解决Warning Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock.

时间 2019-11-06

标签解决 warning couldn't couldn flush user prefs java.util.prefs.backingstoreexception java util backingstoreexception file lock 栏目 Java 繁體版

原文原文链接

系统：Ubuntu 16.04 LTSjava

环境：vscode+java extension pack打开了一个gradle的java项目；另外，用一个terminal启动了groovysheclipse

报错：jvm

groovysh报错 java.util.prefs.FileSystemPreferences syncWorld
警告: Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock.gradle

参考资料[1]:https://stackoverflow.com/questions/2027566/java-util-prefs-throwing-backingstoreexception-whythis

解决：code

根据[1]中“If two JVMs attempt to lock the file at the same then this is what you'll see.”进程

打开任务管理器，看到两个java进程，一个是vscode java extension 运行的 eclipse jdt 所启动的jvm（jvm1），另外一个是groovysh所启动的jvm（jvm2）ip

因此，是由于jvm1进程已经获取lock了，致使jvm2没法获取lock而报错terminal

关闭vscode的java项目以后，groovysh再也不报错get