Cassandra死了，但是pid文件存在 [英] Cassandra dead but pid file exists

问题描述

我对cassandra不熟悉，并尝试在centos 7.0上安装cassandra-2.1.2。
完全安装后，执行cqlsh命令并创建一些键空间和列族。
在我看来乍看之下它工作得很好。

I have novice to cassandra and tried my hands to install cassandra-2.1.2 on centos 7.0. After complete installation execute cqlsh command and created few keyspace(s) and column family. Which seems to me in first glance its working perfectly.

但是后来我意识到以下问题：

But later onwards i realized below issues:

1-当我执行 service cassandra status命令时，出现以下错误：

1- when i execute "service cassandra status" command, i got below error:

输出：Cassandra死了，但是pid文件存在。

Output:Cassandra dead but pid file exists.

我搜索了上述问题，并找到了一些链接

I googled the above issue and found some links

http://www.datastax.com/support-forums/topic/dse-dead-but-pid-file-exists

https://baioradba.wordpress.com/2014/06/13/how-to-install-cassandra-on-centos-6-5/

发现我在上面的链接中提到了相同的配置，但是仍然存在相同的错误。

and found that I had same configuration mentioned in above links but the same error still persists.

请告诉我根本原因和解决方法。

Please tell me the root cause and how to resolve it.

2-第二个问题在cassandra.log文件中。

2- Second issue is in the cassandra.log file.

当我分析解析cassandra.log文件时，期望如下：

When I analysed the cassandra.log file there was an expection as :

期待变量URI：[cassandra.config]。请为文件添加前缀file：///（对于本地文件）或file：//< server> /（对于远程文件）。正在终止。

下面是完整的日志：

12:01:40.816 [main] ERROR o.a.c.config.DatabaseDescriptor - Fatal configuration error
org.apache.cassandra.exceptions.ConfigurationException: Expecting URI in variable: [cassandra.config].  Please prefix the file with file:/// for local files or file://<server>/ for remote files.  Aborting.
    at org.apache.cassandra.config.YamlConfigurationLoader.getStorageConfigURL(YamlConfigurationLoader.java:73) ~[apache-cassandra-2.1.3.jar:2.1.3]
    at org.apache.cassandra.config.YamlConfigurationLoader.loadConfig(YamlConfigurationLoader.java:84) ~[apache-cassandra-2.1.3.jar:2.1.3]
    at org.apache.cassandra.config.DatabaseDescriptor.loadConfig(DatabaseDescriptor.java:158) ~[apache-cassandra-2.1.3.jar:2.1.3]
    at org.apache.cassandra.config.DatabaseDescriptor.<clinit>(DatabaseDescriptor.java:133) ~[apache-cassandra-2.1.3.jar:2.1.3]
    at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:110) [apache-cassandra-2.1.3.jar:2.1.3]
    at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:465) [apache-cassandra-2.1.3.jar:2.1.3]
    at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:554) [apache-cassandra-2.1.3.jar:2.1.3]
Expecting URI in variable: [cassandra.config].  Please prefix the file with file:/// for local files or file://<server>/ for remote files.  Aborting.

致命的配置错误；无法启动。

Fatal configuration error; unable to start. See log for stacktrace.

我再次在google中搜索了相同的问题，但是链接没有那么有用，因为它们包含了cassandra.config的Java类代码。

I again searched the same issue in google and but the links were not that useful as they contained the java class code for cassandra.config .

再次请告知根本原因以及如何解决该问题？

Again please tell the root cause and how to resolve it?

预先感谢。

推荐答案

rm /var/run/cassandra.pid

Run ps -ef | grep cassandra

杀死<< c $ c> pid code> cassandra 进程。

Kill the pid of the cassandra process.

开始 cassandra

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