无法启动 Cassandra(CentOS7 上的单节点集群) [英] Can't start Cassandra (Single-Node Cluster on CentOS7)

问题描述

我想用一个非常简单的单节点集群启动 Cassandra，但我做不到.

I would like to start Cassandra with a very simple single-node cluster, but I can't do it.

我按照

https://www.digitalocean.com/community/tutorials/how-to-install-cassandra-and-run-a-single-node-cluster-on-a-ubuntu-vps

基本上，

1. 在 VirtualBox 上构建了一个全新的 CentOS 7 虚拟机.
2. 安装JDK，放在/usr/local/下，并创建路径.
3. 安装 Apache Cassandra，将其放在/root/下，为 lib 和日志制作目录，并将写入权限授予 Cassandra.

最后，当我以 root 用户身份运行时，

At the end, when I ran below as root user,

# sh ~/cassandra/bin/cassandra

出现下面的消息.

Running Cassandra as root user or group is not recommended - please start Cassandra using a different system user.
If you really want to force running Cassandra as root, use -R command line option.

所以，我跑了

# sh ~/cassandra/bin/cassandra -R

然后，我收到了下面的消息.

Then, I got the message below.

# [0.000s][warning][gc] -Xloggc is deprecated. Will use -Xlog:gc:/root/cassandra/bin/../logs/gc.log instead.
intx ThreadPriorityPolicy=42 is outside the allowed range [ 0 ... 1 ]
Improperly specified VM option 'ThreadPriorityPolicy=42'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

问题似乎与JVM有关，但我对它的原因和解决方案一无所知.

It seems the issue is related to JVM, but I have no clue regarding its cause and solution.

如果您对如何解决此问题有任何想法，请告诉我.

Please let me know if you have ideas of how to solve this issue.

我的环境如下:

• Windows 10
• VirtualBox 5.1.28
• CentOS-7-x86_64-Minimal-1611
• jdk-9.0.1
• apache-cassandra-3.11.1

推荐答案

正如 undefined_variable 所评论的，Java 8，而不是 9，工作得很好.感谢大家的帮助.

As undefined_variable commented, Java 8, instead of 9, worked just fine. Thanks everyone for trying to help.

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