jmap -dump:format=b,file=core.dump 1
Picked up _JAVA_OPTIONS: -Xmx1G -Xms1G
Exception in thread "main" com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file /proc/1/root/tmp/.java_pid1: target process 1 doesn't respond within 10500ms or HotSpot VM not loaded
at jdk.attach/sun.tools.attach.VirtualMachineImpl.<init>(VirtualMachineImpl.java:100)
at jdk.attach/sun.tools.attach.AttachProviderImpl.attachVirtualMachine(AttachProviderImpl.java:58)
at jdk.attach/com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:207)
at jdk.jcmd/sun.tools.jmap.JMap.executeCommandForPid(JMap.java:128)
at jdk.jcmd/sun.tools.jmap.JMap.dump(JMap.java:208)
at jdk.jcmd/sun.tools.jmap.JMap.main(JMap.java:114)
想生成dump文件,结果发现没有写文件权限
I have no name!@d834ffe5656e:/$ jmap -dump:format=b,file=core.dump 1
Picked up _JAVA_OPTIONS: -Xmx1G -Xms1G
Dumping heap to /core.dump ...
Unable to create /core.dump: Permission denied