Exception in thread "main" org.mvndaemon.mvnd.common.DaemonException$ConnectException: Timeout waiting to connect to the Maven daemon.

[hualr]

i cant use mavn-mvnd for the maven daemon can not be connected.why?

[ppalaga]

You may want to check the logs in ~/.m2/mvnd/registry/<version>/.

[gnodet]

In addition to the daemon log pointed by @ppalaga , you can enable logging on the client using

MAVEN_OPTS="-DconsoleLevel=trace" mvnd.sh -v

[Chris9809]

Same problem, and log shows

Exception in thread "main" java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.mvndaemon.mvnd.common.MavenDaemon.main(MavenDaemon.java:84)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException
	at org.mvndaemon.mvnd.daemon.Server.<init>(Server.java:121)
	... 5 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli.ParseException
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.mvndaemon.mvnd.common.MavenDaemon$1.findClass(MavenDaemon.java:69)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 6 more

[hualr]

Same problem, and log shows

Exception in thread "main" java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.mvndaemon.mvnd.common.MavenDaemon.main(MavenDaemon.java:84)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException
	at org.mvndaemon.mvnd.daemon.Server.<init>(Server.java:121)
	... 5 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli.ParseException
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.mvndaemon.mvnd.common.MavenDaemon$1.findClass(MavenDaemon.java:69)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 6 more

en,show this exception.