Nexus backup data in another node can't run

hello everyone, today we want to use Nexus3.27 in k8s with NFS HA, there are two NFS nodes .
A is master and another is Slave, we use " NFSv4+ serrsync+keepalive" to rsync data.

of course, there are use vip to mount in k8s . but when master’s keepalived stopped , the vip moved to slave node , nexus was broken with some error:

OpenJDK 64-Bit Server VM warning: Cannot open file ../sonatype-work/nexus3/log/jvm.log due to Permission denied

Warning:  Cannot open log file: ../sonatype-work/nexus3/log/jvm.log
Warning:  Forcing option -XX:LogFile=/tmp/jvm.log ../sonatype-work/nexus3/tmp/i4j_ZTDnGON8hezynsMX2ZCYAVDtQog=.lock (Permission denied)
	at Method)
	at com.install4j.runtime.launcher.util.SingleInstance.check(
	at com.install4j.runtime.launcher.util.SingleInstance.checkForCurrentLauncher(
	at com.install4j.runtime.launcher.UnixLauncher.checkSingleInstance(
	at com.install4j.runtime.launcher.UnixLauncher.main(
Unable to delete file: /nexus-data/cache/bundle157/
Unable to update instance pid: /nexus-data/instances/ (Permission denied)

we have checked the capacity of dir data.

root@nfs-nexus01:/home/nexus# du -sh /nexus
136M	/nexus

root@nfs-nexus02:/home/nexus# du -sh /nexus
136M	/nexus

but when I restart the master keepalived , the nexus is ok. I don’t know what happen.

By the way, I used docker to mount the slave exporter, it also doesn’t matter. I want to know if I scp all the data of Nexus Data Dir to another dir, Can it run again ?

it’s interesting to find that if I cp the master data to another dir in the same node, it’s ok. but if use scp the data to another node’s dir , it showed the error . are there any lock or anything else to cause it ? thanks