Mycat启动报错“wrapper | Unable to start JVM: No such file or directory (2)“

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在尝试启动Linux上的Mycat时遇到错误，表现为JVM无法找到。原因是缺少对JVM的配置。解决方法包括检查系统是否已安装JDK并确保在/bin/wrapper.conf文件中正确设置`wrapper.java.command`为Java安装路径。完成配置后，重新运行./mycatconsole命令即可成功启动Mycat。

异常

在Linux中执行./mycat consloe命令启动mycat报错如下：

[root@localhost bin]# ./mycat console
Running Mycat-server...
wrapper  | --> Wrapper Started as Console
wrapper  | Launching a JVM...
wrapper  | JVM exited while loading the application.
jvm 1    | wrapper  | Unable to start JVM: No such file or directory (2)
wrapper  | Launching a JVM...
wrapper  | JVM exited while loading the application.
jvm 2    | wrapper  | Unable to start JVM: No such file or directory (2)

wrapper  | Launching a JVM...
wrapper  | JVM exited while loading the application.
jvm 3    | wrapper  | Unable to start JVM: No such file or directory (2)
wrapper  | Launching a JVM...
wrapper  | JVM exited while loading the application.
jvm 4    | wrapper  | Unable to start JVM: No such file or directory (2)
wrapper  | Launching a JVM...
wrapper  | JVM exited while loading the application.
jvm 5    | wrapper  | Unable to start JVM: No such file or directory (2)
wrapper  | There were 5 failed launches in a row, each lasting less than 300 seconds.  Giving up.
wrapper  |   There may be a configuration problem: please check the logs.
wrapper  | <-- Wrapper Stopped

原因

没有配置JVM。

解决

先看系统中是否安装JDK，如果没有安装请先安装JDK，安装教程请参考：在Linux中安装JDK8

在/bin/wrapper.conf文件中添加如下内容，如果没有该文件，则创建该文件：

wrapper.java.command=java的安装目录/bin/java

本例中如下：

再执行./mycat console命令就会启动mycat成功