我在具有CentO 7的服务器上使用R中的h2o软件包。
我正确安装了库。 Java版本
<form action="save.php" method="POST" name="inputRecord" id="inputRecord">
<input type="text" name="member" id="member" value="Member A">
<input type="text" name="debit" id="debit" value="5000">
<input type="text" name="credit" id="credit" value="1000">
<input type="submit" name="save" id="save" value="OK">
</form>
//save.php
<?php
$limit=10;
$Member=Escape($_POST['member']);
$Debit=Escape($_POST['debit']);
$Credit=Escape($_POST['credit']);
$Insert = "INSERT INTO table_name(Member,Debit,Credit) values('".$Member."','".$Debit."','".$Credit.")";
for($i=1;$i<=$limit;$i++){
$Inserting=mysqli_query($dbconnection,$Insert);
}
function Escape($string){
$string = preg_replace('/[^\p{L}\p{N}\s]/u', '', $string);
return $string;
}
?>
已正确设置为JAVA_HOME。
当我运行java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
时，我得到了一条带有错误的长消息
h2o.init()我查看了日志，这就是显示的内容
rary: xgboost4j_gpu
11-22 10:42:12.375 127.0.0.1:54321 31865 main INFO: XGBoost supported backends: [WITH_GPU, WITH_OMP]
11-22 10:42:12.375 127.0.0.1:54321 31865 main INFO: ----- H2O started -----
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Build git branch: rel-wright
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Build git hash: 0457fda98594a72aca24d06e8c3622d45bd545d2
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Build git describe: jenkins-rel-latest-stable-1-g0457fda
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Build project version: 3.20.0.8
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Build age: 2 months
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Built by: 'jenkins'
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Built on: '2018-09-21 16:54:12'
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Watchdog Build git branch: (unknown)
11-22 10:42:12.376 127.0.0.1:54321 31865 main INFO: Watchdog Build git hash: (unknown)
11-22 10:42:12.377 127.0.0.1:54321 31865 main INFO: Watchdog Build git describe: (unknown)
11-22 10:42:12.377 127.0.0.1:54321 31865 main INFO: Watchdog Build project version: (unknown)
11-22 10:42:12.377 127.0.0.1:54321 31865 main INFO: Watchdog Built by: (unknown)
11-22 10:42:12.377 127.0.0.1:54321 31865 main INFO: Watchdog Built on: (unknown)
11-22 10:42:12.377 127.0.0.1:54321 31865 main INFO: XGBoost Build git branch: (unknown)
11-22 10:42:12.377 127.0.0.1:54321 31865 main INFO: XGBoost Build git hash: (unknown)
11-22 10:42:12.377 127.0.0.1:54321 31865 main INFO: XGBoost Build git describe: (unknown)
11-22 10:42:12.377 127.0.0.1:54321 31865 main INFO: XGBoost Build project version: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: XGBoost Built by: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: XGBoost Built on: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: KrbStandalone Build git branch: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: KrbStandalone Build git hash: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: KrbStandalone Build git describe: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: KrbStandalone Build project version: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: KrbStandalone Built by: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: KrbStandalone Built on: (unknown)
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: Processed H2O arguments: [-name, H2O_started_from_R_datascience_msi886, -ip, localhost, -web_ip, localhost, -port, 54321, -ice_root, /tmp/RtmpooR6rF]
11-22 10:42:12.378 127.0.0.1:54321 31865 main INFO: Java availableProcessors: 4
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: Java heap totalMemory: 121.0 MB
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: Java heap maxMemory: 1.73 GB
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: Java version: Java 1.8.0_181 (from Oracle Corporation)
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: JVM launch parameters: [-Dsys.ai.h2o.debug.allowJavaVersions=11, -ea]
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: OS version: Linux 3.10.0-862.14.4.el7.x86_64 (amd64)
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: Machine physical memory: 7.80 GB
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: X-h2o-cluster-id: 1542879731843
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: User name: 'datascience'
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: IPv6 stack selected: false
11-22 10:42:12.379 127.0.0.1:54321 31865 main INFO: Possible IP Address: ens160 (ens160), fe80:0:0:0:250:56ff:feb4:1f23%ens160
11-22 10:42:12.380 127.0.0.1:54321 31865 main INFO: Possible IP Address: ens160 (ens160), 10.0.1.110
11-22 10:42:12.380 127.0.0.1:54321 31865 main INFO: Possible IP Address: lo (lo), 0:0:0:0:0:0:0:1%lo
11-22 10:42:12.380 127.0.0.1:54321 31865 main INFO: Possible IP Address: lo (lo), 127.0.0.1
11-22 10:42:12.380 127.0.0.1:54321 31865 main FATAL: On localhost/127.0.0.1 some of the required ports 54321, 54322 are not available, change -port PORT and try again.
[1] "localhost"
[1] 54321
[1] FALSE
[1] 503
[1] ""
但是这很奇怪，因为在运行所有这些之前，我验证了指定的端口可用。我非常绝望，希望您能提供帮助。
谢谢
更新
所以我设法跑步了。我跌倒了
11-22 10:42:12.380 127.0.0.1:54321 31865 main FATAL: On localhost/12 7.0.0.1 some of the required ports 54321, 54322 are not available, change -port PORT and try again.
并运行/home/datascience/.checkpoint/2018-11-20/lib/x86_64-redhat-linux-gnu/3.5.1/h2o/java
，我发现实例在端口54323下运行。
然后我回到R并运行
java -jar h2o.jar成功了。但为什么？？我关闭了所有内容，然后重新打开它，使工作正常的唯一方法是运行 h2o.init(ip='machine_ip',port=54321,max_mem_size='2g',startH2O=FALSE)
，然后转到R会话并运行java -jar h2o.jar
答案 0 :(得分：2)
h2o.init（）将查找现有的h2o实例。因为您是用“ java -jar h2o.jar”手动启动的，所以h2o.init（）找到了并连接了它。
如果您未指定IP地址，并且h2o.init（）找不到已经在运行的h2o实例，那么如果startH2O为true，则h2o.init（）会尝试创建一个。显示端口54321或端口54322不可用的消息恰恰表明了这一点。即使不是您想要的，也必须采取其中之一。使用“ netstat -anp”来诊断Linux上的端口使用情况。
答案 1 :(得分：1)
好吧，我找到了在公司工作的软件工程师的解决方案。
他只是简单地编写了一个bash，将其命名为“ java -jar h2o.jar”，它可以手动启动h2o集群，并且在R脚本中，我通过此脚本连接到现有的h2o实例
h2o.init(ip="machine_ip",port=number_port,startH2O=FALSE)