qinf commented on issue #637:
URL: https://github.com/apache/maven-mvnd/issues/637#issuecomment-1159925367
>
I met the same problem, when I use mvd, its output is:
```bash
mvnd list
Exception in thread "main"
org.mvndaemon.mvnd.common.DaemonException$ConnectException: Could not connect
to the Maven daemon.Daemon id: 17c56133
log file: /Users/junzhong.qin/.m2/mvnd/registry/0.8.0/daemon-17c56133.log
----- Last 200 lines from daemon log file -
/Users/junzhong.qin/.m2/mvnd/registry/0.8.0/daemon-17c56133.log -----
11:20:24.334 D Initializing daemon with properties:
mvnd.home=/Users/junzhong.qin/.sdkman/candidates/mvnd/current
jdk.java.options=--add-opens java.base/java.io=ALL-UNNAMED --add-opens
java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.util=ALL-UNNAMED
--add-opens java.base/sun.net.www.protocol.jar=ALL-UNNAMED --add-opens
java.base/sun.nio.fs=ALL-UNNAMED
mvnd.noDaemon=false
mvnd.debug=false
mvnd.idleTimeout=3h
mvnd.keepAlive=100ms
mvnd.extClasspath=
mvnd.coreExtensions=
mvnd.enableAssertions=false
mvnd.expirationCheckDelay=10s
mvnd.duplicateDaemonGracePeriod=10s
mvnd.socketFamily=inet
11:20:24.341 I Daemon started
11:20:24.342 D daemon is running. Sleeping until state changes.
----- End of the daemon log file -----
output: /Users/junzhong.qin/.m2/mvnd/registry/0.8.0/daemon-17c56133.out.log
----- Last 200 lines from daemon output -
/Users/junzhong.qin/.m2/mvnd/registry/0.8.0/daemon-17c56133.out.log -----
----- End of the daemon output -----
at
org.mvndaemon.mvnd.client.DaemonConnector.connectToDaemonWithId(DaemonConnector.java:435)
at
org.mvndaemon.mvnd.client.DaemonConnector.startDaemon(DaemonConnector.java:287)
at
org.mvndaemon.mvnd.client.DaemonConnector.connect(DaemonConnector.java:121)
at
org.mvndaemon.mvnd.client.DefaultClient.execute(DefaultClient.java:284)
at
org.mvndaemon.mvnd.client.DefaultClient.main(DefaultClient.java:129)
Caused by: org.mvndaemon.mvnd.common.DaemonException$ConnectException: Could
not connect to server /127.0.0.1:51771.
at
org.mvndaemon.mvnd.client.DaemonConnector.connect(DaemonConnector.java:517)
at
org.mvndaemon.mvnd.client.DaemonConnector.connectToDaemon(DaemonConnector.java:446)
at
org.mvndaemon.mvnd.client.DaemonConnector.connectToDaemonWithId(DaemonConnector.java:432)
... 4 more
Caused by: java.io.IOException: Timeout
at
org.mvndaemon.mvnd.client.DaemonConnector.connect(DaemonConnector.java:494)
... 6 more
```
when using mvd.sh, its output is:
```bash
./mvnd.sh list
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError:
org/mvndaemon/mvnd/client/DefaultClient has been compiled by a more recent
version of the Java Runtime (class file version 55.0), this version of the Java
Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at
sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)
```
My mvnd version is 0.8.0 and my Java version is oracle64-1.8.0.333.
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