还行的话，那就点个赞吧。
